1、Designation: A376/A376M 06 (Reapproved 2011)Used in USDOE-NE standardsStandard Specification forSeamless Austenitic Steel Pipe for High-TemperatureCentral-Station Service1This standard is issued under the fixed designation A376/A376M; the number immediately following the designation indicates the ye
2、arof original adoption or, in 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. Scope1.1 This specification2covers seamless austenitic steel pi
3、peintended for high-temperature central-station service. Amongthe grades covered are five H grades and two nitrogen grades(304N and 316N) that are specifically intended for high-temperature service.1.2 Optional supplementary requirements (S1 through S10)are provided. These supplementary requirements
4、 specify addi-tional tests that will be made only when stated in the order,together with the number of such tests required.1.3 Grades TP321 and TP321H have lower strength require-ments for nominal wall thicknesses greater than38 in. 9.5mm.1.4 The values stated in either inch-pound units or SI unitsa
5、re to be regarded separately as standard. Within the text, theSI units are shown in brackets. The values stated in eachsystem may not be exact equivalents; therefore, each systemshall be used independently of the other. Combining valuesfrom the two systems may result in non-conformance with thestand
6、ard. The inch-pound units shall apply unless the “M”designation of this specification is specified in the order.NOTE 1The dimensionless designator NPS (nominal pipe size) hasbeen substituted in this standard for such traditional terms as “nominaldiameter,” “size,” and “nominal size.”2. Referenced Do
7、cuments2.1 ASTM Standards:3A262 Practices for Detecting Susceptibility to IntergranularAttack in Austenitic Stainless SteelsA941 Terminology Relating to Steel, Stainless Steel, Re-lated Alloys, and FerroalloysA999/A999M Specification for General Requirements forAlloy and Stainless Steel PipeE112 Tes
8、t Methods for Determining Average Grain SizeE213 Practice for Ultrasonic Testing of Metal Pipe andTubingE381 Method of Macroetch Testing Steel Bars, Billets,Blooms, and ForgingsE426 Practice for Electromagnetic (Eddy-Current) Exami-nation of Seamless and Welded Tubular Products, Auste-nitic Stainles
9、s Steel and Similar Alloys2.2 Other Standards:SNT-TC-1A Personnel Qualification and Certification inNondestructive Testing43. Terminology3.1 DefinitionsFor definitions of terms used in this speci-fication, refer to Terminology A941.4. Ordering Information4.1 Orders for material to this specification
10、 should includethe following, as required to describe the desired materialadequately:4.1.1 Quantity (feet, centimetres, or number of lengths),4.1.2 Name of material (seamless austenitic steel pipe),4.1.3 Grade (Table 1),4.1.4 Size (nominal size, or outside diameter and schedulenumber or average wall
11、 thickness),4.1.5 Lengths (specific or random), (Permissible Variationsin Length Section of Specification A999/A999M),4.1.6 End finish (Ends Section of Specification A999/A999M),4.1.7 Optional requirements (Section 9) (see HydrostaticTest Requirements Section and the Permissible Variation inWeight f
12、or Seamless Pipe Section for weighing individuallengths, of SpecificationA999/A999M), (see 10.6, repairing bywelding; 14.3, die stamping),4.1.8 Test report required (Certification Section of Specifi-cation A999/A999M),4.1.9 Specification designation, and4.1.10 Special requirements or any supplementa
13、ry require-ments selected, or both.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.10 on Stainless and Alloy Steel Tubular Products.Current edition approved Oct. 1, 2011. Published Mar
14、ch 2012. Originallyapproved in 1954. Last previous edition approved in 2006 as A376/A376M06.DOI: 10.1520/A0376_A0376M-06R11.2For ASME Boiler and Pressure Vessel Code applications see related Specifi-cation SA-376 in Section II of that Code.3For referenced ASTM standards, visit the ASTM website, www.
15、astm.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 fromAmerican Society for Nondestructive Testing (ASNT), P.O. Box28518, 1711 Arlingate Ln., Columbus, OH 43228-
16、0518.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5. General Requirements5.1 Material furnished to this specification shall conform tothe applicable requirements of the current edition of Specifi-cation A999/A999M unless otherwise
17、 provided herein.6. Materials and Manufacture6.1 ManufactureAt the manufacturers option, pipe maybe either hot finished or cold finished, with a suitable finishingtreatment, where necessary.6.2 Heat Treatment:6.2.1 All pipe shall be furnished in the heat-treated condi-tion unless the order specifica
18、lly states that no final heattreatment shall be applied. When the order is furnished withoutfinal heat treatment, each pipe shall be stenciled “HT-O.”6.2.2 As an alternate to final heat treatment in a continuousfurnace or batch-type furnace, immediately following hotforming while the temperature of
19、the pipes is not less than thespecified minimum solution treatment temperature, pipes maybe individually quenched in water or rapidly cooled by othermeans.6.2.3 Grades TP304, TP304N, TP304LN, TP316, TP316N,TP316LN, TP321, TP347, TP348, 16-8-2H, S 31725, andS 31726 Unless otherwise stated in the orde
20、r, heat treatmentshall consist of heating to a minimum temperature of 1900 F1040 C and quenching in water or rapidly cooling by othermeans.6.2.3.1 The purchaser may specify controlled structural orspecial service characteristics which shall be used as a guidefor the most suitable heat treatment. If
21、the final heat treatmentis at a temperature under 1900 F 1040 C, each pipe shall bestenciled with the final heat treatment temperature in degreesFahrenheit or Celsius after the suffix “HT.”6.2.4 Grades TP304H, TP316H, TP321H, TP347H,TP348H, and 16-8-2HIf cold working is involved in pro-cessing, the
22、minimum solution-treating temperature for GradesTP321H, TP347H, and TP348H shall be 2000 F 1100 C, forGrades TP304H and TP316H, 1900 F 1040 C, and forGrade 16-8-2H, 1800 F 980 C. If the material is hot-rolled,the minimum solution-treating temperatures for GradesTP321H, TP347H, and TP348H shall be 19
23、25 F 1050 C,for Grades TP304H and TP316H, 1900 F 1040 C, and forGrade 16-8-2H, 1800 F 980 C.6.2.5 Grade S34565Heat treatment shall consist of heat-ing to a temperature in the range of 2050 F 1120 Cminimum and 2140 F 1170 C maximum, and quenching inwater or rapidly cooling by other means.6.3 A soluti
24、on annealing temperature above 1950 F 1065C may impair the resistance to intergranular corrosion aftersubsequent exposure to sensitizing conditions in TP321,TP321H, TP347, TP347H, TP348, and TP348H. When speci-fied by the purchaser, a lower temperature stabilization orre-solution anneal shall be use
25、d subsequent to the initial hightemperature solution anneal (see Supplementary RequirementS9).6.4 The grain size of grades 304H, 316H, 321H, 347H, and348H as determined in accordance with Test Methods E112,shall be No. 7 or coarser.7. Chemical Composition7.1 The steel shall conform to the requiremen
26、ts as tochemical composition prescribed in Table 1.8. Product Analysis8.1 At the request of the purchaser, an analysis of one billetfrom each heat or two pipes from each lot (Note 2) shall bemade by the manufacturer. A lot of pipe shall consist of thefollowing:TABLE 1 Chemical RequirementsGradeUNSDe
27、sig-nationComposition,%Carbon Man-ganese,maxPhos-phorus,maxSul-fur,maxSili-con,maxNickel Chromium Molyb-denumTita-niumColum-biumTan-talumNitro-genAOthersTP304 S30400 0.08 max 2.00 0.045 0.030 0.75 8.011.0 18.020.0 . . . . . . . . . . . . . . . . . .TP304H S30409 0.040.10 2.00 0.045 0.030 0.75 8.011.
28、0 18.020.0 . . . . . . . . . . . . . . . . . .TP304N S30451 0.08 max 2.00 0.045 0.030 0.75 8.011.0 18.020.0 . . . . . . . . . . . . 0.100.16 . . .TP304LN S30453 0.035 max 2.00 0.045 0.030 0.75 8.011.0 18.020.0 . . . . . . . . . . . . 0.100.16 . . .TP316 S31600 0.08 max 2.00 0.045 0.030 0.75 11.014.0
29、 16.018.0 2.003.00 . . . . . . . . . . . . . . .TP316H S31609 0.040.10 2.00 0.045 0.030 0.75 11.014.0 16.018.0 2.003.00 . . . . . . . . . . . . . . .TP316N S31651 0.08 max 2.00 0.045 0.030 0.75 11.014.0 16.018.0 2.003.00 . . . . . . . . . 0.100.16 . . .TP316LN S31653 0.035 max 2.00 0.045 0.030 0.75
30、11.014.0 16.018.0 2.003.00 . . . . . . . . . 0.100.16 . . .TP321 S32100 0.08 max 2.00 0.045 0.030 0.75 9.013.0 17.019.0 . . .B. . . .TP321H S32109 0.040.10 2.00 0.045 0.030 0.75 9.013.0 17.019.0 . . .C. . . .TP347 S34700 0.08 max 2.00 0.045 0.030 0.75 9.013.0 17.019.0 . . . . . .D. . .TP347H S34709
31、0.040.10 2.00 0.045 0.030 0.75 9.013.0 17.019.0 . . . . . .E. . .TP348FS34800 0.08 max 2.00 0.045 0.030 0.75 9.013.0 17.019.0 . . . . . .D0.10 . . . Co 0.20 maxTP348H S34809 0.040.10 2.00 0.045 0.030 1.00 9.013.0 17.019.0E0.1016-8-2H S16800 0.050.10 2.00 0.045 0.030 0.75 7.59.5 14.516.5 1.502.00 . .
32、 . . . . . . . . . . . . . . . S31725 0.030 max 2.00 0.045 0.030 0.75 13.517.5 18.020.0 4.05.0 . . . . . . . . . 0.20 max Cu 0.75 max. . . S31726 0.030 max 2.00 0.045 0.030 0.75 14.517.5 17.020.0 4.05.0 . . . . . . . . . 0.100.20 Cu 0.75 max. . . S34565 0.030 max 5.07.0 0.030 0.010 1.0 16.018.0 23.0
33、25.0 4.05.0 . . . . . . . . . 0.0400.060 Cb 0.10 maxAThe method of analysis for nitrogen shall be a matter of agreement between the purchaser and manufacturer.BThe titanium content shall be not less than five times the carbon content and not more than 0.70 %.CThe titanium content shall be not less t
34、han four times the carbon content and not more than 0.70 %.DThe columbium content shall be not less than ten times the carbon content and not more than 1.10 %.EThe columbium content shall be not less than eight times the carbon content and not more than 1.10 %.FThis grade is intended for special pur
35、pose applications.A376/A376M 06 (2011)2NPS Designator Lengths of Pipe in LotUnder NPS 2 400 or fraction thereofNPS 2 to NPS 5, incl 200 or fraction thereofOver NPS 5 100 or fraction thereofNOTE 2A lot shall consist of the number of lengths specified in 8.1 ofthe same size and wall thickness from any
36、 one heat of steel.8.2 The results of these analyses shall be reported to thepurchaser or the purchasers representative, and shall conformto the requirements specified in Table 1.8.3 If the analysis of one of the tests specified in Section 9does not conform to the requirements specified in Section 7
37、,ananalysis of each billet or pipe from the same heat or lot may bemade, and all billets or pipe conforming to the requirementsshall be accepted.9. Tensile Requirements9.1 The material shall conform to the requirements as totensile properties prescribed in Table 2.10. Workmanship, Finish, and Appear
38、ance10.1 The pipe manufacturer shall explore a sufficient num-ber of visual surface imperfections to provide reasonableassurance that they have been properly evaluated with respectto depth. Exploration of all surface imperfections is notrequired but may be necessary to assure compliance with 10.2.10
39、.2 Surface imperfections that penetrate more than 1212 %of the nominal wall thickness or encroach on the minimumwall thickness shall be considered defects. Pipe with suchdefects shall be given one of the following dispositions:10.2.1 The defect may be removed by grinding providedthat the remaining w
40、all thickness is within specified limits.10.2.2 Repaired in accordance with the repair weldingprovisions of 10.6.10.2.3 The section of pipe containing the defect may be cutoff within the limits of requirements on length.10.2.4 Rejected.10.3 To provide a workmanlike finish and basis for evalu-ating c
41、onformance with 10.2, the pipe manufacturer shallremove by grinding the following:10.3.1 Mechanical marks, abrasions (see Note 3), and pits,any of which imperfections are deeper than116 in. 1.6 mm.NOTE 3Marks and abrasions are defined as cable marks, dinges, guidemarks, roll marks, ball scratches, s
42、cores, die marks, and so forth.10.3.2 Visual imperfections commonly referred to as scabs,seams, laps, tears, or slivers found by exploration in accor-dance with 10.1 to be deeper than 5 % of the nominal wallthickness.10.4 At the purchasers discretion, pipe shall be subject torejection if surface imp
43、erfections acceptable under 10.2 are notscattered, but appear over a large area in excess of what isconsidered a workmanlike finish. Disposition of such pipe shallbe a matter of agreement between the manufacturer and thepurchaser.10.5 When imperfections or defects are removed by grind-ing, a smooth
44、curved surface shall be maintained, and the wallthickness shall not be decreased below that permitted by thisspecification. The outside diameter at the point of grinding maybe reduced by the amount so removed.10.5.1 Wall thickness measurements shall be made with amechanical caliper or with a properl
45、y calibrated nondestructivetesting device of appropriate accuracy. In case of dispute, themeasurement determined by use of the mechanical caliper shallgovern.10.6 Weld repair shall be permitted only subject to theapproval of the purchaser and in accordance with SpecificationA999/A999M.10.7 The finis
46、hed pipe shall be reasonably straight.10.8 The pipe shall be free of scale and contaminating ironparticles. Pickling, blasting, or surface finishing is not manda-tory when pipe is bright annealed. The purchaser may requestthat a passivating treatment be applied.11. Hydrostatic or Nondestructive Elec
47、tric Test11.1 Each pipe shall be subjected to the NondestructiveElectric Test or the Hydrostatic Test. Unless specified by thepurchaser, either test may be used at the option of the producer.11.2 Hydrostatic Test Each length of finished pipe shallbe subjected to the hydrostatic test in accordance wi
48、th Speci-fication A999/A999M, unless specifically exempted under theprovisions of 11.3 and 11.4.11.3 For pipe sizes NPS 24 and over, the purchaser, with theagreement of the manufacturer, may complete the hydrostatictest requirement with the system pressure test, which may belower or higher than the
49、specification test pressure, but in nocase shall the test pressure be lower than the system designpressure. Each length of pipe furnished without the completedmanufacturers hydrostatic test shall include with the manda-tory marking the letters “NH.”11.4 Nondestructive ExaminationEach pipe shall be ex-amined with a nondestructive test in accordance with PracticeE213 or Practice E426. Unless specifically called out by thepurchaser, the selection of the nondestructi
