1、Designation: A 815/A 815M 07aStandard Specification forWrought Ferritic, Ferritic/Austenitic, and MartensiticStainless Steel Piping Fittings1This standard is issued under the fixed designationA 815/A 815M; the number immediately following the designation indicates the yearof original adoption or, in
2、 the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers two general classes, WP andCR, of wrought ferritic, fer
3、ritic/austenitic, and martensiticstainless steel fittings of seamless and welded constructioncovered by the latest revision of Specification A 960/A 960M.Fittings differing from these standards may be furnished inaccordance with Supplementary Requirement S8.1.1.1 Class WP fittings are subdivided int
4、o four subclasses:Classes WP-S, WP-W, WP-WX, and WP-WU. They aremanufactured to the requirements of Specification A 960/A 960M, and they shall have pressure ratings compatible with12.2. Class WP-S fittings are those manufactured from seam-less product by a seamless method of manufacture (markedwith
5、class symbol WP-S); Class WP-W fittings are those whichcontain welds where the fitting fabrication or constructionwelds have been radiographed (marked with class symbolWP-W); and Class WP-WX fittings are those which containwelds where all welds have been radiographed (marked withclass symbol WP-WX);
6、 and Class WP-WU fittings are thosewhich contain welds where all welds have been ultrasonicallytested (marked with class symbol WP-WU).1.1.2 Class CR fittings are those manufactured to therequirements of MSS SP-43, and they shall have pressureratings compatible with 12.3.1.2 This specification does
7、not apply to cast fittings.1.3 Optional supplementary requirements are provided.When desired, one or more of these may be specified in theorder.1.4 This specification is expressed in both inch-pound unitsand in SI units. However, unless the order specifies theapplicable “M” specification designation
8、 SI units, the mate-rial shall be furnished to inch-pound units.1.5 The values stated in either inch-pound units or SI unitsare to be regarded separately as standard. Within the text, theSI units are shown in brackets. The values stated in eachsystem are not exact equivalents; therefore, each system
9、 mustbe used independently of the other. Combining values from thetwo systems may result in nonconformance with the specifi-cation.2. Referenced Documents2.1 ASTM Standards:2A 262 Practices for Detecting Susceptibility to Intergranu-lar Attack in Austenitic Stainless SteelsA 370 Test Methods and Def
10、initions for Mechanical Testingof Steel ProductsA 388/A 388M Practice for Ultrasonic Examination ofHeavy Steel ForgingsA 751 Test Methods, Practices, and Terminology forChemical Analysis of Steel ProductsA 763 Practices for Detecting Susceptibility to Intergranu-lar Attack in Ferritic Stainless Stee
11、lsA 960/A 960M Specification for Common Requirementsfor Wrought Steel Piping FittingsE 165 Test Method for Liquid Penetrant Examination2.2 ASME Standards:3B16.9 Wrought Steel Butt-Welding FittingsB16.11 Forged Steel Fittings, Socket-Welding and Threaded2.3 MSS Standards:4MSS SP-43 Standard Practice
12、for Light Weight StainlessSteel Butt-Welding FittingsMSS SP-79 Socket-Welding Reducer InsertsMSS SP-83 Steel Pipe Unions, Socket-Welding andThreadedMSS SP-95 Swage(d) Nipples and Bull Plugs2.4 ASME Boiler and Pressure Vessel Codes:3Section VIII Division I, Pressure Vessels2.5 ASNT Standard:51This sp
13、ecification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.22 on Steel Forgings and Wrought Fittings for Piping Applications and BoltingMaterials for Piping and Special Purpose Applications.Current editi
14、on approved Sept. 1, 2007. Published October 2007. Originallyapproved in 1983. Last previous edition approved in 2007 as A 815/A 815M 07.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume i
15、nformation, refer to the standards Document Summary page onthe ASTM website.3Available from American Society of Mechanical Engineers (ASME), ASMEInternational Headquarters, Three Park Ave., New York, NY 10016-5990, http:/www.asme.org.4Available from Manufacturers Standardization Society of the Valve
16、 and FittingsIndustry (MSS), 127 Park St., NE, Vienna, VA 22180-4602, http:/www.mss-.5Available fromAmerican Society for Nondestructive Testing (ASNT), P.O. Box28518, 1711 Arlingate Ln., Columbus, OH 43228-0518, http:/www.asnt.org.1*A Summary of Changes section appears at the end of this standard.Co
17、pyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.SNT-TC-1A(1984) Recommended Practice for Nondestruc-tive Testing Personnel Qualification and Certification3. Common Requirements and Ordering Information3.1 Material furnished to this spec
18、ification shall conform tothe requirements of SpecificationA 960/A 960M including anysupplementary requirements that are indicated in the purchaseorder. Failure to comply with the common requirements ofSpecification A 960/A 960M constitutes nonconformance withthis specification. In case of conflict
19、between this specificationand Specification A 960/A 960M, this specification shall pre-vail.3.2 Specification A 960/A 960M identifies the ordering in-formation that should be complied with when purchasingmaterial to this specification.4. Materials4.1 The material for fittings shall consist of forgin
20、gs, bars,plates, or seamless or welded tubular products that conform tothe chemical requirements in Table 1.4.2 The steel shall be melted by one of the followingprocesses:4.2.1 Electric furnace (with separate degassing and refiningoptional),4.2.2 Vacuum furnace, orTABLE 1 Chemical RequirementsNOTE 1
21、Where an ellipsis (. . .) appears in this table, there is no requirement.Composition, %GradeAGradeWPGradeCRUNSC,maxMnBP,maxS,maxSi,maxNiBCr MoCu,maxN Ti OtherFerritic SteelsWP27 CR27 S44627 0.010 0.75 0.020 0.020 0.40 0.50 25.027.50.751.500.20 0.015max. Cb0.050.20WP33 CR33 S44626 0.06 0.75 0.040 0.0
22、20 0.75 0.50 25.027.00.751.500.20 0.040max0.201.00(73(C+N) min.WP429 CR429 S42900 0.12 1.0 0.040 0.030 0.75 0.50 14.016.0. . . . .WP430 CR430 S43000 0.12 1.00 0.040 0.030 1.00 0.50 16.018.0. . . . .WP430TI CR430Ti S43036 0.10 1.00 0.040 0.030 1.00 0.75 16.019.5. . . (53C) min 0.75max.WP446 CR446 S44
23、600 0.20 1.50 0.040 0.030 0.75 0.50 23.027.0. . 0.25 . .Ferritic/Austenitic SteelsWPS31803 CRS31803 S31803 0.030 2.00 0.030 0.020 1.0 4.56.521.023.02.53.5. . . 0.080.20. .WPS32101 CRS32101 S32101 0.040 4.06.00.040 0.030 1.00 1.351.7021.022.00.100.800.100.800.200.25. .WPS32750 CRS32750 S32750 0.030 1
24、.20 0.035 0.020 0.8 6.08.024.026.03.05.00.5 0.240.32. .WPS32950 CRS32950 S32950 0.030 2.00 0.035 0.010 0.60 3.55.226.029.01.002.50. . . 0.150.35. .WPS32760 CRS32760 S32760 0.030 1.00 0.030 0.010 1.00 6.08.024.026.0C3.04.0C0.501.000.200.30C. W0.501.00WPS39274 CRS39724 S32974 0.030 1.00 0.030 0.020 0.
25、80 6.08.024.026.02.503.50C0.200.800.240.32. W1.502.50WPS32550 CRS32550 S32550 0.04 1.50 0.040 0.030 1.00 4.56.524.027.02.93.91.502.500.100.25. .WPS32205 CRS32205 S32205 0.030 2.00 0.030 0.020 1.00 4.56.522.023.03.03.5. . . 0.140.20. .Martensitic SteelsWP410 CR410 S41000 0.15 1.00 0.040 0.030 1.00 0.
26、50max11.513.5. . . . .WPS41008 CRS41008 S41008 0.08 1.00 0.040 0.030 1.00 0.60 11.513.5. . . . .WPS41500 CRS41500 S41500 0.05 0.501.000.030 0.030 0.60 3.55.511.514.00.501.00. . . W0.501.00ANaming system developed and applied by ASTM International.BMaximum unless otherwise indicated.C%Cr+3.33 %Mo+163
27、 %N=40min.A 815/A 815M 07a24.2.3 Electric furnace followed by vacuum or electroslag-consumable remelting.4.3 If secondary melting is employed, the heat shall bedefined as all ingots remelted from a primary heat.5. Manufacture5.1 FormingForging or shaping operations may be per-formed by hammering, pr
28、essing, piercing, extruding, upsetting,rolling, bending, fusion welding, machining or by combinationof two or more of these operations. The forming procedureshall be so applied that it will not produce surface discontinui-ties deeper than 5 % of the specified nominal thickness of thefitting.5.2 All
29、classes of fittings shall be heat treated in accordancewith Section 6.5.3 Fittings ordered as Class WP-S shall be of seamlessconstruction and shall meet all requirements of SpecificationA 960/A 960M.5.4 Fittings ordered as Class WP-W shall meet the require-ments of Specification A 960/A 960M and (1)
30、 shall have allwelds made by the fitting manufacturer and all pipe weldsmade with the addition of filler metal radiographically exam-ined throughout the entire length in accordance with ParagraphUW-51 of Section VIII, Division 1, of the ASME Boiler andPressure Vessel Code; and (2) shall not require
31、radiography ofthe starting pipe weld if the pipe was welded without theaddition of filler metal. In place of radiographic examination,welds made by the fitting manufacturer may be ultrasonicallyexamined in accordance with the code requirements stated in5.6.5.5 Fittings ordered as Class WP-WX shall m
32、eet the re-quirements of Specification A 960/A 960M and shall have allwelds, whether made by the fitting manufacturer or the startingmaterial manufacturer, radiographically examined throughouttheir entire length in accordance with Paragraph UW-51 ofSection VIII, Division I of the ASME Boiler and Pre
33、ssureVessel Code. The radiography of welds for this class of fittingscan be done either prior to or after forming at the option of themanufacturer.5.6 Fittings ordered as Class WP-WU shall meet the re-quirements of Specification A 960/A 960M and shall have allwelds, whether made by the fitting manuf
34、acturer or the startingmaterial manufacturer, ultrasonically examined throughouttheir entire length in accordance with Appendix 12 of SectionVIII, Division 1 of ASME Boiler and Pressure Vessel Code.5.7 The radiography or ultrasonic examination for this classof fittings may be done at the option of t
35、he manufacturer, eitherprior to or after forming.5.8 Personnel performing NDE examinations shall be quali-fied in accordance with SNT-TC-1A.5.9 Fittings covered in Specification A 960/A 960M andordered as CR shall meet the requirements of SpecificationA 960/A 960M and do not require nondestructive e
36、xamination.5.10 All classes of fittings shall have the welders, weldingoperators, and welded procedures qualified under the provi-sions of Specification A 960/A 960M except that starting pipewelds made without the addition of filler metal do not requiresuch qualification.5.11 All joints welded with
37、filler metal shall be finished inaccordance with the requirements of Paragraph UW-35 (a) ofSection VIII, Division 1, of the ASME Boiler and PressureVessel Code.5.12 Fittings machined from bar shall be restricted to NPS 4or smaller.5.12.1 All caps machined from bar shall be examined byliquid penetran
38、t in accordance with Practice E 165.5.13 Weld buildup is permitted to dimensionally correctunfilled areas produced during cold forming of stub ends.Radiographic examination of the weld buildup shall not berequired provided that all of the following steps are adhered to:5.13.1 The weld procedure and
39、welders or welding opera-tors meet the requirements of 5.10,5.13.2 Heat-treatment is performed after welding and priorto machining,5.13.3 All weld surfaces are liquid penetrant examined inaccordance with Appendix 8 of Section VIII, Division 1 of theASME Boiler and Pressure Vessel Code, and5.13.4 Rep
40、air of areas in the weld is permitted, but 5.13.1,5.13.2, and 5.13.3 must be repeated.5.14 Stub ends may be produced with the entire lap added asweld metal to a straight pipe section provided the weldingsatisfies the requirements of 5.10 for qualifications and 6.2 forpost weld heat treatment.5.14.1
41、Class WP-WRadiographic inspection of the weldis required (see 5.4).5.14.2 Class WP-WXRadiographic inspection of all weldsis required (see 5.5).5.14.3 Class WP-WUUltrasonic inspection of all welds isrequired (see 5.6).5.14.4 Class CRNondestructive examination is not re-quired (see 5.9).5.15 Stub ends
42、 may be produced with the entire lap addedby the welding of a ring, made from plate or bar of the samealloy grade and composition, to the outside of a straight sectionof pipe, provided the weld is double welded, is a fullpenetration joint, satisfies the requirements of 5.10 for quali-fications and 6
43、.2 for post weld heat treatment.5.15.1 Class WP-WRadiographic inspection of all welds,made with the addition of filler metal is required (see 5.4).5.15.2 Class WP-WXRadiographic inspection of allwelds, made with or without the addition of filler metal, isrequired (see 5.5).5.15.3 Class WP-WUUltrason
44、ic inspection of all welds,made with or without the addition of filler metal, is required(see 5.6).5.15.4 Class CRNondestructive examination is not re-quired (see 5.9).6. Heat Treatment6.1 All fittings shall be heat treated in accordance with therequirements specified in Table 2.6.2 All welding shal
45、l be done prior to the heat treatmentspecified in Table 2.6.3 All fittings machined directly from forgings or bars (see5.12), previously heat treated in accordance with the require-ments specified in Table 2, need not be reheat treated.A 815/A 815M 07a37. Chemical Composition7.1 The chemical composi
46、tion of each cast or heat shall bedetermined and shall conform to the requirements of thechemical composition for the respective grades of materialslisted in Table 1. Methods and practices relating to chemicalanalyses required by this specification shall be in accordancewith Methods, Practices, and
47、DefinitionsA 751. Product analy-sis tolerances in accordance with Table 3 are applicable.7.2 Except as listed below, in fittings of welded construc-tion, the composition of the deposited weld shall conform tothe same requirements as the base metal.7.2.1 Welds on S32950 base metal shall be made withn
48、ominal 26 % Cr, 8 % Ni, 2 % Mo weld metal.7.2.2 Welds on S31803 base metal shall conform to thesame requirements as the base metal or shall be made withnominal 22 % Cr, 8 to 10 % Ni, 3 % Mo weld metal.8. Tensile Requirements Tensile Requirements8.1 The tensile properties of the fitting material shal
49、l con-form to the requirements of Table 4. The testing and reportingshall be performed in accordance with Test Methods andDefinitions A 370.8.2 At least one tension test per heat shall be made onmaterial representative of the fitting, including weld metalwhen filler metal is added, and in the same condition of heattreatment as the finished fitting it represents.8.3 The fittings manufacturer shall perform a tensile test onmaterial representative of the finished fitting. Records of thetensile test made on t
