1.1 How to read ASME Code.pdf

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a s o e

A Code is a standard that has been adopted by one or

more governmental bodies and has the force of lawe.g. o e.One can refer ASME Code as ASME Standard when it

.Code will not retroactive, except errata.

30 2010 How to read ASME Code Prepared by SCBSlide No . 2



What is Standard?

Standard is a set of technical definitions and guidelines,

“ how to” instructions for designers, manufacturers andusers.Standards promote safety, reliability, productivity andefficiency in almost every industry that relies on engineering

.Standards can run from a few paragraphs to hundreds ofpages, and are written by experts with knowledge and

Standards do not enforce of law but become mandatory

when they have been incorporated into a business contractor ncorporate nto regu at ons.Their use is voluntary because they serve as guidelines.




Hierarch of Standards in USA andCanada

ASME Boiler and Pressure vessel Code – * , , , – Referenced** Codes : B 31.1, Section II, V and IX – - , – Standards, Recommendations : ANSI, ASTM,

ASNT AWSNational Board Inspection Code




SECTIONSI Rules for Construction of Power BoilersII Materials

– Part A - Ferrous Material Specifications – Part B - Nonferrous Material S ecifications

SECTIONSIV Rules for Construction of Heating BoilersV Nondestruct ive ExaminationVI Recommended Rules for the Care and Operation of

Heating Boilers – Part C - Specifications for Welding Rods,

Electrodes, and Filler Metals – Part D - Properties (Customary) – Part D - Properties (Metric)

III Subsection NCA - General Requirements for Division 1and Division 2

VII Recommended Guidelines for the Care of PowerBoilers

VIII Rules for Construct ion of Pressure Vessels – Division 1 – Division 2 - Alternative Rules – Division 3 - Alternative Rules for Construction of

III Divisi on 1 – Subsection NB - Class 1 Components – Subsection NC - Class 2 Components – Subsection ND - Class 3 Components – Subsection NE - Class MC Components

High Pressure Vessels

IX Welding and Brazing QualificationsX Fiber-Reinforced Plastic Pressure VesselsXI Rules for Inservice Inspection of Nuclear Power Plant

ComponentsXII Rules for Construction and Continued Service of – -

– Subsection NG - Core Support Structures – Subsection NH - Class 1 Components in Elevated

Temperature Service – Appendices

III Division 2 - Code for Concrete Containments

Transport Tanks

v s on - on ta nments or ransport an torage oSpent Nuclear Fuel and High Level Radioact ive Materialand Waste






Edition/Addeda Issue date Mandatory date.

ADD. 08 1 July 2008 1 Jan 2009.

Ed. 2010 2007+2 1 Jul 2010 1 Jan 2011






,

Only ASME BPVC can issue interpretations.

They are official opinion of ASME BPVC, starting in 1977.Written replies, explain or clarify rules to inquiriesconcerning interpretation of technical aspects of the Code.

.Interpretation do not establish new Code rules.Used to ublished semiannuall Jul and December until2004 and issue annually in July beginning with 2004 Edition.Not a part of the Code, to receive the paperback volume of

,for fee.




,

Formulated by ASME Code committees for “ special situation” so called a Case.Clarify existing Code requirements.Provide rule for new materials and new form of cons tructions when not covered by

, .Code case have a limited life, usually 3 years, unless the Committee reaffi rms them foranother 3 years or may also be annul led at any time by the committee.Using Code cases is not mandatory. They are permissive only (“ It is the opinion of thecommittee that……). They are an extension of the Code.When a Code Case is used, the Code Case number must be list ed on the Data Report.Effective immediately upon ASME approval. (to provide for the early implementation ofnew or revised Code rule since it need only two or three months to approve it!!! ).Can be become a part of the Code after gain experience over a period of time with new

, .The ASME publ ished Code Cases in two Code cases books: Boilers and PressureVessel, and Nuclear Components .






Based on historical data and experience which hasbeen a lied to the Code rules over the eriodfrom 1911 to the present.Therefore, the Code are not design Codes but

rather, a set of checks and balances to be appliedto the design once formulated.Is written as if one were viewing a finishedconstruction.

os equa ons may e use as o- o o- agesas applied to the finished product.






Forward – .

dimensions, sizes, or other parameters are notspecified with tolerances, the values of these

parameters are considered nominal and allowabletolerances or local variances may be considered

and standard practices as determined by the.




Shall, Will : mandatory

May not : prohibited

May, Can : recommen at ons,

mandatory but looking for

Slide No . 15



Parenthesis expression : units conversion

Punctuation

, pause: can be followed by ; ands or ors and

finished by . First sentence will set

the plan. stop




UW-51 Main paragraph-

(1) Second level sub-paragraph

Or QW-201 Main paragraph

QW-201.1 First level sub-paragraph(1) Second level sub-paragraph




Use the table of contents for the searchingsub ect. Table contents are revised annuall .Use the index sometime very helpful for a smartkey-word. They are seldom revised (6 to 10 years).




. .

MANDATORY APPENDIX 33STANDARD UNITS FOR USE IN EQUATIONS

TABLE 33-1STANDARD UNITS FOR USE IN EQUATIONSQuantity U.S. Customary Units SI UnltsLinear dimensions (e.g., length, height, thickness, radius, diameter) inches (in.) millimeters (mm)

Area square inches (in. 2) square millimeters (mm 2)Volume cubic inches (in. 3) cubic millimeters (mm 3)Section modulus cubic inches (in. 3) cubic miiiimeterr (mm 3)

oment o nert a o sect on nc es n m meters mmMass (weight) pounds mass (Ibm) kilograms (kg)Force (load) pounds farce (ibf) newtons (N)Bending moment inch-pounds (in.-lb) newton-millimeters (N.mm)

Pressure, stress, stress intensity, and modulus of elasticity pounds per square inch (psi) megapascals (MPa)Energy kg., Charpy impact values) foot-pounds (ft-b) joules (J)Temperature degrees Fahrenheit (oF) degrees Celsius (oC)

Absolute temperatwe Rankine (R) kelvin (K)Fracture toughness ksi square root inches (ksi √in.) MPa square root meters

Angle degrees or radians degrees or radiansBoiler ca acitv Btu/hr watts W




-

Allow mixing of different measuring units.Only one system is expected in all aspect of design. However, the local customary units may

be used to design and document of that component. Similarly, for proprietary components. .When separate equations are provided for both units (SI unit or US customary unit), otherlocal customary units may be converted and used in that equation. The result obtained fromexecution of these equations may be converted to other units.Production, measurement and test equipment, drawings, welding procedure specifications,we ng proce ure an per ormance qua ca ons, an o er a r ca on ocumen s may e n

U.S. Customary, SI, or local customary units in accordance with the fabricator's practice.When values shown in calculations and analysis, fabrication documents, or measurement andtest equipment are in different units, any conversions necessary for verification of Codecompliance and to ensure that dimensional consistency is maintained, shall be in accordancew e o ow ng:

(a) Conversion factors (found in non-mandatory Appendix GG) shall be accurate to at leastfour significant figures.

(b) The results of conversions of units shall be expressed to a minimum of three significant. All entries on a Manufacturer's Data Report and data for Code required nameplate markingshall be in units consistent with the fabrication drawings for the component using U.S.Customary, SI, or local customary units. It is acceptable to show alternate unitsparenthetically.




,

Question (1): Is it acceptable to maintain welder performancequalification records in SI units, with a conversion table as partof the welding manual to ensure that qualification limits are notexceeded?Reply (1): Yes. Code Case 2523 provides information aboutwhen such conversions are required and the requirements for

.

Question (2): Is it acceptable to maintain welding procedure

and U.S. Customary units in parentheses, with a conversiontable as part of the welding manual to ensure that qualification

limits are not exceeded?ep y : es. o e ase prov es n orma on a ouwhen such conversions are required and the requirements forperforming such conversions.

Slide No . 21



Any Question?

Slide No . 22

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1.1 How to read ASME Code.pdf