1、This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(
2、TBT)Committee.Designation:A815/A815M-18NTERNATIONALStandard Specification forWrought Ferritic,Ferritic/Austenitic,and MartensiticStainless Steel Piping Fittings1This standard is issued under the fixed designation A815/A815M:the number immediately following the designation indicates the yearof origin
3、al adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapprovalA superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.5 The values stated in either SI units or inch-pound units1.1 This specif
4、ication covers two general classes,WP andare to be regarded separately as standard.Within the text,theCR.of wrought ferritic,ferritic/austenitic,and martensiticSI units are shown in brackets.The values stated in eachstainless steel fittings of seamless and welded constructionsystem may not be exact
5、equivalents;therefore,each systemcovered by the latest revision of Specification A960/A960M.shall be used independently of the other.Combining valuesFittings differing from these standards may be furnished infrom the two systems may result in non-conformance with theaccordance with Supplementary Req
6、uirement S58 of Specifi-standard.cation A960/A960M.1.6 This international standard was developed in accor-1.1.1 Class WP fittings are subdivided into four subclasses:dance with internationally recognized principles on standard-Classes WP-S,WP-W,WP-WX,and WP-WU.They areization established in the Deci
7、sion on Principles for themanufactured to the requirements of Specification A960/Development of International Standards,Guides and Recom-A960M,and they shall have pressure ratings compatible withmendations issued by the World Trade Organization Technical13.2.Class WP-S fittings are those manufacture
8、d from seam-Barriers to Trade(TBT)Committee.less product by a seamless method of manufacture(markedwith class symbol WP-S);Class WP-W fittings are those which2.Referenced Documentscontain welds where the fitting fabrication or constructionwelds have been radiographed(marked with class symbol2.1 ASTM
9、 Standards:2WP-W);and Class WP-WX fittings are those which containA262 Practices for Detecting Susceptibility to Intergranularwelds where all welds have been radiographed(marked withAttack in Austenitic Stainless Steelsclass symbol WP-WX);and Class WP-WU fittings are thoseA388/A388M Practice for Ult
10、rasonic Examination of Steelwhich contain welds where all welds have been ultrasonicallyForgingstested(marked with class symbol WP-WU).A751 Test Methods,Practices,and Terminology for Chemi-1.1.2 Class CR fittings are those manufactured to thecal Analysis of Steel Productsrequirements of MSS SP-43,an
11、d they shall have pressureA763 Practices for Detecting Susceptibility to Intergranularratings compatible with 13.3.Attack in Ferritic Stainless SteelsA923 Test Methods for Detecting Detrimental Intermetallic1.2 This specification does not apply to cast fittingsPhase in Duplex Austenitic/Ferritic Sta
12、inless Steels1.3 Optional supplementary requirements are provided.A960/A960M Specification for Common Requirements forWhen desired,one or more of these may be specified in theWrought Steel Piping Fittingsorder.E165/E165M Practice for Liquid Penetrant Examination for1.4 This specification is expresse
13、d in both inch-pound unitsGeneral Industryand in SI units.However,unless the order specifies the2.2 ASME Standards:3applicable Mspecification designation SI units,the mate-B16.9 Factory-Made Wrought Butt-Welding Fittingsrial shall be furnished to inch-pound units.B16.11 Forged Fittings,Socket-Weldin
14、g and ThreadedThis specification is under the jurisdiction of ASTM Committee A01 on Steel,2 For referenced ASTM standards,visit the ASTM website,www.astm.org,orStainless Steel and Related Alloys and is the direct responsibility of Subcommitteecontact ASTM Customer Service at serviceastm.org.For Annu
15、al Book of ASTMA01.22 on Steel Forgings and Wrought Fittings for Piping Applications and BoltingStandards volume information,refer to the standards Document Summary page onMaterials for Piping and Special Purpose Applications.the ASTM website.Current edition approved June 1.2018.Published June 2018.
16、OriginallyAvailable from American Society of Mechanical Engineers(ASME),ASMEapproved in 1983.Last previous edition approved in 2017 as A815/A815M-17.International Headquarters,Two Park Ave.,New York,NY 10016-5990.http:/DOL:10.1520WA0815_A0815M-18.www.asme.org.*A Summary of Changes section appears at
17、 the end of this standardCopyright ASTM Intemational,100 Barr Harbor Drive,PO Box C700.West Conshohocken.PA 19428-2959.United States4A815/A815M-18TABLE 1 Chemical RequirementsNorE I-Where an ellipsis(.)appears in this table,there is no requirement.Composition,%GradeAPhos-GradeGradeUNS Carbon,Manga-S
18、ulfur,Silicon,Chrom-Molyb-Ni-WPCRmaxneseephorus,OthermaxmaxmaxNickelium denumCopperetrogenTitaniumFerritic SteelsWP27CR27S446270.0100.750.0200.0200.400.5025.0-0.75-0.200.015Nbo27.51.500.05-0.20WP33CR33S446260.060.750.0400.0200.750.5025.0-0.75-0.200.0400.20-1.0027.01.50(7x(C+N)minWP429CR429S429000.12
19、1.00.0400.0300.750.5014.0-16.0WP430CR430S430000.121.000.0400.0301.000.5016.0-18.0WP430TICR430TiS430360.101.000.0400.0301.000.7516.0(5xC)min 0.7519.5maxWP446CR446S446000.201.500.0400.0300.750.5023.00.25+27.0Ferritic/Austenitic SteelsWPS31803CRS31803S318030.0302.000.0300.0201.04.5-21.0-2.5-0.08-6.523.
20、03.50.20WPS32101CRS32101S321010.0404.00.0400.0301.001.35-21.0-0.10-0.10-0.20-6.01.7022.00.800.800.25WPS32202CRS32202S322020.0302.000.0400.0101.001.00-21.5-0.450.18-2.8024.00.26WPS32750CRS32750S327500.0301.200.0350.0200.86.0-24.0-3.0-0.50.24-8.026.05.00.32WPS32950CRS32950S329500.0302.000.0350.0100.60
21、3.526.0-1.00-0.15-5.229.02.500.35WPS32760CRS32760S327600.0301.000.0300.0101.006.0-24.0-3.0-0.500.20-8.026.094.0G1.000.3090.50-1.00WPS39274 CRS39274tS392740.0301.000.0300.0200.806.024.02.50-0.20-0.24-W8.026.03.50c0.800.321.50-2.50WPS32550CRS32550S325500.041.500.0400.0301.004.5-24.02.1.50-0.106.527.03
22、.92500.25WPS32205CRS32205S322050.0302.000.0300.0201.004.5-22.0-3.0-0.14-6.523.03.50.20Martensitic SteelsWP410CR410S410000.151.000.0400.0301.000.5011.5-max13.5WPS41008CRS41008S410080.081.000.0400.0301.000.6011.5-.13.5WPS41500CRS41500S415000.050.50-0.0300.0300.603.5-11.5-0.50-w1.005.514.01.000.50-1.00
23、Naming system developed and applied by ASTM IntemationalMaximum unless otherwise indicated.c%Cr+3.3%Mo+16%N=40minPNiobium and columbium are interchangeable names for the same element and both names are acceptable for use in A01.22 specifications.Radiographic examination of the weld buildup shall not
24、 be5.13.4 Repair of areas in the weld is permitted,but 5.13.1,required provided that all of the following steps are adhered to:5.13.2,and 5.13.3 must be repeated.5.13.1 The weld procedure and welders or welding opera-tors meet the requirements of 5.10,5.14 Stub ends may be produced with the entire l
25、ap added as5.13.2 Heat-treatment is performed after welding and priorweld metal to a straight pipe section provided the weldingto machining.satisfies the requirements of 5.10 for qualifications and Section5.13.3 All weld surfaces are liquid penetrant examined in6 for post weld heat treatment.accordance with Appendix 8 of Section VIII,Division 1 of the5.14.1 Class WP-W-Radiographic inspection of the weld isASME Boiler and Pressure Vessel Code,andrequired(see 5.4).3