1、Designation: A 815/A 815M 08aStandard 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 () 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, ferr
3、itic/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 into
4、 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 c
5、lass 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 n
7、ot 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 Defi
10、nitions 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 Steel
11、sA 923 Test Methods for Detecting Detrimental IntermetallicPhase in Duplex Austenitic/Ferritic Stainless SteelsA 960/A 960M Specification for Common Requirementsfor Wrought Steel Piping FittingsE 165 Test Method for Liquid Penetrant Examination2.2 ASME Standards:3B16.9 Factory-Made Wrought Butt-Weld
12、ing FittingsB16.11 Forged Fittings, Socket-Welding and Threaded2.3 MSS Standards:4MSS SP-43 Standard Practice 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
13、.4 ASME Boiler and Pressure Vessel Codes:3Section VIII Division I, Pressure Vessels1This specification 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
14、Applications and BoltingMaterials for Piping and Special Purpose Applications.Current edition approved May 1, 2008. Published June 2008. Originallyapproved in 1983. Last previous edition approved in 2008 as A 815/A 815M 08.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orconta
15、ct ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, 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,
16、 http:/www.asme.org.4Available from Manufacturers Standardization Society of the Valve and FittingsIndustry (MSS), 127 Park St., NE, Vienna, VA 22180-4602, http:/www.mss-.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C7
17、00, West Conshohocken, PA 19428-2959, United States.2.5 ASNT Standard:5SNT-TC-1A Recommended Practice for NondestructiveTesting Personnel Qualification and Certification3. Common Requirements and Ordering Information3.1 Material furnished to this specification shall conform tothe requirements of Spe
18、cificationA 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 between this specificationand Specification A 960
19、/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 forgings, bars,plates, or seamless or welded tubular pr
20、oducts that conform tothe chemical requirements in Table 1.4.2 The steel shall be melted by one of the followingprocesses:5Available fromAmerican Society for Nondestructive Testing (ASNT), P.O. Box28518, 1711 Arlingate Ln., Columbus, OH 43228-0518, http:/www.asnt.org.TABLE 1 Chemical RequirementsNOT
21、E 1Where an ellipsis (. . .) appears in this table, there is no requirement.Composition, %GradeAGradeWPGradeCRUNSC,maxMnBP,maxS,maxSi,maxNiBCr Mo CuBNBTi OtherFerritic SteelsWP27 CR27 S44627 0.010 0.75 0.020 0.020 0.40 0.50 25.027.50.751.500.20 0.015 . . . Cb0.050.20WP33 CR33 S44626 0.06 0.75 0.040
22、0.020 0.75 0.50 25.027.00.751.500.20 0.040 0.201.00(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 S4
23、4600 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. .WPS32202 CRS32202 S32202 0.030
24、2.00 0.040 0.010 1.00 1.002.8021.524.00.45 . . . 0.180.26. .WPS32750 CRS32750 S32750 0.030 1.20 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
25、.026.0C3.04.0C0.501.000.200.30C. W0.501.00WPS39274 CRS39724 S32974 0.030 1.00 0.030 0.020 0.80 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 4.56.522.02
26、3.03.03.5. . . 0.140.20. .Martensitic SteelsWP410 CR410 S41000 0.15 1.00 0.040 0.030 1.00 0.50max11.513.5. . . . .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 devel
27、oped and applied by ASTM International.BMaximum unless otherwise indicated.C%Cr+3.33 %Mo+163 %N=40min.A 815/A 815M 08a24.2.1 Electric furnace (with separate degassing and refiningoptional),4.2.2 Vacuum furnace, or4.2.3 Electric furnace followed by vacuum or electroslag-consumable remelting.4.3 If se
28、condary 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, pressing, piercing, extruding, upsetting,rolling, bending, fusion welding, machining or by combinationof two or more
29、 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 classes of fittings shall be heat treated in accordancewith Section 6.5.3 Fittings ordered as Class WP-S shall be
30、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) shall have allwelds made by the fitting manufacturer and all pipe weldsmade with the addition of filler metal rad
31、iographically 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 radiography ofthe starting pipe weld if the pipe was welded without theaddition of filler metal. In place of radio
32、graphic 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 meet the re-quirements of Specification A 960/A 960M and shall have allwelds, whether made by the fitting manufactu
33、rer or the startingmaterial manufacturer, radiographically examined throughouttheir entire length in accordance with Paragraph UW-51 ofSection VIII, Division I of the ASME Boiler and PressureVessel Code. The radiography of welds for this class of fittingscan be done either prior to or after forming
34、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 manufacturer or the startingmaterial manufacturer, ultrasonically examined throughouttheir entire length in accordance
35、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 the manufacturer, eitherprior to or after forming.5.8 Personnel performing NDE examinations shall be quali-fied in
36、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 examination.5.10 All classes of fittings shall have the welders, weldingoperators, and welded procedures qualified
37、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 filler metal shall be finished inaccordance with the requirements of Paragraph UW-35 (a) ofSection VIII, Division
38、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 penetrant in accordance with Practice E 165.5.13 Weld buildup is permitted to dimensionally correctunfilled areas produced
39、 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 welders or welding opera-tors meet the requirements of 5.10,5.13.2 Heat-treatment is performed after welding and p
40、riorto 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 Repair 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 produc
41、ed with the entire lap added asweld metal to a straight pipe section provided the weldingsatisfies the requirements of 5.10 for qualifications and 6.3 forpost weld heat treatment.5.14.1 Class WP-WRadiographic inspection of the weldis required (see 5.4).5.14.2 Class WP-WXRadiographic inspection of al
42、l 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 may be produced with the entire lap addedby the welding of a ring, made from plate or bar of the samealloy grade
43、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 6.3 for post weld heat treatment.5.15.1 Class WP-WRadiographic inspection of all welds,made with the addition of fi
44、ller 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-WUUltrasonic inspection of all welds,made with or without the addition of filler metal, is required(see 5.6).5.15.4 Class CR
45、Nondestructive examination is not re-quired (see 5.9).6. Heat Treatment6.1 Unless otherwise stated herein, heat treatment shall beperformed after welding and in accordance with the require-ments of Table 2.6.1.1 No final heat treatment of welded fittings (HT-O)fabricated from ferritic/austenitic pla
46、te that has been heatA 815/A 815M 08a3treated as required by Table 2 for the particular grade, isrequired, provided material representative of the fittings, in-cluding base metal, weld metal, and heat affected zone, passesa Test Methods A 923 Method B or C (See Note 1) corrosionevaluation per heat.
47、Each fitting supplied under this require-ment shall be stenciled with the suffix HT-O.6.1.2 For materials not listed in Table 3 of Test MethodsA 923, the HT-O provision does not apply.6.2 All fittings shall be heat treated in accordance with therequirements specified in Table 2.NOTE 1The Test Method
48、s A 923 test method (B or C) is at themanufacturers option, unless otherwise specified by the purchaser.6.3 All welding shall be done prior to the heat treatmentspecified in Table 2.6.4 All fittings machined directly from forgings or bars (see5.12), previously heat treated in accordance with the req
49、uire-ments specified in Table 2, need not be reheat treated.7. Chemical Composition7.1 The chemical composition 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 DefinitionsA 751. Product analy-sis tolerances in accordance with Table 3 are applicable.7.2 Exce
