APPENDIX

Braced and Stayed Surfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177Method of Checking Safety-Valve Capacity by Measuring Maximum Amount

of Fuel That Can Be Burned. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177Automatic Water Gages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182Fusible Plugs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182Proof Tests to Establish Maximum Allowable Working Pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183Suggested Rules Covering Existing Installations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187Safety Valves for Power Boilers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187Examples of Methods of Computation of Openings in Vessel Shells. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188Examples of Computation of Allowable Loading on Structural Attachments to Tubes. . . . . . . . . . . . . . . . . . . . . 200Preheating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203Maximum Allowable Working Pressures — Thick Shells. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203Rounded Indication Charts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204Quality Control System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206Acceptance of Testing Laboratories and Authorized Observers for Capacity Certification of Safety and

Safety Relief Valves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212

FiguresFig. A-8 Detail Sketches Showing Application of PG-48 and PFT-27 to the Staying

of Boilers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178Fig. A-9 Typical Facings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181Fig. A-10 Typical Forms of Fusible Plugs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181Fig. A-66 Example for Typical Nozzle Computations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189Fig. A-67 Example for Typical Nozzle Computations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192Fig. A-68 Example for Typical Nozzle Computations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193Fig. A-69 Example for Typical Nozzle Computations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194Figs. A-71–A-74 Types of Structural Attachments to Tubes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200Fig. 1 Aligned Rounded Indications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205Fig. 2 Groups of Aligned Rounded Indications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205Fig. 3.1 Charts fort 1⁄8 in. to 1⁄4 in., Inclusive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206Fig. 3.2 Charts fort Over 1⁄4 in. to 3⁄8 in., Inclusive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207Fig. 3.3 Charts fort Over 3⁄8 in. to 3⁄4 in., Inclusive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208Fig. 3.4 Charts fort Over 3⁄4 in. to 2 in., Inclusive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209Fig. 3.5 Charts fort Over 2 in. to 4 in., Inclusive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210Fig. 3.6 Charts fort Over 4 in. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211Fig. A-370 Sample Certificate of Authorization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267

TablesA-44 Guide for Estimating Steaming Capacity Based on Heating Surface. . . . . . . . . . . . . . 1871 Maximum Permissible Size of Rounded Indication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204A-360 Codes, Standards, and Specifications Referenced in Text. . . . . . . . . . . . . . . . . . . . . . . . 264

175

A-361 Maximum Allowable Working Pressure (MAWP) for the Use of ASME B16.5Pipe Flanges and Flanged Fittings and ASME B16.34 Valves — Flanged,Threaded, and Welding End (Standard Class). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265

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APPENDIX Fig. A-8

FIG. A-8 DETAIL SKETCHES SHOWING APPLICATION OF PG-48AND PFT-27 TO THE STAYING OF BOILERS (CONT’D)

179

Fig. A-8 1998 SECTION I

FIG. A-8 DETAIL SKETCHES SHOWING APPLICATION OF PG-48AND PFT-27 TO THE STAYING OF BOILERS (CONT’D)

180

Fig. 1 APPENDIX Fig. 2

FIG

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ION

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A-250.3.6 1998 SECTION I A-301.1

FIG. 3.1 CHARTS FOR t 1⁄8 in. TO 1⁄4 in., INCLUSIVE

A-250.3.6 Rounded Indication Charts. Therounded indications characterized as imperfections shallnot exceed that shown in the charts.

The charts in Fig. 3.1 through Fig. 3.6 illustratevarious types of assorted, randomly dispersed, andclustered rounded indications for different weld thick-nesses greater than1⁄8 in. (3.2 mm). These chartsrepresent the maximum acceptable concentration limitsfor rounded indications.

The chart for each thickness range represents full-scale 6 in. (152 mm) radiographs, and shall not beenlarged or reduced. The distributions shown are notnecessarily the patterns that may appear on the radio-graph, but are typical of the concentration and size ofindications permitted.

A-250.3.7 Weld Thicknesst Less Than 1⁄8 in.(3.2 mm). For t less than1⁄8 in. (3.2 mm) the maximumnumber of rounded indications shall not exceed 12 ina 6 in. (152 mm) length of weld. A proportionallyfewer number of indications shall be permitted in weldsless than 6 in. in length.

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A-250.3.8 Clustered Indications.The illustrationsfor clustered indications show up to four times asmany indications in a local area, as that shown in theillustrations for random indications. The length of anacceptable cluster shall not exceed the lesser of 1 in.or 2t. Where more than one cluster is present, the sumof the lengths of the clusters shall not exceed 1 in.(25 mm) in a 6 in. (152 mm) length of weld.

QUALITY CONTROL SYSTEM

A-300

A-301 General

A-301.1 Quality Control System.The Manufactureror assembler shall have and maintain a quality controlsystem which will establish that all Code requirements,including material, design, fabrication, examination (bythe Manufacturer) and inspection of boilers and boilerparts (by the Authorized Inspector), will be met. Pro-vided that Code requirements are suitably identified,

A-302.6 APPENDIX A-302.12

FIG. 3.4 CHARTS FOR t OVER 3⁄4 in. TO 2 in., INCLUSIVE

for correction of nonconformities. A nonconformity isany condition which does not comply with the applicablerules of this Section. Nonconformities must be correctedor eliminated in some way before the completed compo-nent can be considered to comply with this Section.

A-302.7 Welding. The quality control system shallinclude provisions for indicating that welding conformsto requirements of Section IX as supplemented by thisSection.

A-302.8 Nondestructive Examination.The qualitycontrol system shall include provisions for identifyingnondestructive examination procedures the Manufacturerwill apply to conform with requirements of this Section.

A-302.9 Heat Treatment.The quality control systemshall provide controls to assure that heat treatments asrequired by the rules of this Section are applied. Means

209

shall be indicated by which the Authorized Inspectorcan satisfy himself that these Code heat treatmentrequirements are met. This may be by review of furnacetime–temperature records or by other methods as appro-priate.

A-302.10 Calibration of Measurement and TestEquipment. The Manufacturer or assembler shall havea system for the calibration of examination, measuring,and test equipment used in fulfillment of requirementsof this Section.

A-302.11 Records Retention.The Manufacturer orassembler shall have a system for the maintenance ofradiographs and Manufacturers’ Data Reports as re-quired by this Section.

A-302.12 Sample Forms.The forms used in thequality control system and any detailed procedures for

A-302.12 1998 SECTION I A-302.13.2.2

FIG. 3.5 CHARTS FOR t OVER 2 in. TO 4 in., INCLUSIVE

their use shall be available for review. The writtendescription shall make necessary references to theseforms.

A-302.13 Inspection of Boilers and Boiler PartsA-302.13.1 Inspection of boilers and boiler parts

shall be by the Authorized Inspector described in PG-91.

A-302.13.2The written description of the qualitycontrol system shall include reference to the AuthorizedInspector.

A-302.13.2.1The Manufacturer (or assembler)shall make available to the Authorized Inspector at theManufacturer’s plant (or construction site) a current

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copy of the written description or the applicable qualitycontrol system.

A-302.13.2.2The Manufacturer’s quality controlsystem shall provide for the Authorized Inspector atthe Manufacturer’s plant to have access to all drawings,calculations, specifications, procedures, process sheets,repair procedures, records, test results, and any otherdocuments as necessary for the Inspector to perform hisduties in accordance with this Section. The Manufacturermay provide such access either to his own files ofsuch documents or by providing copies to the Inspector.

ASME B&PVC sec1$$$u70 04-21-99 10:40:47 pd: sec1 Rev 14.04

CODES, STANDARDS, ANDSPECIFICATIONS

REFERENCED IN TEXT

A-360 REFERENCED STANDARDS

Specific editions of standards referenced in this Sec-tion are shown in Table A-360. It is not practical torefer to a specific edition of each standard throughoutthe text, so edition references are centralized here.Table A-360 will be revised at intervals and reissuedas needed.

263

ASME B&PVC sec1$$$u70 04-21-99 10:40:47 pd: sec1 Rev 14.04

Table A-360 1998 SECTION I

98

A99

TABLE A-360CODES, STANDARDS, AND SPECIFICATIONS REFERENCED IN TEXT

ASME StandardsB1.20.1-1983(R1992) Pipe Threads, General Purpose (Inch)B16.1-1989 Cast Iron Pipe Flanges and Flanged FittingsB16.3-1992 Malleable Iron Threaded Fittings, Classes 150 and 300B16.4-1992 Gray Iron Threaded Fittings, Class 125 and 250B16.5-1996 Pipe Flanges and Flanged Fittings [Note (8)]B16.9-1993 Factory-Made Wrought Steel Buttwelding FittingsB16.11-1996 Forged Fittings, Socket-Welding and ThreadedB16.15-1985(R1994) Cast Bronze Threaded Fittings, Class 125 and 250B16.20-1993 Ring-Joint Gaskets and Grooves for Steel Pipe FlangesB16.24-1991(R1995) Cast Copper Alloy Pipe Flanges and Flanged FittingsB16.25-1997 Buttwelding EndsB16.28-1994 Wrought Steel Buttwelding Short Radius Elbows and ReturnsB16.34-1996 Valves — Flanged, Threaded, and Welding End [Note (8)]B16.42-1987(R1997) Ductile Iron Pipe Flanges and Flanged Fittings, Classes 150 and 300B31.1-1998 Power Piping [Notes (2), (3), (4), (5), (6), and (9)]B36.10M-1996 Welded and Seamless Wrought Steel Pipe

ASTM SpecificationsA 126-1995 Standard Specification for Gray Iron Castings for Valves, Flanges, and Pipe

FittingsB 139-1995 Standard Specification for Phosphor-Bronze Rod, Bar, and Shapes

ASTM Standard Test MethodsE 8-1998 Standard Test Methods of Tension Testing of Metallic MaterialsE 125-63(R1997) Reference Photographs for Magnetic Particle Indications on Ferrous Castings

ASME Performance Test CodePTC 25-1994 Pressure Relief Devices

ASNT SpecificationSNT-TC-1A(R1996) Recommended Practice for Nondestructive Testing Personnel Qualification and

Certification

GENERAL NOTE: The issue date shown immediately following the hyphen after the number of the standard (e.g., B1.20.1-1983) isthe effective date of issue (edition) of the standard.

NOTES:(1) Deleted.

(2) Note 1 of Table A-1 of B31.1, Appendix A, applies to Electric Resistance Welded A-333, Grade 6 material.

(3) The weld end transition of Fig. PG-42.1 is also acceptable.

(4) Deleted.

(5) The use of diverter valves under Section I reheater safety valves is prohibited.

(6) The minimum carbon content specified in paras. 124.2(d) and 127.2.1 and in Note (18) of Table A-2 of B31.1 shall only apply tolow alloy steels whose nominal composition is 21 /4 Cr-1 Mo.

(7) Deleted.

(8) Saturated steam ratings and boiler feed and blowoff ratings for B16.5 flanges and B16.34 Standard Class valves of Material Group1.1 are given in Table A-361. For other conditions, other materials, Special Class or Limited Class valves, or intermediate ratingvalves, see ASME B16.5 and ASME B16.34 for pressure–temperature limitations.

(9) Paragraph 136.4.5 (A-5) is not applicable to Boiler Extended Piping.

264