ASME BPVC. I I I .1 .NB-2017

Div is ion 1 — Subsect ion NBClass 1 Components

SECTION I I IRules for Construct ion ofNuclear Faci l i ty Components

2017 ASME Boiler andPressure Vessel CodeAn International Code

Markings  such as  “ASME,”  “ASME Standard,” or any other marking  including  “ASME,” ASME logos,  or  the  Certification Mark  shall  not  be  used  on  any  item  that  is  not  constructed  in accordance with all of the applicable requirements of the Code or Standard. Use of ASME’s name, logos, or Certification Mark  requires  formal ASME  certification;  if no  certification program  is available, such ASME markings may not be used. (For Certification and Accreditation Programs, see https://www.asme.org/shop/certification‐accreditation.)  Items produced by parties not formally certified by ASME may not be described, either explicitly or implicitly, as ASME certified or approved in any code forms or other document. 

https://www.asme.org/shop/certification-accreditation

IIIRULES FOR CONSTRUCTIONOF NUCLEAR FACILITYCOMPONENTS

Division 1 - Subsection NB

Class 1 ComponentsASME Boiler and Pressure Vessel Committeeon Construction of Nuclear Facility Components

AN INTERNATIONAL CODE

2017 ASME Boiler &Pressure Vessel Code2017 Edition July 1, 2017

Two Park Avenue • New York, NY • 10016 USA

Date of Issuance: July 1, 2017

This international code or standard was developed under procedures accredited as meeting the criteria forAmerican National Standards and it is an American National Standard. The Standards Committee that approvedthe code or standard was balanced to assure that individuals from competent and concerned interests havehad an opportunity to participate. The proposed code or standard was made available for public review and com-ment that provides an opportunity for additional public input from industry, academia, regulatory agencies, andthe public-at-large.ASME does not “approve,” “rate,” or “endorse” any item, construction, proprietary device, or activity.ASME does not take any position with respect to the validity of any patent rights asserted in connection with any

items mentioned in this document, and does not undertake to insure anyone utilizing a standard against liabilityfor infringement of any applicable letters patent, nor assume any such liability. Users of a code or standard areexpressly advised that determination of the validity of any such patent rights, and the risk of infringement of suchrights, is entirely their own responsibility.Participation by federal agency representative(s) or person(s) affiliated with industry is not to be interpreted as

government or industry endorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with the es-

tablished ASME procedures and policies, which precludes the issuance of interpretations by individuals.The endnotes and preamble in this document (if any) are part of this American National Standard.

ASME collective membership mark

Certification Mark

The above ASME symbol is registered in the U.S. Patent Office.

“ASME” is the trademark of The American Society of Mechanical Engineers.

No part of this document may be reproduced in any form, in an electronicretrieval system or otherwise, without the prior written permission of the

publisher.

Library of Congress Catalog Card Number: 56-3934Printed in the United States of America

Adopted by the Council of The American Society of Mechanical Engineers, 1914; latest edition 2017.

The American Society of Mechanical EngineersTwo Park Avenue, New York, NY 10016-5990

Copyright © 2017 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERS

All rights reserved

TABLE OF CONTENTS

List of Sections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xForeword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiiStatement of Policy on the Use of the Certification Mark and Code Authorization in Advertising . . . . . . . . . . xivStatement of Policy on the Use of ASME Marking to Identify Manufactured Items . . . . . . . . . . . . . . . . . . . . . . xivSubmittal of Technical Inquiries to the Boiler and Pressure Vessel Standards Committees . . . . . . . . . . . . . . . xvPersonnel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviiiOrganization of Section III . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxxviiSummary of Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xlList of Changes in Record Number Order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xliiiCross-Referencing and Stylistic Changes in the Boiler and Pressure Vessel Code . . . . . . . . . . . . . . . . . . . . . . . xliv

Article NB-1000 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1NB-1100 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

NB-1110 Aspects of Construction Covered by These Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1NB-1120 Temperature Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1NB-1130 Boundaries of Jurisdiction Applicable to This Subsection . . . . . . . . . . . . . . . . . . . . . . . . . 1NB-1140 Electrical and Mechanical Penetration Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Article NB-2000 Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7NB-2100 General Requirements for Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

NB-2110 Scope of Principal Terms Employed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7NB-2120 Pressure-Retaining Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7NB-2130 Certification of Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9NB-2140 Welding Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9NB-2150 Material Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9NB-2160 Deterioration of Material in Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9NB-2170 Heat Treatment to Enhance Impact Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9NB-2180 Procedures for Heat Treatment of Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9NB-2190 Non-Pressure-Retaining Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

NB-2200 Material Test Coupons and Specimens for Ferritic Steel Material . . . . . . . . . . . . . . . . . . 10NB-2210 Heat Treatment Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10NB-2220 Procedure for Obtaining Test Coupons and Specimens for Quenched and Tempered

Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10NB-2300 Fracture Toughness Requirements for Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

NB-2310 Material to Be Impact Tested . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12NB-2320 Impact Test Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13NB-2330 Test Requirements and Acceptance Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13NB-2340 Number of Impact Tests Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14NB-2350 Retests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15NB-2360 Calibration of Instruments and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

NB-2400 Welding Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16NB-2410 General Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16NB-2420 Required Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16NB-2430 Weld Metal Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16NB-2440 Storage and Handling of Welding Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

NB-2500 Examination and Repair of Pressure-Retaining Material . . . . . . . . . . . . . . . . . . . . . . . . . . 19NB-2510 Examination of Pressure-Retaining Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19NB-2520 Examination After Quenching and Tempering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19NB-2530 Examination and Repair of Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19NB-2540 Examination and Repair of Forgings and Bars . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

iii

NB-2550 Examination and Repair of Seamless andWelded (Without Filler Metal) Tubular Productsand Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

NB-2560 Examination and Repair of Tubular Products and Fittings Welded With Filler Metal . . 26NB-2570 Examination and Repair of Statically and Centrifugally Cast Products . . . . . . . . . . . . . . . 27NB-2580 Examination of Bolts, Studs, and Nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

NB-2600 Material Organizations’ Quality System Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35NB-2610 Documentation and Maintenance of Quality System Programs . . . . . . . . . . . . . . . . . . . . . 35

NB-2700 Dimensional Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Article NB-3000 Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36NB-3100 General Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36NB-3110 Loading Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36NB-3120 Special Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36NB-3130 General Design Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

NB-3200 Design by Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41NB-3210 Requirements for Acceptability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

NB-3300 Vessel Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41NB-3310 General Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41NB-3320 Design Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41NB-3330 Openings and Reinforcement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41NB-3340 Analysis of Vessels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49NB-3350 Design of Welded Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50NB-3360 Special Vessel Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

NB-3400 Pump Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53NB-3410 General Requirements for Centrifugal Pumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53NB-3420 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54NB-3430 Design Requirements for Centrifugal Pumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54NB-3440 Design of Specific Pump Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

NB-3500 Valve Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58NB-3510 Acceptability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58NB-3520 Design Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60NB-3530 General Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60NB-3540 Design of Pressure-Retaining Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63NB-3550 Cyclic Loading Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76NB-3560 Design Reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77NB-3590 Pressure Relief Valve Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

NB-3600 Piping Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82NB-3610 General Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82NB-3620 Design Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83NB-3630 Piping Design and Analysis Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85NB-3640 Pressure Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86NB-3650 Analysis of Piping Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95NB-3660 Design of Welds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101NB-3670 Special Piping Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101NB-3680 Stress Indices and Flexibility Factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103NB-3690 Dimensional Requirements for Piping Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Article NB-4000 Fabrication and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118NB-4100 General Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118NB-4110 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118NB-4120 Certification of Materials and Fabrication by Certificate Holder . . . . . . . . . . . . . . . . . . . . 118NB-4130 Repair of Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

NB-4200 Forming, Fitting, and Aligning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119NB-4210 Cutting, Forming, and Bending . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119NB-4220 Forming Tolerances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120NB-4230 Fitting and Aligning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122NB-4240 Requirements for Weld Joints in Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

iv

NB-4250 Welding End Transitions — Maximum Envelope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131NB-4300 Welding Qualifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

NB-4310 General Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132NB-4320 Welding Qualifications, Records, and Identifying Stamps . . . . . . . . . . . . . . . . . . . . . . . . . 136NB-4330 General Requirements for Welding Procedure Qualification Tests . . . . . . . . . . . . . . . . . . 137NB-4350 Special Qualification Requirements for Tube-to-Tubesheet Welds . . . . . . . . . . . . . . . . . . 140NB-4360 Qualification Requirements for Welding Specially Designed Welded Seals . . . . . . . . . . . 140

NB-4400 Rules Governing Making, Examining, and Repairing Welds . . . . . . . . . . . . . . . . . . . . . . . . 141NB-4410 Precautions to Be Taken Before Welding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141NB-4420 Rules for Making Welded Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142NB-4430 Welding of Attachments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143NB-4440 Welding of Appurtenances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146NB-4450 Repair of Weld Metal Defects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

NB-4500 Brazing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147NB-4510 Rules for Brazing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147NB-4520 Brazing Qualification Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148NB-4530 Fitting and Aligning of Parts to Be Brazed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149NB-4540 Examination of Brazed Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

NB-4600 Heat Treatment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149NB-4610 Welding Preheat Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149NB-4620 Postweld Heat Treatment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149NB-4630 Heat Treatment of Welds Other Than the Final Postweld Heat Treatment . . . . . . . . . . . 157NB-4650 Heat Treatment After Bending or Forming for Pipes, Pumps, and Valves . . . . . . . . . . . . 157NB-4660 Heat Treatment of Electroslag Welds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157

NB-4700 Mechanical Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157NB-4710 Bolting and Threading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157NB-4720 Bolting Flanged Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157NB-4730 Electrical and Mechanical Penetration Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157

Article NB-5000 Examination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158NB-5100 General Requirements for Examination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158

NB-5110 Methods, Nondestructive Examination Procedures, and Cleaning . . . . . . . . . . . . . . . . . . 158NB-5120 Time of Examination of Welds and Weld Metal Cladding . . . . . . . . . . . . . . . . . . . . . . . . . 158NB-5130 Examination of Weld Edge Preparation Surfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159NB-5140 Examination of Welds and Adjacent Base Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160

NB-5200 Required Examination of Welds for Fabrication and Preservice Baseline . . . . . . . . . . . . 160NB-5210 Category A Vessel Welded Joints and Longitudinal Welded Joints in Other Components 160NB-5220 Category B Vessel Welded Joints and Circumferential Welded Joints in Piping, Pumps, and

Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160NB-5230 Category C Vessel Welded Joints and Similar Welded Joints in Other Components . . . . 160NB-5240 Category D Vessel Welded Joints and Branch and Piping Connections in Other

Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160NB-5250 Weld Metal Buildups to Form Nozzles, Branch and Piping Connections and for Closure

Opening Reinforcement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161NB-5260 Fillet, Partial Penetration, Socket, and Attachment Welded Joints . . . . . . . . . . . . . . . . . . 161NB-5270 Special Welded Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161NB-5280 Preservice Examination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162

NB-5300 Acceptance Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162NB-5320 Radiographic Acceptance Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162NB-5330 Ultrasonic Acceptance Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163NB-5340 Magnetic Particle Acceptance Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163NB-5350 Liquid Penetrant Acceptance Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163NB-5360 Eddy Current Preservice Examination of Installed Nonferromagnetic Steam Generator

Heat Exchanger Tubing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164

v

NB-5370 Visual Acceptance Standards for Brazed Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164NB-5380 Bubble Formation Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164

NB-5400 Final Examination of Vessels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164NB-5410 Examination After Hydrostatic Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164

NB-5500 Qualifications and Certification of Nondestructive Examination Personnel . . . . . . . . . . . 164NB-5510 General Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164NB-5520 Personnel Qualification, Certification, and Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . 164NB-5530 Records . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165

Article NB-6000 Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166NB-6100 General Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166NB-6110 Pressure Testing of Components, Appurtenances, and Systems . . . . . . . . . . . . . . . . . . . . 166NB-6120 Preparation for Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167

NB-6200 Hydrostatic Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167NB-6210 Hydrostatic Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167NB-6220 Hydrostatic Test Pressure Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167

NB-6300 Pneumatic Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168NB-6310 Pneumatic Testing Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168NB-6320 Pneumatic Test Pressure Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168

NB-6400 Pressure Test Gages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168NB-6410 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168

NB-6600 Special Test Pressure Situations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169NB-6610 Components Designed for External Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169NB-6620 Pressure Testing of Combination Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169

Article NB-7000 Overpressure Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170NB-7100 General Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170NB-7110 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170NB-7120 Integrated Overpressure Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170NB-7130 Verification of the Operation of Reclosing Pressure Relief Devices . . . . . . . . . . . . . . . . . 170NB-7140 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170NB-7150 Acceptable Pressure Relief Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171NB-7160 Unacceptable Pressure Relief Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171NB-7170 Permitted Use of Pressure Relief Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171

NB-7200 Overpressure Protection Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172NB-7210 Responsibility for Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172NB-7220 Content of Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172NB-7230 Certification of Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172NB-7240 Review of Report After Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173NB-7250 Filing of Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173

NB-7300 Relieving Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173NB-7310 Expected System Pressure Transient Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173NB-7320 Unexpected System Excess Pressure Transient Conditions . . . . . . . . . . . . . . . . . . . . . . . . 173

NB-7400 Set Pressures of Pressure Relief Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174NB-7410 Set Pressure Limitations for Expected System Pressure Transient Conditions . . . . . . . . 174NB-7420 Set Pressure Limitation for Unexpected System Excess Pressure Transient Conditions 174

NB-7500 Operating and Design Requirements for Pressure Relief Valves . . . . . . . . . . . . . . . . . . . . 174NB-7510 Safety, Safety Relief, and Relief Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174NB-7520 Pilot-Operated Pressure Relief Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175NB-7530 Power-Actuated Pressure Relief Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176NB-7540 Safety Valves and Pilot-Operated Pressure Relief Valves With Auxiliary Actuating

Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176

vi

NB-7550 Alternative Test Media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177NB-7600 Nonreclosing Pressure Relief Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178

NB-7610 Rupture Disk Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178NB-7620 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178

NB-7700 Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179NB-7710 Responsibility for Certification of Pressure Relief Valves . . . . . . . . . . . . . . . . . . . . . . . . . 179NB-7720 Responsibility for Certification of Nonreclosing Pressure Relief Devices . . . . . . . . . . . . . 179NB-7730 Capacity Certification of Pressure Relief Valves — Compressible Fluids . . . . . . . . . . . . . 179NB-7740 Capacity Certification of Pressure Relief Valves — Incompressible Fluids . . . . . . . . . . . 182

NB-7800 Marking, Stamping With Certification Mark, and Data Reports . . . . . . . . . . . . . . . . . . . . . 184NB-7810 Pressure Relief Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184NB-7820 Rupture Disk Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184NB-7830 Certificate of Authorization to Use Certification Mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

Article NB-8000 Nameplates, Stamping With Certification Mark, and Reports . . . . . . . . . . . . . . . . . . 186NB-8100 General Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186

FIGURESNB-1132.2-1 Attachments in the Component Support Load Path That Do Not Perform a

Pressure-Retaining Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3NB-1132.2-2 Attachments That Do Not Perform a Pressure-Retaining Function and Are Not in the

Component Support Load Path (Nonstructural Attachments) . . . . . . . . . . . . . . . . . . . 4NB-1132.2-3 Attachments That Perform a Pressure-Retaining Function . . . . . . . . . . . . . . . . . . . . . . . 5NB-1132.2-4 Attachments Within the Reactor Pressure Vessel (Core Support Structures) That Do Not

Perform a Pressure-Retaining Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6NB-2433.1-1 Weld Metal Delta Ferrite Content . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20NB-2552-1 Axial Propagation of Sound in Tube Wall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25NB-2575.2-1 Typical Pressure-Retaining Parts of Pumps and Valves . . . . . . . . . . . . . . . . . . . . . . . . . . 31NB-3332.2-1 Chart for Determining Value of F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43NB-3338.2(a)-1 Direction of Stress Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45NB-3338.2(a)-2 Nozzle Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46NB-3339.1(b)-1 Examples of Acceptable Transition Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48NB-3339.4-1 Limits of Reinforcing Zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49NB-3351-1 Welded Joint Locations Typical of Categories A, B, C, and D . . . . . . . . . . . . . . . . . . . . . . 50NB-3352-1 Typical Butt Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51NB-3361-1 Category A and B Joints Between Sections of Unequal Thickness . . . . . . . . . . . . . . . . . . 53NB-3423-1 Typical Single Volute Casing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54NB-3423-2 Typical Double Volute Casing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54NB-3433.4-1 Minimum Tangential Inlet and Outlet Wall Thickness . . . . . . . . . . . . . . . . . . . . . . . . . . . 55NB-3441.1-1 Type A Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56NB-3441.1-2 Type A Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56NB-3441.2-1 Type B Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56NB-3441.3-1 Type C Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57NB-3441.3-2 Type C Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57NB-3441.4(a)-1 Type D Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58NB-3441.5-1 Type E Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58NB-3441.6(a)-1 Type F Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58NB-3544.1(a)-1 Fillets and Corners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64NB-3544.1(c)-1 Ring Grooves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64NB-3544.3-1 Lugs and Protuberances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65NB-3544.7-1 Flat Wall Limitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66NB-3545.1(a)-1 Pressure Area Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67NB-3545.2(a)-1 Critical Sections of Valve Bodies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

vii

NB-3545.2(c)-1 Model for Determining Secondary Stress in Valve Crotch Region . . . . . . . . . . . . . . . . . . 72NB-3545.2(c)-3 Thermal Stress Index Versus Thickness Continuity Run or Branch . . . . . . . . . . . . . . . . 73NB-3545.2(c)-4 Secondary Stress Index Versus Thickness Discontinuity Run or Branch . . . . . . . . . . . . 74NB-3545.2(c)-5 C4 Versus Te1/te . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75NB-3545.2(c)-6 Stress Index for Thermal Fatigue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75NB-3591.1-1 Typical Pressure Relief Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79NB-3591.1-2 Typical Pressure Relief and Safety Relief Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80NB-3594.3-1 Valve Nozzle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81NB-3622-1 Examples of Reversing and Nonreversing Dynamic Loads . . . . . . . . . . . . . . . . . . . . . . . 84NB-3643.3(a)-1 Branch Connection Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89NB-3643.3(a)-2 Typical Reinforcement of Openings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90NB-3643.3(a)-3 Typical Reinforced Extruded Outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91NB-3644(b)-1 Miter Joint Geometry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93NB-3647.2-1 Types of Permanent Blanks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94NB-3653.2(b)-1 Decomposition of Temperature Distribution Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97NB-3683.1(c)-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106NB-3683.1(d)-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107NB-3683.6-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110NB-3684-1 Direction of Stress Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112NB-3685.2-1 Elbow Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115NB-3686.1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115NB-3686.2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116NB-3686.5-1 Branch Connections in Straight Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116NB-3686.6-1 Reducers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117NB-4221.1-1 Maximum Difference in Cross-Sectional Diameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121NB-4221.2(a)-1 Maximum Permissible Deviation e From a True Circular Form . . . . . . . . . . . . . . . . . . . 122NB-4221.2(a)-2 Maximum Arc Length for Determining Plus or Minus Deviation . . . . . . . . . . . . . . . . . . 123NB-4233(a)-1 Butt Weld Alignment and Mismatch Tolerances for Unequal I.D. and O.D. When Com-

ponents Are Welded From One Side and Fairing Is Not Performed . . . . . . . . . . . . . . 125NB-4243-1 Acceptable Full Penetration Weld Details for Category C Joints (NB-3352.3) . . . . . . . . 126NB-4244(a)-1 Nozzles Joined by Full Penetration Butt Welds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127NB-4244(b)-1 Nozzles Joined by Full Penetration Corner Welds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128NB-4244(c)-1 Deposited Weld Metal Used as Reinforcement of Openings for Nozzles . . . . . . . . . . . . 129NB-4244(d)-1 Partial Penetration Nozzles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130NB-4244(d)-2 Partial Penetration Nozzle for Coaxial Cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131NB-4244(e)-1 Oblique Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132NB-4246(a)-1 Typical Piping Branch Connections Joined by Full Penetration Welds . . . . . . . . . . . . . . 133NB-4246(b)-1 Typical Piping Branch Connections Joined by a Fillet Weld or a Partial Penetration

Weld . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134NB-4250-1 Welding End Transitions — Maximum Envelope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135NB-4250-2 Component to Pipe Weld . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136NB-4250-3 Pipe to Pipe Weld . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136NB-4427-1 Fillet and Socket Weld Details and Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144NB-4433-1 Types of Attachment Welds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145NB-4440-1 Appurtenance Weld Joint Details, NPS 2 (DN 50) and Smaller . . . . . . . . . . . . . . . . . . . . 147NB-4511-1 Brazed Connections for Appurtenances and Piping, NPS 1 (DN 25) and Smaller . . . . . 148NB-4622.9(d)(1)-1 Dissimilar Metal Repair Cavity Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

TABLESNB-2332(a)-1 Required Cv Values for Piping, Pumps, and Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14NB-2333-1 Required Cv Values for Bolting Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15NB-2432.1-1 Sampling of Welding Materials for Chemical Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18NB-2432.2(a)-1 Chemical Analysis for Reactor Vessel Welding Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18NB-2432.2(a)-2 Chemical Analysis for Welding Material for Other Than Reactor Vessel Welds . . . . . . . . . 19NB-2571-1 Required Examinations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28NB-3338.2(c)-1 Stress Indices for Nozzles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

viii

NB-3339.3-1 Required Minimum Reinforcing Area, Ar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48NB-3339.7(c)-1 Stress Indices for Internal Pressure Loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49NB-3641.1(a)-1 Values of A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87NB-3681(a)-1 Stress Indices for Use With Equations in NB-3650 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104NB-3685.1-1 Curved Pipe or Welding End Elbows, Internal Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113NB-3685.1-2 Curved Pipe or Welding End Elbows, Moment Loading ( ) . . . . . . . . . . . . . . . . . . . 114NB-4232-1 Maximum Allowable Offset in Final Welded Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123NB-4524-1 Maximum Design Temperatures for Brazing Filler Metal . . . . . . . . . . . . . . . . . . . . . . . . . . . 149NB-4622.1-1 Mandatory Requirements for Postweld Heat Treatment of Welds . . . . . . . . . . . . . . . . . . . . 151NB-4622.4(c)-1 Alternative Holding Temperatures and Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152NB-4622.7(b)-1 Exemptions to Mandatory PWHT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153NB-5111-1 Thickness, IQI Designations, Essential Holes, and Wire Diameters . . . . . . . . . . . . . . . . . . . . 159

ENDNOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

ix

ð17Þ LIST OF SECTIONSSECTIONSI Rules for Construction of Power Boilers

II Materials• Part A — Ferrous Material Specifications• Part B — Nonferrous Material Specifications• Part C — Specifications for Welding Rods, Electrodes, and Filler Metals• Part D — Properties (Customary)• Part D — Properties (Metric)

III Rules for Construction of Nuclear Facility Components• Subsection NCA — General Requirements for Division 1 and Division 2• Appendices• Division 1*

– Subsection NB — Class 1 Components– Subsection NC — Class 2 Components– Subsection ND — Class 3 Components– Subsection NE — Class MC Components– Subsection NF — Supports– Subsection NG — Core Support Structures

• Division 2 — Code for Concrete Containments• Division 3 — Containment Systems for Transportation and Storage of Spent Nuclear Fuel and High-LevelRadioactive Material

• Division 5 — High Temperature Reactors

IV Rules for Construction of Heating Boilers

V Nondestructive Examination

VI Recommended Rules for the Care and Operation of Heating Boilers

VII Recommended Guidelines for the Care of Power Boilers

VIII Rules for Construction of Pressure Vessels• Division 1• Division 2 — Alternative Rules• Division 3 — Alternative Rules for Construction of High Pressure Vessels

IX Welding, Brazing, and Fusing Qualifications

X Fiber-Reinforced Plastic Pressure Vessels

XI Rules for Inservice Inspection of Nuclear Power Plant Components

XII Rules for Construction and Continued Service of Transport Tanks

* The 2015 Edition of Section III was the last edition in which Section III, Division 1, Subsection NH, Class 1 Components in Elevated Tem-perature Service, was published. The requirements located within Subsection NH were moved to Section III, Division 5, Subsection HB, SubpartB for the elevated temperature construction of Class A components.

x

INTERPRETATIONS

Interpretations are issued in real time in ASME’s Interpretations Database at http://go.asme.org/Interpretations. His-torical BPVC interpretations may also be found in the Database.

CODE CASES

The Boiler and Pressure Vessel Code committees meet regularly to consider proposed additions and revisions to theCode and to formulate Cases to clarify the intent of existing requirements or provide, when the need is urgent, rules formaterials or constructions not covered by existing Code rules. Those Cases that have been adopted will appear in theappropriate 2017 Code Cases book: “Boilers and Pressure Vessels” or “Nuclear Components.” Supplements will be sentor made available automatically to the purchasers of the Code Cases books up to the publication of the 2019 Code.

xi

FOREWORD*

In 1911, The American Society of Mechanical Engineers established the Boiler and Pressure Vessel Committee to for-mulate standard rules for the construction of steam boilers and other pressure vessels. In 2009, the Boiler and PressureVessel Committee was superseded by the following committees:(a) Committee on Power Boilers (I)(b) Committee on Materials (II)(c) Committee on Construction of Nuclear Facility Components (III)(d) Committee on Heating Boilers (IV)(e) Committee on Nondestructive Examination (V)(f) Committee on Pressure Vessels (VIII)(g) Committee on Welding, Brazing, and Fusing (IX)(h) Committee on Fiber-Reinforced Plastic Pressure Vessels (X)(i) Committee on Nuclear Inservice Inspection (XI)(j) Committee on Transport Tanks (XII)(k) Technical Oversight Management Committee (TOMC)Where reference is made to “the Committee” in this Foreword, each of these committees is included individually and

collectively.The Committee’s function is to establish rules of safety relating only to pressure integrity, which govern the

construction** of boilers, pressure vessels, transport tanks, and nuclear components, and the inservice inspection of nu-clear components and transport tanks. The Committee also interprets these rules when questions arise regarding theirintent. The technical consistency of the Sections of the Code and coordination of standards development activities of theCommittees is supported and guided by the Technical Oversight Management Committee. This Code does not addressother safety issues relating to the construction of boilers, pressure vessels, transport tanks, or nuclear components, orthe inservice inspection of nuclear components or transport tanks. Users of the Code should refer to the pertinent codes,standards, laws, regulations, or other relevant documents for safety issues other than those relating to pressure integ-rity. Except for Sections XI and XII, and with a few other exceptions, the rules do not, of practical necessity, reflect thelikelihood and consequences of deterioration in service related to specific service fluids or external operating environ-ments. In formulating the rules, the Committee considers the needs of users, manufacturers, and inspectors of pressurevessels. The objective of the rules is to afford reasonably certain protection of life and property, and to provide a marginfor deterioration in service to give a reasonably long, safe period of usefulness. Advancements in design and materialsand evidence of experience have been recognized.This Code contains mandatory requirements, specific prohibitions, and nonmandatory guidance for construction ac-

tivities and inservice inspection and testing activities. The Code does not address all aspects of these activities and thoseaspects that are not specifically addressed should not be considered prohibited. The Code is not a handbook and cannotreplace education, experience, and the use of engineering judgment. The phrase engineering judgment refers to technicaljudgments made by knowledgeable engineers experienced in the application of the Code. Engineering judgments mustbe consistent with Code philosophy, and such judgments must never be used to overrule mandatory requirements orspecific prohibitions of the Code.The Committee recognizes that tools and techniques used for design and analysis change as technology progresses

and expects engineers to use good judgment in the application of these tools. The designer is responsible for complyingwith Code rules and demonstrating compliance with Code equations when such equations are mandatory. The Codeneither requires nor prohibits the use of computers for the design or analysis of components constructed to the

* The information contained in this Foreword is not part of this American National Standard (ANS) and has not been processed in accordancewith ANSI's requirements for an ANS. Therefore, this Foreword may contain material that has not been subjected to public review or a con-sensus process. In addition, it does not contain requirements necessary for conformance to the Code.

** Construction, as used in this Foreword, is an all-inclusive term comprising materials, design, fabrication, examination, inspection, testing,certification, and pressure relief.

xii

requirements of the Code. However, designers and engineers using computer programs for design or analysis are cau-tioned that they are responsible for all technical assumptions inherent in the programs they use and the application ofthese programs to their design.

The rules established by the Committee are not to be interpreted as approving, recommending, or endorsing any pro-prietary or specific design, or as limiting in any way the manufacturer’s freedom to choose any method of design or anyform of construction that conforms to the Code rules.

The Committee meets regularly to consider revisions of the rules, new rules as dictated by technological development,Code Cases, and requests for interpretations. Only the Committee has the authority to provide official interpretations ofthis Code. Requests for revisions, new rules, Code Cases, or interpretations shall be addressed to the Secretary in writingand shall give full particulars in order to receive consideration and action (see Submittal of Technical Inquiries to theBoiler and Pressure Vessel Standards Committees). Proposed revisions to the Code resulting from inquiries will be pre-sented to the Committee for appropriate action. The action of the Committee becomes effective only after confirmationby ballot of the Committee and approval by ASME. Proposed revisions to the Code approved by the Committee are sub-mitted to the American National Standards Institute (ANSI) and published at http://go.asme.org/BPVCPublicReview toinvite comments from all interested persons. After public review and final approval by ASME, revisions are published atregular intervals in Editions of the Code.

The Committee does not rule on whether a component shall or shall not be constructed to the provisions of the Code.The scope of each Section has been established to identify the components and parameters considered by the Committeein formulating the Code rules.

Questions or issues regarding compliance of a specific component with the Code rules are to be directed to the ASMECertificate Holder (Manufacturer). Inquiries concerning the interpretation of the Code are to be directed to the Commit-tee. ASME is to be notified should questions arise concerning improper use of an ASME Certification Mark.

When required by context in this Section, the singular shall be interpreted as the plural, and vice versa, and the fem-inine, masculine, or neuter gender shall be treated as such other gender as appropriate.

xiii

STATEMENT OF POLICY ON THE USE OF THE CERTIFICATIONMARK AND CODE AUTHORIZATION IN ADVERTISING

ASME has established procedures to authorize qualified organizations to perform various activities in accordancewith the requirements of the ASME Boiler and Pressure Vessel Code. It is the aim of the Society to provide recognitionof organizations so authorized. An organization holding authorization to perform various activities in accordance withthe requirements of the Code may state this capability in its advertising literature.Organizations that are authorized to use the Certification Mark for marking items or constructions that have been

constructed and inspected in compliance with the ASME Boiler and Pressure Vessel Code are issued Certificates ofAuthorization. It is the aim of the Society to maintain the standing of the Certification Mark for the benefit of the users,the enforcement jurisdictions, and the holders of the Certification Mark who comply with all requirements.Based on these objectives, the following policy has been established on the usage in advertising of facsimiles of the

Certification Mark, Certificates of Authorization, and reference to Code construction. The American Society of MechanicalEngineers does not “approve,” “certify,” “rate,” or “endorse” any item, construction, or activity and there shall be no state-ments or implications that might so indicate. An organization holding the Certification Mark and/or a Certificate ofAuthorization may state in advertising literature that items, constructions, or activities “are built (produced or per-formed) or activities conducted in accordance with the requirements of the ASME Boiler and Pressure Vessel Code,”or “meet the requirements of the ASME Boiler and Pressure Vessel Code.”An ASME corporate logo shall not be usedby any organization other than ASME.The Certification Mark shall be used only for stamping and nameplates as specifically provided in the Code. However,

facsimiles may be used for the purpose of fostering the use of such construction. Such usage may be by an association ora society, or by a holder of the Certification Mark who may also use the facsimile in advertising to show that clearly spe-cified items will carry the Certification Mark. General usage is permitted only when all of a manufacturer’s items areconstructed under the rules.

STATEMENT OF POLICY ON THE USE OF ASME MARKING TOIDENTIFY MANUFACTURED ITEMS

The ASME Boiler and Pressure Vessel Code provides rules for the construction of boilers, pressure vessels, and nuclearcomponents. This includes requirements for materials, design, fabrication, examination, inspection, and stamping. Itemsconstructed in accordance with all of the applicable rules of the Code are identified with the official Certification Markdescribed in the governing Section of the Code.Markings such as “ASME,” “ASME Standard,” or any other marking including “ASME” or the Certification Mark shall not

be used on any item that is not constructed in accordance with all of the applicable requirements of the Code.Items shall not be described on ASME Data Report Forms nor on similar forms referring to ASME that tend to imply

that all Code requirements have been met when, in fact, they have not been. Data Report Forms covering items not fullycomplying with ASME requirements should not refer to ASME or they should clearly identify all exceptions to the ASMErequirements.

xiv

ð17ÞSUBMITTAL OF TECHNICAL INQUIRIES TO THE BOILER ANDPRESSURE VESSEL STANDARDS COMMITTEES

1 INTRODUCTION

(a) The following information provides guidance to Code users for submitting technical inquiries to the applicableBoiler and Pressure Vessel (BPV) Standards Committee (hereinafter referred to as the Committee). See the guidelineson approval of new materials under the ASME Boiler and Pressure Vessel Code in Section II, Part D for requirements forrequests that involve adding new materials to the Code. See the guidelines on approval of new welding and brazing ma-terials in Section II, Part C for requirements for requests that involve adding new welding and brazing materials (“con-sumables”) to the Code.

Technical inquiries can include requests for revisions or additions to the Code requirements, requests for Code Cases,or requests for Code Interpretations, as described below:

(1) Code Revisions. Code revisions are considered to accommodate technological developments, to address admin-istrative requirements, to incorporate Code Cases, or to clarify Code intent.

(2) Code Cases. Code Cases represent alternatives or additions to existing Code requirements. Code Cases are writ-ten as a Question and Reply, and are usually intended to be incorporated into the Code at a later date. When used, CodeCases prescribe mandatory requirements in the same sense as the text of the Code. However, users are cautioned thatnot all regulators, jurisdictions, or Owners automatically accept Code Cases. The most common applications for CodeCases are as follows:

(-a) to permit early implementation of an approved Code revision based on an urgent need(-b) to permit use of a new material for Code construction(-c) to gain experience with new materials or alternative requirements prior to incorporation directly into the

Code(3) Code Interpretations

(-a) Code Interpretations provide clarification of the meaning of existing requirements in the Code and are pre-sented in Inquiry and Reply format. Interpretations do not introduce new requirements.

(-b) If existing Code text does not fully convey the meaning that was intended, or conveys conflicting require-ments, and revision of the requirements is required to support the Interpretation, an Intent Interpretation will be issuedin parallel with a revision to the Code.

(b) Code requirements, Code Cases, and Code Interpretations established by the Committee are not to be consideredas approving, recommending, certifying, or endorsing any proprietary or specific design, or as limiting in any way thefreedom of manufacturers, constructors, or Owners to choose any method of design or any form of construction thatconforms to the Code requirements.

(c) Inquiries that do not comply with the following guidance or that do not provide sufficient information for the Com-mittee’s full understanding may result in the request being returned to the Inquirer with no action.

2 INQUIRY FORMAT

Submittals to the Committee should include the following information:(a) Purpose. Specify one of the following:(1) request for revision of present Code requirements(2) request for new or additional Code requirements(3) request for Code Case(4) request for Code Interpretation

(b) Background. The Inquirer should provide the information needed for the Committee’s understanding of the In-quiry, being sure to include reference to the applicable Code Section, Division, Edition, Addenda (if applicable), para-graphs, figures, and tables. Preferably, the Inquirer should provide a copy of, or relevant extracts from, the specificreferenced portions of the Code.

xv

(c) Presentations. The Inquirer may desire to attend or be asked to attend a meeting of the Committee to make a for-mal presentation or to answer questions from the Committee members with regard to the Inquiry. Attendance at a BPVStandards Committee meeting shall be at the expense of the Inquirer. The Inquirer’s attendance or lack of attendance ata meeting will not be used by the Committee as a basis for acceptance or rejection of the Inquiry by the Committee. How-ever, if the Inquirer’s request is unclear, attendance by the Inquirer or a representative may be necessary for the Com-mittee to understand the request sufficiently to be able to provide an Interpretation. If the Inquirer desires to make apresentation at a Committee meeting, the Inquirer should provide advance notice to the Committee Secretary, to ensuretime will be allotted for the presentation in the meeting agenda. The Inquirer should consider the need for additionalaudiovisual equipment that might not otherwise be provided by the Committee. With sufficient advance notice to theCommittee Secretary, such equipment may be made available.

3 CODE REVISIONS OR ADDITIONS

Requests for Code revisions or additions should include the following information:(a) Requested Revisions or Additions. For requested revisions, the Inquirer should identify those requirements of the

Code that they believe should be revised, and should submit a copy of, or relevant extracts from, the appropriate require-ments as they appear in the Code, marked up with the requested revision. For requested additions to the Code, the In-quirer should provide the recommended wording and should clearly indicate where they believe the additions should belocated in the Code requirements.(b) Statement of Need. The Inquirer should provide a brief explanation of the need for the revision or addition.(c) Background Information. The Inquirer should provide background information to support the revision or addition,

including any data or changes in technology that form the basis for the request, that will allow the Committee to ade-quately evaluate the requested revision or addition. Sketches, tables, figures, and graphs should be submitted, as appro-priate. The Inquirer should identify any pertinent portions of the Code that would be affected by the revision or additionand any portions of the Code that reference the requested revised or added paragraphs.

4 CODE CASES

Requests for Code Cases should be accompanied by a statement of need and background information similar to thatdescribed in 3(b) and 3(c), respectively, for Code revisions or additions. The urgency of the Code Case (e.g., project un-derway or imminent, new procedure) should be described. In addition, it is important that the request is in connectionwith equipment that will bear the Certification Mark, with the exception of Section XI applications. The proposed CodeCase should identify the Code Section and Division, and should be written as a Question and a Reply, in the same formatas existing Code Cases. Requests for Code Cases should also indicate the applicable Code Editions and Addenda (if ap-plicable) to which the requested Code Case applies.

5 CODE INTERPRETATIONS

(a) Requests for Code Interpretations should be accompanied by the following information:(1) Inquiry. The Inquirer should propose a condensed and precise Inquiry, omitting superfluous background infor-

mation and, when possible, composing the Inquiry in such a way that a “yes” or a “no” Reply, with brief limitations orconditions, if needed, can be provided by the Committee. The proposed question should be technically and editoriallycorrect.

(2) Reply. The Inquirer should propose a Reply that clearly and concisely answers the proposed Inquiry question.Preferably, the Reply should be “yes” or “no,” with brief limitations or conditions, if needed.

(3) Background Information. The Inquirer should provide any need or background information, such as described in3(b) and 3(c), respectively, for Code revisions or additions, that will assist the Committee in understanding the proposedInquiry and Reply.If the Inquirer believes a revision of the Code requirements would be helpful to support the Interpretation, the In-

quirer may propose such a revision for consideration by the Committee. In most cases, such a proposal is not necessary.(b) Requests for Code Interpretations should be limited to an Interpretation of a particular requirement in the Code or

in a Code Case. Except with regard to interpreting a specific Code requirement, the Committee is not permitted to con-sider consulting-type requests such as the following:

(1) a review of calculations, design drawings, welding qualifications, or descriptions of equipment or parts to de-termine compliance with Code requirements

xvi

(2) a request for assistance in performing any Code-prescribed functions relating to, but not limited to, materialselection, designs, calculations, fabrication, inspection, pressure testing, or installation

(3) a request seeking the rationale for Code requirements

6 SUBMITTALS

(a) Submittal. Requests for Code Interpretation should preferably be submitted through the online Interpretation Sub-mittal Form. The form is accessible at http://go.asme.org/InterpretationRequest. Upon submittal of the form, the In-quirer will receive an automatic e-mail confirming receipt. If the Inquirer is unable to use the online form, theInquirer may mail the request to the following address:

SecretaryASME Boiler and Pressure Vessel CommitteeTwo Park AvenueNew York, NY 10016-5990

All other Inquiries should be mailed to the Secretary of the BPV Committee at the address above. Inquiries are unlikelyto receive a response if they are not written in clear, legible English. They must also include the name of the Inquirer andthe company they represent or are employed by, if applicable, and the Inquirer’s address, telephone number, fax num-ber, and e-mail address, if available.

(b) Response. The Secretary of the appropriate Committee will provide a written response, via letter or e-mail, as ap-propriate, to the Inquirer, upon completion of the requested action by the Committee. Inquirers may track the status oftheir Interpretation Request at http://go.asme.org/Interpretations.

xvii

ð17Þ PERSONNELASME Boiler and Pressure Vessel Standards Committees,

Subgroups, and Working GroupsJanuary 1, 2017

TECHNICAL OVERSIGHT MANAGEMENT COMMITTEE (TOMC)

T. P. Pastor, ChairS. C. Roberts, Vice ChairJ. S. Brzuszkiewicz, Staff SecretaryR. W. BarnesR. J. BasileT. L. BedeauxD. L. BergerD. A. CanonicoA. ChaudouetD. B. DeMichaelR. P. DeublerP. D. EdwardsJ. G. FeldsteinR. E. GimpleT. E. HansenG. W. Hembree

J. F. HenryR. S. Hill IIIG. G. KarcherW. M. LundyG. C. ParkM. D. RanaR. F. Reedy, Sr.B. W. RobertsF. J. Schaaf, Jr.B. F. ShelleyW. J. SperkoD. SrnicR. W. SwayneC. WithersJ. E. Batey, Contributing Member

HONORARY MEMBERS (MAIN COMMITTEE)

F. P. BartonT. M. CullenG. E. FeigelO. F. HeddenM. H. JawadA. J. Justin

W. G. KnechtJ. LeCoffT. G. McCartyG. C. MillmanR. A. MoenR. F. Reedy, Sr.

ADMINISTRATIVE COMMITTEE

T. P. Pastor, ChairS. C. Roberts, Vice ChairJ. S. Brzuszkiewicz, Staff SecretaryR. W. BarnesT. L. BedeauxD. L. BergerG. W. Hembree

J. F. Henry

R. S. Hill III

G. C. Park

M. D. Rana

B. F. Shelley

W. J. Sperko

MARINE CONFERENCE GROUP

H. N. Patel, ChairJ. S. Brzuszkiewicz, Staff SecretaryJ. G. Hungerbuhler, Jr.

G. PallichadathN. ProkopukJ. D. Reynolds

CONFERENCE COMMITTEE

D. A. Douin — Ohio, SecretaryM. J. Adams — Ontario, CanadaJ. T. Amato — MinnesotaW. Anderson — MississippiR. D. Austin — ArizonaR. J. Brockman — MissouriJ. H. Burpee — MaineM. Byrum — AlabamaC. B. Cantrell — NebraskaS. Chapman — TennesseeD. C. Cook — CaliforniaB. J. Crawford — GeorgiaE. L. Creaser — New Brunswick,Canada

J. J. Dacanay — HawaiiC. Dautrich — North CarolinaR. Delury — Manitoba, CanadaP. L. Dodge— Nova Scotia, CanadaD. Eastman — Newfoundland andLabrador, Canada

J. J. Esch — DelawareA. G. Frazier — FloridaT. J. Granneman II — OklahomaD. R. Hannon — ArkansasE. G. Hilton — VirginiaC. Jackson — City of Detroit,Michigan

M. L. Jordan — KentuckyE. Kawa, Jr. — MassachusettsA. Khssassi — Quebec, CanadaJ. Klug — City of Milwaukee,Wisconsin

K. J. Kraft — MarylandK. S. Lane — AlaskaL. C. Leet — City of Seattle,Washington

J. LeSage, Jr. — LouisianaA. M. Lorimor — South DakotaM. Mailman — NorthwestTerritories, Canada

D. E. Mallory — New HampshireW. McGivney — City of New York,New York

S. V. Nelson — ColoradoA. K. Oda — WashingtonM. Poehlmann — Alberta, CanadaJ. F. Porcella — West VirginiaC. F. Reyes — City of Los Angeles,California

M. J. Ryan — City of Chicago,Illinois

D. Sandfoss — NevadaM. H. Sansone — New YorkA. S. Scholl — British Columbia,Canada

T. S. Seime — North DakotaC. S. Selinger — Saskatchewan,Canada

J. E. Sharier — OhioN. Smith — PennsylvaniaR. Spiker — North CarolinaD. J. Stenrose — MichiganR. J. Stimson II — KansasR. K. Sturm — UtahS. R. Townsend — Prince EdwardIsland, Canada

R. D. Troutt — TexasM. C. Vogel — IllinoisT. Waldbillig — WisconsinM. Washington — New Jersey

INTERNATIONAL INTEREST REVIEW GROUP

V. FelixY.-G. KimS. H. LeongW. LinO. F. Manafa

C. MinuT. S. G. NarayannenY.-W. ParkA. R. R. NogalesP. Williamson

xviii

COMMITTEE ON POWER BOILERS (BPV I)

D. L. Berger, ChairR. E. McLaughlin, Vice ChairU. D’Urso, Staff SecretaryJ. L. ArnoldD. A. CanonicoK. K. ColemanP. D. EdwardsJ. G. FeldsteinG. W. GalanesT. E. HansenJ. F. HenryJ. S. HunterG. B. KomoraW. L. LowryF. MassiL. MoedingerP. A. Molvie

Y. OishiE. M. OrtmanJ. T. PillowM. SlaterJ. M. TanzoshD. E. TompkinsD. E. TuttleJ. VattappillyR. V. WielgoszinskiF. ZellerY. Li, DelegateH. Michael, DelegateB. W. Roberts, ContributingMember

D. N. French, Honorary MemberT. C. McGough, Honorary MemberR. L. Williams, Honorary Member

Subgroup on Design (BPV I)

J. Vattappilly, ChairD. I. Anderson, SecretaryD. DeweesH. A. Fonzi, Jr.J. P. GlaspieG. B. Komora

P. A. MolvieL. S. TsaiM. WadkinsonC. F. Jeerings, Contributing MemberS. V. Torkildson, ContributingMember

Subgroup on Fabrication and Examination (BPV I)

J. L. Arnold, ChairP. BeckerD. L. BergerS. FincherG. W. GalanesP. F. GilstonJ. Hainsworth

T. E. HansenC. T. McDarisR. E. McLaughlinR. J. NewellY. OishiJ. T. PillowR. V. Wielgoszinski

Subgroup on General Requirements and Piping (BPV I)

E. M. Ortman, ChairD. Tompkins, Vice ChairF. Massi, SecretaryP. BeckerD. L. BergerP. D. EdwardsG. W. GalanesT. E. HansenM. LemmonsW. L. Lowry

R. E. McLaughlinB. J. MollitorJ. T. PillowD. E. TuttleM. WadkinsonR. V. WielgoszinskiC. F. Jeerings, Contributing MemberS. V. Torkildson, ContributingMember

R. Uebel, Contributing Member

Subgroup on Locomotive Boilers (BPV I)

L. Moedinger, ChairS. M. Butler, SecretaryP. BoschanJ. R. BraunR. C. Franzen, Jr.G. W. GalanesD. W. Griner

S. D. Jackson

M. A. Janssen

S. A. Lee

G. M. Ray

R. B. Stone

M. W. Westland

Subgroup on Materials (BPV I)

G. W. Galanes, ChairJ. F. Henry, Vice ChairM. Lewis, SecretaryS. H. BowesD. A. CanonicoK. K. ColemanK. L. HayesJ. S. HunterO. X. Li

F. Masuyama

D. W. Rahoi

J. M. Tanzosh

J. Vattappilly

F. Zeller

M. Gold, Contributing Member

B. W. Roberts, ContributingMember

Subgroup on Solar Boilers (BPV I)

E. M. Ortman, ChairR. E. Hearne, SecretaryH. A. Fonzi, Jr.G. W. GalanesJ. S. Hunter

P. JenningsD. J. KozaF. MassiS. V. Torkildson, ContributingMember

Germany International Working Group (BPV I)

H. Michael, ChairH. P. Schmitz, SecretaryM. BremickerP. ChavdarovB. DaumeJ. FleischfresserE. HelmholdtR. KauerS. Krebs

T. LudwigR. A. MeyersF. MiunskeP. PaluszkiewiczH. SchroederA. SpangenbergM. SykoraJ. Henrichsmeyer, ContributingMember

India International Working Group (BPV I)

U. Revisanakaran, ChairA. J. Patil, Vice ChairH. Dalal, SecretaryK. AsokkumarM. R. KalahasthiI. KalyanasundaramA. R. Patil

G. V. S. Rao

M. G. Rao

N. Satheesan

G. U. Shanker

D. Shrivastava

S. Venkataramana

Task Group on Modernization of BPVC Section I

D. I. Anderson, ChairU. D’Urso, Staff SecretaryJ. L. ArnoldD. DeweesG. W. GalanesJ. P. GlaspieT. E. HansenJ. F. Henry

R. E. McLaughlin

P. A. Molvie

E. M. Ortman

J. T. Pillow

B. W. Roberts

D. E. Tuttle

J. Vattappilly

xix

COMMITTEE ON MATERIALS (BPV II)

J. F. Henry, ChairJ. F. Grubb, Vice ChairC. E. O’Brien, Staff SecretaryF. AbeA. AppletonJ. CameronD. A. CanonicoA. ChaudouetD. B. DenisJ. R. FouldsD. W. GandyM. H. GilkeyJ. A. HallK. M. HottleM. IshikawaO. X. LiF. MasuyamaR. K. NanstadK. E. OrieD. W. RahoiE. ShapiroM. J. SlaterR. C. SutherlinR. W. Swindeman

J. M. TanzoshR. G. YoungF. ZellerO. Oldani, DelegateH. D. Bushfield, ContributingMember

M. Gold, Contributing MemberW. Hoffelner, Contributing MemberM. Katcher, Contributing MemberM. L. Nayyar, Contributing MemberE. G. Nisbett, Contributing MemberD. T. Peters, Contributing MemberB. W. Roberts, ContributingMember

E. Thomas, Contributing MemberE. Upitis, Contributing MemberT. M. Cullen, Honorary MemberW. D. Edsall, Honorary MemberG. C. Hsu, Honorary MemberR. A. Moen, Honorary MemberC. E. Spaeder, Jr., HonoraryMember

A. W. Zeuthen, Honorary Member

Executive Committee (BPV II)

J. F. Henry, ChairC. E. O’Brien, Staff SecretaryA. AppletonA. ChaudouetJ. R. FouldsM. Gold

J. F. GrubbR. W. MikitkaB. W. RobertsM. J. SlaterR. C. SutherlinR. W. Swindeman

Subgroup on External Pressure (BPV II)

R. W. Mikitka, ChairD. L. Kurle, Vice ChairJ. A. A. Morrow, SecretaryL. F. CampbellH. ChenD. S. GriffinJ. F. GrubbS. Guzey

J. R. Harris III

M. H. Jawad

C. R. Thomas

M. Wadkinson

M. Katcher, Contributing Member

C. H. Sturgeon, ContributingMember

Subgroup on Ferrous Specifications (BPV II)

A. Appleton, ChairK. M. Hottle, Vice ChairP. Wittenbach, SecretaryH. ChenB. M. DingmanM. J. DosdourianO. ElkadimJ. D. FritzM. GoldT. GrahamJ. M. GrockiJ. F. GrubbJ. Gundlach

C. HydeD. S. JanikowskiL. J. LavezziS. G. LeeW. C. MackA. S. MelilliK. E. OrieJ. ShickE. UpitisJ. D. WilsonR. ZawieruchaE. G. Nisbett, Contributing Member

Subgroup on International Material Specifications (BPV II)

A. Chaudouet, ChairA. R. Nywening, Vice ChairT. F. Miskell, SecretaryD. A. CanonicoH. ChenA. F. GarbolevskyD. O. Henry

M. IshikawaO. X. LiW. M. LundyE. UpitisF. ZellerO. Oldani, DelegateH. Lorenz, Contributing Member

Subgroup on Nonferrous Alloys (BPV II)

R. C. Sutherlin, ChairM. H. Gilkey, Vice ChairJ. CallandD. B. DenisJ. F. GrubbT. HartmanA. HeinoM. KatcherJ. A. McMasterL. Paul

D. W. Rahoi

W. Ren

J. Robertson

E. Shapiro

M. H. Skillingberg

J. Weritz

R. Wright

S. Yem

D. T. Peters, Contributing Member

Subgroup on Physical Properties (BPV II)

J. F. Grubb, ChairD. B. Denis, Vice ChairE. Shapiro

H. D. Bushfield, ContributingMember

Subgroup on Strength, Ferrous Alloys (BPV II)

M. J. Slater, ChairS. W. Knowles, SecretaryF. AbeD. A. CanonicoA. Di RienzoJ. R. FouldsJ. A. HallJ. F. HenryK. KimuraF. MasuyamaT. Ono

M. OrtolaniD. W. RahoiM. S. SheltonR. W. SwindemanJ. M. TanzoshR. G. YoungF. ZellerM. Gold, Contributing MemberM. Nair, Contributing MemberB. W. Roberts, ContributingMember

Subgroup on Strength of Weldments (BPV II & BPV IX)

W. F. Newell, Jr., ChairS. H. BowesK. K. ColemanM. DenaultP. D. FlennerJ. R. FouldsD. W. GandyM. GhahremaniK. L. Hayes

J. F. HenryE. LieblJ. PensoD. W. RahoiB. W. RobertsW. J. SperkoJ. P. Swezy, Jr.J. M. TanzoshM. Gold, Contributing Member

Working Group on Materials Database (BPV II)

R. W. Swindeman, ChairC. E. O’Brien, Staff SecretaryF. AbeJ. R. FouldsJ. F. HenryM. J. SlaterR. C. SutherlinD. Andrei, Contributing Member

J. L. Arnold, Contributing MemberJ. Grimes, Contributing MemberW. Hoffelner, Contributing MemberT. Lazar, Contributing MemberD. T. Peters, Contributing MemberW. Ren, Contributing MemberB. W. Roberts, ContributingMember

xx

Working Group on Creep Strength Enhanced Ferritic Steels (BPV II)

J. F. Henry, ChairJ. A. Siefert, SecretaryF. AbeS. H. BowesD. A. CanonicoK. K. ColemanP. D. FlennerJ. R. FouldsG. W. GalanesM. GoldF. MasuyamaT. Melfi

W. F. Newell, Jr.M. OrtolaniJ. ParkerW. J. SperkoR. W. SwindemanJ. M. TanzoshR. H. WorthingtonR. G. YoungF. ZellerG. Cumino, Contributing MemberB. W. Roberts, ContributingMember

Working Group on Data Analysis (BPV II)

J. F. Grubb, ChairF. AbeJ. R. FouldsM. GoldJ. F. HenryM. KatcherF. Masuyama

W. Ren

M. Subanovic

M. J. Swindeman

R. W. Swindeman

B. W. Roberts, ContributingMember

China International Working Group (BPV II)

B. Shou, ChairA. T. Xu, SecretaryW. FangQ. C. FengS. HuoF. KongH. LiJ. LiS. LiZ. RongcanS. TanC. WangJ. WangQ.-J. Wang

X. WangF. YangG. YangH.-C. YangR. YeL. YinD. ZhangH. ZhangX.-H. ZhangYingkai ZhangYong ZhangQ. ZhaoS. ZhaoJ. Zou

COMMITTEE ON CONSTRUCTION OF NUCLEAR FACILITYCOMPONENTS (BPV III)

R. S. Hill III, ChairR. B. Keating, Vice ChairJ. C. Minichiello, Vice ChairA. Byk, Staff SecretaryT. M. AdamsA. AppletonR. W. BarnesW. H. BorterC. W. BrunyT. D. BurchellR. P. DeublerA. C. EberhardtR. M. JesseeR. I. JetterC. C. KimG. H. KooV. KostarevK. A. ManolyD. E. MatthewsR. P. McIntyreM. N. Mitchell

M. MorishitaD. K. MortonT. NagataR. F. Reedy, Sr.I. SaitoS. ShamC. T. SmithW. K. Sowder, Jr.W. J. SperkoJ. P. TuckerK. R. WichmanC. S. WithersY. H. Choi, DelegateT. Ius, DelegateH.-T. Wang, DelegateM. Zhou, Contributing MemberE. B. Branch, Honorary MemberG. D. Cooper, Honorary MemberD. F. Landers, Honorary MemberR. A. Moen, Honorary MemberC. J. Pieper, Honorary Member

Executive Committee (BPV III)

R. S. Hill III, ChairA. Byk, Staff SecretaryT. M. AdamsC. W. BrunyP. R. DonavinR. M. JesseeR. B. KeatingR. P. McIntyre

J. C. Minichiello

M. Morishita

D. K. Morton

J. A. Munshi

C. A. Sanna

S. Sham

W. K. Sowder, Jr.

Subcommittee on Design (BPV III)

P. R. Donavin, ChairD. E. Matthews, Vice ChairG. L. Hollinger, SecretaryT. M. AdamsR. L. BrattonC. W. BrunyR. P. DeublerR. I. JetterC. JonkerR. B. KeatingK. A. ManolyR. J. Masterson

M. N. Mitchell

W. J. O’Donnell, Sr.E. L. Pleins

S. Sham

J. P. Tucker

W. F. Weitze

K. Wright

T. Yamazaki

J. Yang

R. S. Hill III, Contributing Member

M. H. Jawad, Contributing Member

Subgroup on Component Design (SC-D) (BPV III)

T. M. Adams, ChairR. B. Keating, Vice ChairS. Pellet, SecretaryG. A. AntakiS. AsadaJ. F. BallC. BasavarajuR. P. DeublerP. HirschbergO.-S. KimR. KleinH. KobayashiK. A. ManolyR. J. MastersonD. E. MatthewsJ. C. MinichielloD. K. Morton

T. M. MustoT. NagataA. N. NguyenE. L. PleinsI. SaitoG. C. SlagisJ. R. StinsonG. Z. TokarskiJ. P. TuckerP. VockC. WilsonJ. YangC. W. Bruny, Contributing MemberA. A. Dermenjian, ContributingMember

K. R. Wichman, Honorary Member

Working Group on Core Support Structures (SG-CD) (BPV III)

J. Yang, ChairJ. F. Kielb, SecretaryL. C. HartlessD. KeckT. LiszkaiH. S. Mehta

M. NakajimaM. D. SnyderA. TsirigotisR. VollmerR. Z. ZieglerJ. T. Land, Contributing Member

Working Group on Design of Division 3 Containment Systems(SG-CD) (BPV III)

D. K. Morton, ChairD. J. AmmermanG. BjorkmanV. BrozS. HorowitzD. W. LewisJ. C. Minichiello

E. L. Pleins

C. J. Temus

X. Zhai

I. D. McInnes, Contributing Member

H. P. Shrivastava, ContributingMember

xxi

Working Group on HDPE Design of Components (SG-CD) (BPV III)

T. M. Musto, ChairJ. Ossmann, SecretaryT. M. AdamsT. A. BaconM. BrandesD. BurwellS. ChoiJ. R. Hebeisen

P. KrishnaswamyK. A. ManolyM. MartinJ. C. MinichielloD. P. MunsonF. J. Schaaf, Jr.R. StakenborghsH. E. Svetlik

Working Group on Piping (SG-CD) (BPV III)

G. A. Antaki, ChairG. Z. Tokarski, SecretaryT. M. AdamsT. A. BaconC. BasavarajuJ. CatalanoF. ClaeysC. M. FaidyR. G. GiladaN. M. GrahamM. A. GrayR. J. GurdalR. W. HauptA. HiranoP. HirschbergM. KassarJ. Kawahata

R. B. KeatingV. KostarevD. LiebT. B. LittletonY. LiuJ. F. McCabeJ. C. MinichielloI.-K. NamM. S. SillsG. C. SlagisN. C. SutherlandC.-I. WuA. N. Nguyen, Contributing MemberN. J. Shah, Contributing MemberE. A. Wais, Contributing MemberE. C. Rodabaugh, HonoraryMember

Working Group on Pressure Relief (SG-CD) (BPV III)

J. F. Ball, ChairK. R. MayD. Miller

A. L. SzeglinD. G. ThibaultI. H. Tseng

Working Group on Pumps (SG-CD) (BPV III)

R. Klein, ChairD. Chowdhury, SecretaryP. W. BehnkeR. E. Cornman, Jr.X. DiM. D. EftychiouA. FraserC. GabhartR. Ghanbari

M. Higuchi

R. Ladefian

W. Lienau

K. J. Noel

R. A. Patrick

J. Sulley

R. Udo

A. G. Washburn

Working Group on Supports (SG-CD) (BPV III)

J. R. Stinson, ChairU. S. Bandyopadhyay, SecretaryK. AvrithiT. H. BakerF. J. BirchR. P. DeublerN. M. GrahamR. J. Masterson

S. Pellet

I. Saito

H. P. Srivastava

C. Stirzel

G. Z. Tokarski

P. Wiseman

C.-I. Wu

Working Group on Valves (SG-CD) (BPV III)

P. Vock, ChairS. Jones, SecretaryM. C. BuckleyR. FarrellG. A. JollyJ. KleinT. Lippucci

C. A. MizerJ. O’CallaghanH. O’BrienK. E. Reid IIJ. SulleyI. H. TsengJ. P. Tucker

Working Group on Vessels (SG-CD) (BPV III)

D. E. Matthews, ChairC. Wilson, SecretaryC. BasavarajuJ. V. Gregg, Jr.M. KassarR. B. KeatingD. KeckJ. KimO.-S. KimT. MitsuhashiM. Nair

T. J. Schriefer

M. C. Scott

P. K. Shah

J. Shupert

C. Turylo

D. Vlaicu

W. F. Weitze

T. Yamazaki

R. Z. Ziegler

A. Kalnins, Contributing Member

Subgroup on Design Methods (SC-D) (BPV III)

C. W. Bruny, ChairS. McKillop, SecretaryK. AvrithiW. CulpP. R. DonavinJ. V. Gregg, Jr.H. T. Harrison IIIK. HsuC. JonkerM. Kassar

D. Keck

M. N. Mitchell

W. J. O’Donnell, Sr.P. J. O’ReganW. D. Reinhardt

P. Smith

S. D. Snow

W. F. Weitze

K. Wright

Working Group on Design Methodology (SG-DM) (BPV III)

S. D. Snow, ChairC. F. Heberling II, SecretaryK. AvrithiC. BasavarajuD. L. CaldwellD. DeweesC. M. FaidyR. FarrellH. T. Harrison IIIP. HirschbergM. KassarR. B. KeatingJ. KimH. KobayashiT. Liszkai

J. F. McCabeS. McKillopS. RanganathW. D. ReinhardtD. H. RoartyP. K. ShahR. VollmerS. WangW. F. WeitzeJ. WenT. M. WigerK. WrightJ. YangR. D. Blevins, Contributing MemberM. R. Breach, Contributing Member

Working Group on Environmental Effects (SG-DM) (BPV III)

C. Jonker, ChairB. D. Frew, SecretaryW. CulpP. J. Dobson

J. KimJ. E. NestellM. OsterfossT. J. Schriefer

xxii

Working Group on Environmental Fatigue Evaluation Methods(SG-DM) (BPV III)

K. Wright, ChairM. A. Gray, Vice ChairW. F. Weitze, SecretaryT. M. AdamsS. AsadaK. AvrithiR. C. CipollaT. M. DamianiC. M. FaidyT. D. Gilman

S. R. GosselinY. HeP. HirschbergH. S. MehtaT. MetaisJ.-S. ParkD. H. RoartyI. SaitoD. VlaicuR. Z. Ziegler

Working Group on Fatigue Strength (SG-DM) (BPV III)

P. R. Donavin, ChairM. S. Shelton, SecretaryT. M. DamianiD. DeweesC. M. FaidyS. R. GosselinR. J. GurdalC. F. Heberling IIC. E. HinnantP. HirschbergK. Hsu

S. H. Kleinsmith

S. Majumdar

S. N. Malik

S. Mohanty

D. H. Roarty

A. Tsirigotis

K. Wright

H. H. Ziada

W. J. O'Donnell, Sr., ContributingMember

Working Group on Graphite and Composites Design(SG-DM) (BPV III)

M. N. Mitchell, ChairM. W. Davies, Vice ChairT. D. Burchell, SecretaryA. AppletonS. R. CadellS.-H. ChiW. J. Geringer

S. T. GonczyM. G. JenkinsY. KatohJ. OssmannM. RoemmlerS. YuG. L. Zeng

Working Group on Probabilistic Methods in Design(SG-DM) (BPV III)

M. Golliet, ChairT. AsayamaK. AvrithiD. O. HenryR. S. Hill III

M. MorishitaP. J. O'ReganN. A. PalmI. Saito

Special Working Group on Computational Modeling for ExplicitDynamics (SG-DM) (BPV III)

G. Bjorkman, ChairD. J. Ammerman, Vice ChairV. Broz, SecretaryM. R. BreachJ. M. JordanS. KuehnerD. Molitoris

W. D. Reinhardt

P. Y.-K. Shih

S. D. Snow

C.-F. Tso

M. C. Yaksh

U. Zencker

Subgroup on Elevated Temperature Design (SC-D) (BPV III)

S. Sham, ChairT. AsayamaC. Becht IVF. W. BrustP. CarterB. F. HantzA. B. HullM. H. JawadR. I. Jetter

G. H. KooS. MajumdarJ. E. NestellW. J. O'Donnell, Sr.R. W. SwindemanD. S. Griffin, Contributing MemberW. J. Koves, Contributing MemberD. L. Marriott, ContributingMember

Working Group on Allowable Stress Criteria (SG-ETD) (BPV III)

R. W. Swindeman, ChairR. Wright, SecretaryJ. R. FouldsC.