1、Designation: A 403/A 403M 07Standard Specification forWrought Austenitic Stainless Steel Piping Fittings1This standard is issued under the fixed designationA 403/A 403M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of l
2、ast 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.This standard has been approved for use by agencies of the Department of Defense.1. Scope*1.1 This specification covers wrought st
3、ainless steel fittingsfor pressure piping applications.21.2 Several grades of austenitic stainless steel alloys areincluded in this specification Grades are designated with aprefix, WP or CR, based on the applicable ASME or MSSdimensional and rating standards, respectively.1.3 For each of the WP sta
4、inless grades, several classes offittings are covered, to indicate whether seamless or weldedconstruction was utilized. Class designations are also utilizedto indicate the nondestructive test method and extent ofnondestructive examination (NDE). Table 1 is a generalsummary of the fitting classes app
5、licable to all WP grades ofstainless steel covered by this specification. There are noclasses for the CR grades. Specific requirements are coveredelsewhere.1.4 This specification is expressed in both inch-pound unitsand in SI units. However, unless the order specifies theapplicable “M” specification
6、 designation (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; therefor
7、e, each system mustbe used independently of the other. Combining values from thetwo systems may result in nonconformance with the specifi-cation.1.6 This specification does not apply to cast steel fittings.Austenitic stainless steel castings are covered in SpecificationsA 351/A 351M, A 743/A 743M, a
8、nd A 744/A 744M.2. Referenced Documents2.1 ASTM Standards:3A 351/A 351M Specification for Castings, Austenitic, forPressure-Containing PartsA 370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA 480/A 480M Specification for General Requirements forFlat-Rolled Stainless and Heat-
9、Resisting Steel Plate,Sheet, and StripA 743/A 743M Specification for Castings, Iron-Chromium,Iron-Chromium-Nickel, Corrosion Resistant, for GeneralApplicationA 744/A 744M Specification for Castings, Iron-Chromium-Nickel, Corrosion Resistant, for Severe ServiceA 751 Test Methods, Practices, and Termi
10、nology forChemical Analysis of Steel ProductsA 960/A 960M Specification for Common Requirementsfor Wrought Steel Piping FittingsE112 Test Methods for Determining Average Grain SizeE 165 Test Method for Liquid Penetrant Examination2.2 ASME Standards:4ASME B16.9 Factory-Made Wrought Steel Butt-Welding
11、FittingsASME B16.11 Forged Steel Fittings, Socket-Welding andThreaded2.3 MSS Standards:5MSS SP-25 Standard Marking System for Valves, Fittings,Flanges, and UnionsMSS SP-43 Standard Practice for Light Weight StainlessSteel Butt-Welding FittingsMSS SP-79 Socket-Welding Reducer Inserts1This specificati
12、on 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 PipingApplications and BoltingMaterials for Piping and Special Purpose Applications.Current edition approve
13、d April 1, 2007. Published May 2007. Originallyapproved in 1956. Last previous edition approved in 2006 as A 403/A 403M-06.2For ASME Boiler and Pressure Vessel Code applications see related Specifi-cation SA-403 in Section II of that Code.3For referenced ASTM standards, visit the ASTM website, www.a
14、stm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.4Available from American Society of Mechanical Engineers (ASME), ASMEInternational Headquarters, Three Park Ave., New York
15、, NY 10016-5990, http:/www.asme.org.5Available 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
16、Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.MSS SP-83 Steel Pipe Unions, Socket-Welding andThreadedMSS SP-95 Swage(d) Nipples and Bull Plugs2.4 ASME Boiler and Pressure Vessel Code:4Section VIII Division I, Pressure VesselsSection IX, Welding Qualifications2.5 AWS Standards:6
17、A 5.4 Specification for Corrosion-Resisting Chromium andChromium-Nickel Steel Covered Welding ElectrodesA 5.9 Specification for Corrosion-Resisting Chromium andChromium-Nickel Steel Welding Rods and Bare Elec-trodes2.6 ASNT:7SNT-TC-1A (1984) Recommended Practice for Nonde-structive Testing Personnel
18、 Qualification and Certification3. Common Requirements and Ordering Information3.1 Material furnished to this specification shall conform tothe requirements of SpecificationA 960/A 960M including anysupplementary requirements that are indicated in the purchaseorder. Failure to comply with the common
19、 requirements ofSpecification A 960/A 960M constitutes nonconformance withthis specification. In case of conflict 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 wi
20、th when purchasingmaterial to this specification.4. Material4.1 The material for fittings shall consist of forgings, bars,plates, or seamless or welded tubular products that conform tothe chemical requirements in Table 2. See Table 3 for a list ofcommon names.4.2 The steel shall be melted by one of
21、the followingprocesses:4.2.1 Electric furnace (with separate degassing and refiningoptional),4.2.2 Vacuum furnace, or4.2.3 One of the former 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 hea
22、t.5. Manufacture5.1 FormingForging or shaping operations may be per-formed by hammering, pressing, piercing, extruding, upsetting,rolling, bending, fusion welding, machining, or by a combina-tion of two or more of these operations. The forming procedureshall be so applied that it will not produce in
23、jurious defects inthe fittings.5.2 All fittings shall be heat treated in accordance withSection 6.5.3 Grade WP fittings ordered as Class S shall be ofseamless construction and shall meet all requirements ofASME B16.9, ASME B16.11, MSS SP-79, MSS SP-83,orMSS SP-95.5.4 Grade WP fittings ordered as Cla
24、ss W shall meet therequirements of ASME B16.9 and:5.4.1 Shall have all pipe welds made by mill or the fittingmanufacturer with the addition of filler metal radiographicallyexamined throughout the entire length in accordance with theCode requirements stated in 5.5, and,5.4.2 Radiographic inspection i
25、s not required on singlelongitudinal seam welds made by the starting pipe manufac-turer if made without the addition of filler metal; and5.4.3 Radiographic inspection is not required on longitudi-nal seam fusion welds made by the fitting manufacturer whenall of the following conditions have been met
26、:5.4.3.1 No addition of filler metal,5.4.3.2 Only one welding pass per weld seam, and,5.4.3.3 Fusion welding from one side only.5.4.4 In place of radiographic examination, welds made bythe fitting manufacturer may be ultrasonically examined inaccordance with the Code requirements stated in 5.6.5.5 G
27、rade WP fittings ordered as Class WX shall meet therequirements of ASME B16.9 and shall have all welds,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,
28、 of the ASME Boiler and PressureVessel Code.5.6 Grade WP fittings ordered as Class WU shall meet therequirements of ASME B16.9 and shall have all welds,whether made by the fitting manufacturer or the startingmaterial manufacturer, ultrasonically examined throughouttheir entire length in accordance w
29、ith Appendix 12 of SectionVIII, Division 1 of ASME Boiler and Pressure Vessel Code.5.7 The radiography or ultrasonic examination of welds forthis class of fittings may be done at the option of themanufacturer, either prior to or after forming.5.8 Personnel performing NDE examinations shall be quali-
30、fied in accordance with SNT-TC-1A.5.9 Grade CR fittings shall meet the requirements of MSSSP-43 and do not require nondestructive examination.5.10 All fittings shall have the welders, welding operators,and welding procedures qualified under the provisions ofSection IX of the ASME Boiler and Pressure
31、 Vessel Codeexcept that starting pipe welds made without the addition offiller metal do not require such qualification.6Available from American Welding Society (AWS), 550 NW LeJeune Rd.,Miami, FL 33126, http:/www.aws.org.7Available fromAmerican Society for Nondestructive Testing (ASNT), P.O. Box2851
32、8, 1711 Arlingate Ln., Columbus, OH 43228-0518, http:/www.asnt.org.TABLE 1 Fitting Classes for WP GradesClass Construction Nondestructive ExaminationS Seamless NoneW Welded Radiography or UltrasonicWX Welded RadiographyWU Welded UltrasonicA 403/A 403M 0725.11 All joints welded with filler metal shal
33、l be finished inaccordance with the requirements of Paragraph UW-35 (a) ofSection VIII, Division I, of the ASME Boiler and PressureVessel Code.5.12 Fittings machined from bar shall be restricted to NPS 4or smaller. Elbows, return bends, tees, and header tees shall notbe machined directly from bar st
34、ock.5.12.1 All caps machined from bar shall be examined byliquid penetrant in accordance with Supplementary Require-ment S52 in Specification A 960/A 960M.5.13 Weld buildup is permitted to dimensionally correctunfilled areas produced during cold forming of stub ends.Radiographic examination of the w
35、eld buildup shall not berequired provided that all the following steps are adhered to:TABLE 2 Chemical RequirementsNOTE 1Where an ellipsis (.) appears in this table, there is no requirement.GradeAComposition, %Grade WP Grade CR UNS Des-ignationCBMnBPBSBSiBNi Cr Mo Ti N2CCOthersWPXM-19 CRXM-19 S20910
36、 0.06 4.06.0 0.045 0.030 1.00 11.513.5 20.523.5 1.503.00 . . . 0.200.40DWP304 CR304 S30400 0.08 2.00 0.045 0.030 1.00 8.011.0 18.020.0 . . . . . . . . . . . .WP304L CR304L S30403 0.030E2.00 0.045 0.030 1.00 8.012.0 18.020.0 . . . . . . . . . . . .WP304H CR304H S30409 0.040.10 2.00 0.045 0.030 1.00 8
37、.011.0 18.020.0 . . . . . . . . . . . .WP304N CR304N S30451 0.08 2.00 0.045 0.030 1.00 8.011.0 18.020.0 . . . . . . 0.100.16.WP304LN CR304LN S30453 0.030 2.00 0.045 0.030 1.00 8.011.0 18.020.0 . . . . . . 0.100.16.WP309 CR309 S30900 0.20 2.00 0.045 0.030 1.00 12.015.0 22.024.0 . . . . . . . . . . .
38、.WP310S CR310S S31008 0.08 2.00 0.045 0.030 1.00 19.022.0 24.026.0 . . . . . . . . . . . .WPS31254 CRS31254 S31254 0.020 1.00 0.030 0.010 0.80 17.518.5 19.520.5 6.06.5 . . . 0.180.22Cu 0.501.00WP316 CR316 S31600 0.08 2.00 0.045 0.030 1.00 10.014.0 16.018.0 2.003.00 . . . . . . . . .WP316L CR316L S31
39、603 0.030E2.00 0.045 0.030 1.00 10.014.0F16.018.0 2.003.00 . . . . . . . . .WP316H CR316H S31609 0.040.10 2.00 0.045 0.030 1.00 10.014.0 16.018.0 2.00-3.00 . . . . . . . . .WP316N CR316N S31651 0.08 2.00 0.045 0.030 1.00 10.013.0 16.018.0 2.003.00 . . . 0.10-0.16.WP316LN CR316LN S31653 0.030 2.00 0.
40、045 0.030 1.00 10.013.0 16.018.0 2.003.00 . . . 0.100.16.WP317 CR317 S31700 0.08 2.00 0.045 0.030 1.00 11.015.0 18.020.0 3.04.0 . . . . . . . . .WP317L CR317L S31703 0.030 2.00 0.045 0.030 1.00 11.015.0 18.020.0 3.04.0 . . . . . . . . .WPS31725 CRS31725 S31725 0.030 2.00 0.045 0.030 1.00 13.517.5 18
41、.020.0 4.05.0 . . . 0.20 . . .WPS31726 CRS31726 S31726 0.030 2.00 0.045 0.030 1.00 13.517.5 17.020.0 4.05.0 . . . 0.100.20.WP321 CR321 S32100 0.08 2.00 0.045 0.030 1.00 9.012.0 17.019.0 . . .G. .WP321H CR321H S32109 0.040.10 2.00 0.045 0.030 1.00 9.012.0 17.019.0 . . .H. .WPS33228 CRS33228 S33228 0.
42、040.08 1.00 0.020 0.015 0.30 31.033.0 26.028.0 . . . . . . . . . Ce 0.050.10Al 0.025Cb 0.61.0WPS34565 CRS34565 S34565 0.030 5.07.0 0.030 0.010 1.00 16.018.0 23.025.0 4.05.0 . . . 0.400.60Cb 0.10WP347 CR347 S34700 0.08 2.00 0.045 0.030 1.00 9.012.0 17.019.0 . . . . . . . . .IWP347H CR347H S34709 0.04
43、0.10 2.00 0.045 0.030 1.00 9.012.0 17.019.0 . . . . . . . . .JWP348 CR348 S34800 0.08 2.00 0.045 0.030 1.00 9.012.0 17.019.0 . . . . . . . . . Cb+Ta=103(C)1.10Ta 0.10Co 0.20WP348H CR348H S34809 0.040.10 2.00 0.045 0.030 1.00 9.012.0 17.019.0 . . . . . . . . . Cb+Ta=83(C)1.10Ta 0.10Co 0.20WPS38815 CR
44、S38815 S38815 0.030 2.00 0.040 0.020 5.5-6.5 13.0-17.0 13.0-15.0 0.75-1.50 . . . . . . Cu 0.75-1.50Al 0.30ASee Section 15 for marking requirements.BMaximum, unless otherwise indicated.CThe method of analysis for nitrogen shall be a matter of agreement between the purchaser and manufacturer.DColumbiu
45、m 0.100.30 %; Vanadium, 0.100.30 %.EFor small diameter or thin walls, or both, where many drawing passes are required, a carbon maximum of 0.040 % is necessary in grades TP304L and TP316L. Smalloutside diameter tubes are defined as those less than 0.500 in. 12.7 mm in outside diameter and light wall
46、 tubes as those less than 0.049 in. 1.24 mm in average wallthickness.FOn pierced tubing, the nickel may be 11.016.0 %.G5X(C+N2)0.70.H4X(C+N2)0.70.IThe columbium content shall be not less than ten times the carbon content and not more than 1.10 %.JThe columbium content shall be not less than eight ti
47、mes the carbon content and not more than 1.10 %.A 403/A 403M 0735.13.1 The weld procedure and welders or welding opera-tors meet the requirements of 5.10.5.13.2 Annealing is performed after welding and prior tomachining.5.13.3 All weld surfaces are liquid penetrant examined inaccordance with Appendi
48、x 8 of Section VIII, Division 1 of theASME Boiler and Pressure Vessel Code.5.13.4 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 produced with the entire lap added asweld metal to a straight pipe section provided the weldingsatisfies th
49、e requirements of 5.10 for qualifications and Section6 for post weld heat treatment.5.14.1 Grade WP Class WRadiographic inspection of theweld is required. See 5.4.5.14.2 Grade WP Class WXRadiographic inspection ofall welds is required. See 5.5.5.14.3 Grade WP Class WUUltrasonic inspection of allwelds is required. See 5.6.5.14.4 Grade CRNondestructive examination is not re-quired. See 5.12.1.5.15 Stub ends may be produced with the entire lap addedby the welding of a ring, made f
