1、AN AMERICAN NATIONAL STANDARDASME B31.8a-2000ADDENDAtoASME B31.8-1999GAS TRANSMISSIONANDDISTRIBUTIONPIPING SYSTEMSTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSThree Park Avenue O New York,NY 10016Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by
2、 Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.Date of Issuance:November 16,2001ASME is the registered trademark of The American Society of Mechanical Engineers.This code or standard was developed under procedures accredited as meeting the cr
3、iteria for AmericanNational Standards.The Standards Committee that approved the code or standard was balanced to assure thatindividuals from competent and concerned interests have had an opportunity to participate.The proposed codeor standard was made available for public review and comment that pro
4、vides an opportunity for additionalpublic input from industry,academia,regulatory agencies,and the 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
5、in connection withany items mentioned in this document,and does not undertake to insure anyone utilizing a standard againstliability for infringement of any applicable letters patent,nor assume any such liability.Users of a code orstandard are expressly advised that determination of the validity of
6、any such patent rights,and the risk ofinfringement of such rights,is entirely their own responsibility.Participation by federal agency representative(s)or person(s)affiliated with industry is not to be interpretedas government or industry endorsement of this code or standard.ASME accepts responsibil
7、ity for only those interpretations of this document issued in accordance with theestablished ASME procedures and policies,which precludes the issuance of interpretations by individuals.No part of this document may be reproduced in any form,in an electronic retrieval system or otherwise,without the p
8、rior written permission of the publisher.The American Society of Mechanical EngineersThree Park Avenue,New York,NY 10016-5990Copyright 2001 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll Rights ReservedPrinted in U.S.A.Copyrighted material licensed to Stanford University by Thomson Scientific(),d
9、ownloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.ASME B31.8a-2000Following approval by the ASME B31 Committee and ASME,and after public review,ASME B31.8a-2000 was approved by the American National Standards Institute
10、 on December 13,2000.This is the first Addenda to be published to ASME B31.8-1999.It was issued on November 16,2001,andis effective upon date of issuance.Addenda to the 1999 Edition of ASME B31.8 are issued in the form of replacement pages.Revisions,additions,and deletions are incorporated directly
11、into the affected pages.It is advisable,however,that thispage,the Addenda title and copyright pages,and all replaced pages be retained for reference.SUMMARY OF CHANGESReplace or insert the pages listed.Changes given below are identified on the pages by a margin note,A00,placed next to the affected a
12、rea.Changes made in ASME B31.8-1999 are indicated by(99).The pages notlisted are the reverse sides of the listed pages and contain no changes.PageLocationChangeiiivContentsUpdated to reflect Addenda7805.217Revised8807Added10811.25Revised11817.11Revised23831.373First and second paragraphs revised3184
13、1.11(c)(1)Revised36841.231(g)Revised70,70.1850.43(a)Revised and redesignated from 850.43850.43(b)Added850.43(c)Added850.44Revised74,74.1851.9Added851.10Added851.11Redesignated from 851.976,76.1852.52Second paragraph added95,95.1A802.3Added96,96.1A803Definition of return interval revised(c)Copyrighte
14、d material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.PageLocationChangeA811RevisedA814.1Last paragraph added97,97.1A817AddedA817.1AddedA817.2AddedA817.3A
15、dded101,101.1Table A842.22Note(1)added115B850.1(c)(2)(b)Equation corrected by errata to read 0.4546183,184IndexUpdated to reflect AddendaSPECIAL NOTEThe interpretations to ASME B31.8 are included as a separate section for the users convenience.(d)Copyrighted material licensed to Stanford University
16、by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.CONTENTSForeword.viiPersonnel.ixIntroduction.xiiiSummary of Changes.xvGeneral Provisions and Definitions801General.1802Scope and Intent.1803Piping Systems Definitions.2804Piping Systems Component Definitions.4805Design,Fabrication,Operation,and Testing Terms.6807Quality Assurance.8Chapter IMaterials and Equipment810Materials and Equipment.98
