1、ASME B31.1a-2005Addenda to ASME B31.1-2004Power PipingASME Code for Pressure Piping, B31AN AMERICAN NATIONAL STANDARDThree Park Avenue New York, NY 10016A5804ACopyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license fr
2、om IHS-,-,-Date of Issuance: April 28, 2006Mandatory Date: October 28, 2006This Addenda was approved by the American National Standards Instituteand designated ASME B31.1a-2005 on July 8, 2005ASME is the registered trademark of The American Society of Mechanical Engineers.This code or standard was d
3、eveloped under procedures accredited as meeting the criteria for American NationalStandards. The Standards Committee that approved the code or standard was balanced to assure that individuals fromcompetent and concerned interests have had an opportunity to participate. The proposed code or standard
4、was madeavailable for public review and comment that provides an opportunity for additional public 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 p
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7、 or industry endorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with the establishedASME procedures and policies, which precludes the issuance of interpretations by individuals.No part of this document may be reproduc
8、ed in any form,in an electronic retrieval system or otherwise,without the prior written permission of the publisher.The American Society of Mechanical EngineersThree Park Avenue, New York, NY 10016-5990Copyright 2006 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.C
9、opyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-SUMMARY OF CHANGESAddenda to ASME B31.1-2004 are issued in the form of replacement pages. Revisions, additions,or deletions are incorporated directly
10、 into the affected pages. It is advisable, however, that allreplaced pages be retained for reference.Replace or insert the pages listed. Changes given below are identified on the pages by a marginnote, (A05), placed next to the affected area. Revisions to ASME B31.1-2004 are indicated by (04).For th
11、e listing below, the Page references the affected area. A margin note, (A05), placed next tothe heading indicates Location. Revisions are listed under Change.Page Location Changevii, viii Committee Roster Updated1, 2 100.1.2 Subparagraphs redesignated as (A)(1)(3)and (B)48 100.2 braze welding, brazi
12、ng, examination,inspection, and soldering revised1112.1 102.3.2(C) Revised102.3.2(D) Revised16 104.1.2(A.5) Revised17 Table 104.1.2(A) General Note (a) revised19, 19.1 104.3.1(E) Revised20 Fig. 104.3.1(D) Top equation revised26, 27 104.7.2(D) Revised104.8.1 (1) Equation (11B) revised(2) Nomenclature
13、 for Shadded104.8.2 (1) Equation (12B) revised(2) Nomenclature for MBrevised104.8.3 (1) Former eq. (13B) revised to beidentical with former eq. (13A);equations united as eq. (13)(2) Nomenclature for f(Sh SL) added3032.1 107.1(F) Added107.4 Revised114.2.1 Revised in its entirety41 119.10.1 (1) Nomenc
14、lature for Ecand Ehrevised(2) Nomenclature for Shadded42 121.2 (1) Subparagraph (H) revised(2) Subparagraph (I) redesignated as (J)(3) New subparagraph (I) added4550.1 121.8.2(B) Second paragraph deleted(c)Copyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduc
15、tion or networking permitted without license from IHS-,-,-Page Location Change122.1.4(A) Subparagraphs (A.1), (A.3), and (A.4)revised122.1.4(B) Subparagraphs (B.1), (B.3), and (B.4)revised122.1.5 (1) Subparagraphs (C) and (D)redesignated as (D) and (E)(2) New subparagraph (C) added(3) Subparagraphs
16、D) and (E) revised122.1.7 First paragraph revised122.1.7(A.1.B) Revised122.1.7(A.4) Revised122.1.7(C) Subparagraphs (C.4), (C.5), (C.6), and(C.12) revised5559 122.7.3(A) Revised in its entirety122.8.1(B.1) Revised in its entirety122.8.2(C) Revised in its entirety122.8.3(B) Revised60, 61 123.1.1(E)
17、Added124.2(A) Revised6469 Table 126.1 (1) ASTM A 336/A 336M, A 928, A 815,A 992, B 444, B 704, B 705, B 443, andB 446 added(2) MSS SP-68 added(3) American National Standards B1.20.3,B16.18, and B18.22M relocated to listof ASME Codes and high temperature water is generated at pressuresexceeding 160 p
18、sig 1103 kPa (gage) and/or tempera-tures exceeding 250F (120C).Boiler external piping shall be considered as that pip-ing which begins where the boiler proper terminates at(1) the first circumferential joint for welding endconnections; or(2) the face of the first flange in bolted flangedconnections;
19、 or(3) the first threaded joint in that type of connection;and which extends up to and including the valve orvalves required by para. 122.1.The terminal points themselves are considered partof the boiler external piping. The terminal points andpiping external to power boilers are illustrated by Figs
20、100.1.2(A), 100.1.2(B), and 100.1.2(C).Piping between the terminal points and the valve orvalves required by para. 122.1 shall be provided withData Reports, inspection, and stamping as required bySection I of the ASME Boiler and Pressure Vessel Code.All welding and brazing of this piping shall be p
21、er-formed by manufacturers or contractors authorized touse the appropriate symbol shown in Figs. PG-105.1through PG-105.3 of Section I of the ASME Boiler andPressure Vessel Code. The installation of boiler externalpiping by mechanical means may be performed by anorganization not holding a Code symbo
22、l stamp. How-ever, the holder of a valid S, A, or PP Certificate ofAuthorization shall be responsible for the documenta-tion and hydrostatic test, regardless of the method ofassembly. The quality control system requirements ofSection I of the ASME Boiler and Pressure Vessel Codeshall apply. These re
23、quirements are shown in Appendix Jof this Code.(A05)Copyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASME B31.1a-2005 100.1.2100.1.3CondenserFrom feedpumpsAlternativespara. 122.1.7(B.9)Administrati
24、ve Jurisdiction and Technical ResponsibilityPara. 122.1.7(B)Start-up systemmay vary to suitboiler manufacturerEconomizerConvectionand radiantsectionReheaterSuperheaterTurbine valve orCode stop valvepara. 122.1.7(A)TurbineTo equipmentBoiler Proper The ASME Boiler and Pressure Vessel Code (ASME BPVC)
25、has total administrative jurisdiction and technical responsibility. Refer to ASME BPVC Section I Preamble.Boiler External Piping and Joint (BEP) The ASME BPVC has total administrative jurisdiction (mandatory certification by Code Symbol stamping, ASME Data Forms, and Authorized Inspection) of BEP. T
26、he ASME Section Committee B31.1 has been assigned technical responsibility. Refer to ASME BPVC Section I Preamble, fifth, sixth, and seventh paragraphs and ASME B31.1 Scope, para. 100.1.2(A). Applicable ASME B31.1 Editions and Addenda are referenced in ASME BPVC Section I, PG-58.3.Nonboiler External
27、 Piping and Joint (NBEP) The ASME Code Committee for Pressure Piping, B31, has total administrative and technical responsibility.Fig. 100.1.2(A) Code Jurisdictional Limits for Piping Forced Flow Steam Generator With No Fixed Steam andWater LineThe valve or valves required by para. 122.1 are partof t
28、he boiler external piping, but do not require ASMEBoiler and Pressure Vessel Code, Section I inspectionand stamping except for safety, safety relief, and reliefvalves, see para. 107.8.2. Refer to PG-11.Pipe connections meeting all other requirements ofthis Code but not exceeding NPS12may be welded t
29、opipe or boiler headers without inspection and stamping2required by Section I of the ASME Boiler and PressureVessel Code.(B) Nonboiler external piping includes all the pipingcovered by this Code except for that portion definedabove as boiler external piping.100.1.3 This Code does not apply to the fo
30、llowing:(A) economizers, heaters, pressure vessels, andCopyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASME B31.1a-2005Blow-offsingle and multipleinstallationsFeedwater systems122.1.3DrainDrain Dr
31、ain122.1.5Soot blowersLevel indicators 122.1.6122.1.4Main steam122.1.2122.6.2Vents andinstrumentationDrainSingle installationMultiple installationCommon headerControl device122.1.6VentDrainInlet header(if used)SuperheaterReheaterEconomizerDrain122.1.7(D)Hot reheat122.1.7(D)Cold reheatVentVentDrain12
32、2.1.2Steam drumSoot blowersSurface blowContinuousblowChemical feeddrum sampleMultiple installationsSingle installationCommon headerSingle boilerSingle boilerTwo or moreboilers fed froma common sourceTwo or moreboilers fedfrom a commonsource (122.1.7)Regulating valvesBoiler No. 2Boiler No. 1Boiler No
33、 2Boiler No. 1122.1.7VentVent122.1.4Water drumAdministrative Jurisdiction and Technical ResponsibilityBoiler Proper The ASME Boiler and Pressure Vessel Code (ASME BPVC) has total administrative jurisdiction and technical responsibility. Refer to ASME BPVC Section I Preamble.Boiler External Piping a
34、nd Joint (BEP) The ASME BPVC has total administrative jurisdiction (mandatory certification by Code Symbol stamping, ASME Data Forms, and Authorized Inspection) of BEP. The ASME Section Committee B31.1 has been assigned technical responsibility. Refer to ASME BPVC Section I Preamble and ASME B31.1 S
35、cope, para. 100.1.2(A). Applicable ASME B31.1 Editions and Addenda are referenced in ASME BPVC Section I, PG-58.3.Nonboiler External Piping and Joint (NBEP) The ASME Code Committee for Pressure Piping, B31, has total administrative and technical responsibility.Fig. 100.1.2(B) Code Jurisdictional Lim
36、its for Piping Drum-Type Boilers3Copyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-(A05)ASME B31.1a-2005 100.1.3100.2Regulating valvepara. 122.4(A.1)Regulating valvepara. 122.4(A.1)Stop valvepara. 1
37、22.4(A.1)Stop valvepara. 122.4(A.1)Administrative Jurisdiction and Technical ResponsibilityDesuperheaterlocated in boilerproperBlock valvepara. 122.4(A.1)Block valvepara. 122.4(A.1)Boiler Proper The ASME Boiler and Pressure Vessel Code (ASME BPVC) has total administrative jurisdiction and technical
38、responsibility. Refer to ASME BPVC Section 1 Preamble.Boiler External Piping and Joint (BEP) The ASME BPVC has total administrative jurisdiction (mandatory certification by Code Symbol stamping, ASME Data Forms, and Authorized Inspection) of BEP. The ASME Section Committee B31.1 has been assigned te
39、chnical responsibility. Refer to ASME BPVC Section I Preamble and ASME B31.1 Scope, para. 100.1.2(A). Applicable ASME B31.1 Editions and Addenda are referenced in ASME BPVC Section I, PG-58.3.Nonboiler External Piping and Joint (NBEP) The ASME Code Committee for Pressure Piping, B31, has total admin
40、istrative and technical responsibility.Desuperheaterlocated in boilerproperFig. 100.1.2(C) Code Jurisdictional Limits for Piping Spray-Type Desuperheatercomponents covered by Sections of the ASME Boilerand Pressure Vessel Code(B) building heating and distribution steam and con-densate piping designe
41、d for 15 psig 100 kPa (gage) orless, or hot water heating systems designed for 30 psig200 kPa (gage) or less(C) piping for hydraulic or pneumatic tools and theircomponents downstream of the first block or stop valveoff the system distribution header(D) piping for marine or other installations underF
42、ederal control(E) towers, building frames, tanks, mechanical equip-ment, instruments, and foundations100.2 DefinitionsSome commonly used terms relating to piping aredefined below. Terms related to welding generally agree4with AWS A3.0. Some welding terms are defined withspecified reference to piping
43、 For welding terms usedin this Code, but not shown here, definitions of AWSA3.0 apply.anchor: a rigid restraint providing substantially full fixa-tion, permitting neither translatory nor rotational dis-placement of the pipe.annealing: see heat treatments.arc welding: a group of welding processes wh
44、erein coales-cence is produced by heating with an electric arc or arcs,with or without the application of pressure and with orwithout the use of filler metal.assembly: the joining together of two or more pipingcomponents by bolting, welding, caulking, brazing, sol-dering, cementing, or threading int
45、o their installed loca-tion as specified by the engineering design.Copyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-100.2 ASME B31.1a-2005automatic welding: welding with equipment which per-forms t
46、he entire welding operation without constantobservation and adjustment of the controls by an opera-tor. The equipment may or may not perform the loadingand unloading of the work.backing ring: backing in the form of a ring that can beused in the welding of piping.ball joint: a component which permits
47、 universal rota-tional movement in a piping system.base metal: the metal to be welded, brazed, soldered,or cut.branch connection: the attachment of a branch pipe to therun of a main pipe with or without the use of fittings.braze welding: a method of welding whereby a groove,fillet, plug, or slot wel
48、d is made using a nonferrous fillermetal having a melting point below that of the basemetals, but above 840F (450C). The filler metal is notdistributed in the joint by capillary action. (Bronze weld-ing, formerly used, is a misnomer for this term.)brazing: a metal joining process wherein coalescence
49、 isproduced by use of a nonferrous filler metal having amelting point above 840F (450C) but lower than thatof the base metals joined. The filler metal is distributedbetween the closely fitted surfaces of the joint by capil-lary action.butt joint: a joint between two members lying approxi-mately in the same ponent: component as used in
