1、Designation: A524 17Standard Specification forSeamless Carbon Steel Pipe for Atmospheric and LowerTemperatures1This standard is issued under the fixed designation A524; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of la
2、st revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification2covers seamless carbon steel pipeintended primarily for service at atmospheric and lowertemperatures
3、, NPS18 to 26 inclusive, with nominal (average)wall thickness as given in ANSI B36.10. Pipe having otherdimensions may be furnished, provided such pipe complieswith all other requirements of this specification. Pipe orderedto this specification shall be suitable both for welding, and forbending, fla
4、nging, and similar forming operations.1.2 The product is available in two grades (Tables 1 and 2).1.3 Product may be either of hot finished or cold drawnmanufacture (see 5.1.4 and 5.1.5).1.4 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are math
5、ematicalconversions to SI units that are provided for information onlyand are not considered standard.NOTE 1The dimensionless designator NPS (nominal pipe size) hasbeen substituted in this standard for such traditional terms as “nominaldiameter,” “size,” and “nominal size.”1.5 The following hazard c
6、aveat applies to the test methodsportion, Section 16, only. This standard does not purport toaddress all of the safety concerns, if any, associated with itsuse. It is the responsibility of the user of this standard toestablish appropriate safety, health, and environmental prac-tices and determine th
7、e applicability of regulatory limitationsprior to use.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issue
8、d by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:3A530/A530M Specification for General Requirements forSpecialized Carbon and Alloy Steel PipeE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Spec
9、ifications2.2 American National Standards Institute Standard:B36.10 Welded and Seamless Wrought Steel Pipe43. Ordering Information3.1 Orders for material under this specification shouldinclude the following, as required, to describe the desiredmaterial adequately:3.1.1 Quantity (feet or number of le
10、ngths),3.1.2 Name of material (seamless carbon steel pipe),3.1.3 Grade (Table 1 and Table 2),3.1.4 Manufacture (hot finished or cold drawn (see 5.1.4 and5.1.5),3.1.5 Size (either nominal wall thickness and weight class orschedule number, or both, or outside diameter and nominalwall thickness, ANSI B
11、36.10),3.1.6 Length (Section 17),3.1.7 Optional requirements (Section 8 and Section 11 ofSpecification A530/A530M),3.1.8 Test report required (Certification Section of Specifi-cation A530/A530M),3.1.9 Specification designation,3.1.10 Hydrostatic test (see 11.2).3.1.11 End use of material, and3.1.12
12、Special requirements.4. General Requirements4.1 Material furnished to this specification shall conform tothe applicable requirements of the current edition of Specifi-cation A530/A530M unless otherwise provided herein.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stain
13、less Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.09 on Carbon Steel Tubular Products.Current edition approved Nov. 1, 2017. Published November 2017. Originallyapproved in 1965. Last previous edition approved in 2012 as A524 96 (2012).DOI: 10.1520/A0524-17.2For ASME B
14、oiler and Pressure Vessel Code Applications see related Specifi-cation SA-524 in Section II of that Code.3For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standar
15、ds Document Summary page onthe ASTM website.4Available from American National Standards Institute, 11 West 42nd St., 13thFloor, New York, NY 10036.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA
16、19428-2959. United StatesThis 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 Te
17、chnical Barriers to Trade (TBT) Committee.15. Materials and Manufacture5.1 Process:5.1.1 The steel shall be killed steel made by one or more ofthe following processes: open-hearth, electric-furnace, orbasic-oxygen.5.1.2 The steel shall be made to fine grain practice.5.1.3 Steel may be cast in ingots
18、 or may be strand cast.When steel of different grades are sequentially strand cast,identification of the resultant transition material is required.The producer shall remove the transition material by anyestablished procedure that positively separates the grades.5.1.4 Pipe NPS 112 and under may be ei
19、ther hot finished orcold drawn.5.1.5 Unless otherwise specified, pipe NPS 2 and over shallbe furnished hot finished. When agreed upon between themanufacturer and purchaser, cold-drawn pipe may be fur-nished.5.2 Heat TreatmentAll hot-finished and cold-drawn pipeshall be reheated to a temperature abov
20、e 1550 F (845C) andfollowed by cooling in air or in the cooling chamber of acontrolled atmosphere furnace.6. Chemical Composition6.1 The steel shall conform to the chemical requirementsprescribed in Table 1.7. Heat Analysis7.1 An analysis of each heat of steel shall be made by thesteel manufacturer
21、to determine the percentages of the ele-ments specified in Section 6. The chemical composition thusdetermined, or that determined from a product analysis madeby the manufacturer, if the latter has not manufactured thesteel, shall be reported to the purchaser or the purchasersrepresentative, and shal
22、l conform to the requirements specifiedin Section 6.8. Product Analysis8.1 At the request of the purchaser, analyses of two pipesfrom each lot (Note 2) shall be made by the manufacturer fromthe finished pipe. The chemical composition thus determinedshall conform to the requirements specified in Sect
23、ion 6.NOTE 2Alot shall consist of 400 lengths, or fraction thereof, for eachsize NPS 2 up to but not including NPS 6, and of 200 lengths, or fractionthereof, for each size NPS 6 and over.8.2 If the analysis of one of the tests specified in 8.1 doesnot conform to the requirements specified in Section
24、 6,analyses shall be made on additional pipe of double the originalnumber from the same lot, each of which shall conform torequirements specified.9. Physical Properties9.1 Tensile PropertiesThe material shall conform to therequirements as to tensile properties prescribed in Table 2.9.2 Bending Prope
25、rties:9.2.1 For pipe NPS 2 and under, a sufficient length of pipeshall stand being bent cold through 90 around a cylindricalmandrel, the diameter of which is twelve times the nominaldiameter of the pipe, without developing cracks. When orderedfor close coiling, the pipe shall stand being bent cold t
26、hrough180 around a cylindrical mandrel, the diameter of which iseight times the nominal diameter of the pipe, without failure.9.2.2 For pipe whose diameter exceeds 25 in. (635 mm) andwhose diameter to wall thickness ratio is 7.0 or less, bend testspecimens shall be bent at room temperature through 1
27、80without cracking on the outside of the bent portion. The insidediameter of the bend shall be 1 in. (25.4 mm). This test shall bein place of Section 10.NOTE 3Diameter to wall thickness ratio = specified outside diameter/nominal wall thickness.Example: For 28 in. diameter 5.000 in. thick pipe the di
28、ameter to wallthickness ratio = 28/5 = 5.6.10. Flattening Test Requirements10.1 For pipe over NPS 2, a section of pipe not less than 212in. (63.5 mm) in length shall be flattened cold between parallelplates until the opposite walls of the pipe meet. Flattening testsshall be in accordance with Specif
29、ication A530/A530M, exceptthat in the equation used to calculate the H value, the followinge constants shall be used:0.07 for Grade I0.08 for Grade II10.2 When low D-to-t ratio tubulars are tested, because thestrain imposed due to geometry is unreasonably high on theinside surface at the 6 and 12 oc
30、lock locations, cracks at theselocations shall not be cause for rejection if the D-to-t ratio isless than ten.11. Hydrostatic Test Requirements11.1 Each length of pipe shall be subjected to the hydro-static pressure, except as provided in 11.2.11.2 When specified in the order, pipe may be furnishedw
31、ithout hydrostatic testing and each length so furnished shallinclude with the mandatory marking the letters “NH.”11.3 When certification is required by the purchaser and thehydrostatic test has been omitted, the certification shall clearlystate “Not Hydrostatically Tested,” and the specification num
32、-ber and grade designation, as shown on the certification, shallbe followed by the letters “NH.”12. Dimensions and Weights12.1 The dimensions and weights of plain-end pipe areincluded in ANSI B36.10. Sizes and wall thicknesses mostgenerally available are listed in Appendix X1.13. Dimensions, Weight,
33、 and Permissible Variations13.1 WeightThe weight of any length of pipe shall notvary more than 6.5 % over and 3.5 % under that specified forTABLE 1 Chemical RequirementsElement Grades I and II, Composition, %Carbon, max 0.21Manganese 0.901.35Phosphorus, max 0.035Sulfur, max 0.035Silicon 0.100.40A524
34、 172pipe of Schedule 120 and lighter nor more than 10 % over and3.5 % under that specified for pipe heavier than Schedule 120.Unless otherwise agreed upon between the manufacturer andpurchaser, pipe in sizes NPS 4 and smaller may be weighed inconvenient lots; pipe in sizes larger than NPS 4 shall be
35、weighed separately.13.2 DiameterVariations in outside diameter shall notexceed those specified in Table 3.13.3 ThicknessThe minimum wall thickness at any pointshall not be more than 12.5 % under the nominal wall thicknessspecified.NOTE 4The minimum wall thickness on inspection is shown inAppendix X1
36、.14. Workmanship, Finish, and Appearance14.1 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 necessa
37、ry to assure compliance with 14.2.14.2 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:14.2.1 The defect may be removed by g
38、rinding providedthat the remaining wall thickness is within specified limits.14.2.2 Repaired in accordance with the repair weldingprovisions of 14.6.14.2.3 The section of pipe containing the defect may be cutoff within the limits of requirements on length.14.2.4 Rejected.14.3 To provide a workmanlik
39、e finish and basis for evalu-ating conformance with 14.2, the pipe manufacturer shallremove by grinding the following noninjurious imperfections:14.3.1 Mechanical marks, abrasions (Note 5), and pits, anyof which imperfections are deeper than116 in. (1.58 mm).TABLE 2 Tensile RequirementsWall Thicknes
40、sesGrade I, 0.375 in. (9.52 mm)and underGrade II, greater than 0.375 in.(9.52 mm)Tensile strength, psi (MPa) 60 00085 000(414586)55 00080 000(380550)Yield strength, min, psi (MPa) 35 000 (240) 30 000 (205)Longitudinal Transverse Longitudinal TransverseElongation in 2 in. or 50 mm, min %:Basic minimu
41、m elongation for walls516 in. (7.9 mm) and over in thickness, striptests, and for all small sizes tested in full section30 16.5 35 25When standard round 2 in. or 50 mm gauge length test specimen is used for striptests, a deduction for each132 in. (0.8 mm) decrease in wall thickness below516 in. (7.9
42、 mm) from the basic minimum elongation of the followingpercentage221.50A121.00A28.20.AThe following table gives the computed minimum values:Wall Thickness Elongation in 2 in. or 50 mm, min, %Grade Iin. mm Longitudinal Transverse516 (0.312) 7.94 30.0 16.5932 (0.281) 7.14 28.5 15.514 (0.250) 6.35 27.0
43、 14.5732 (0.219) 5.56 25.5 . . .316 (0.188) 4.76 24.0 . . .532 (0.156) 3.97 22.5 . . .18 (0.125) 3.18 21.0 . . .332 (0.094) 2.38 19.5 . . .116 (0.062) 1.59 18.0 . . .NoteThe above table gives the computed minimum elongation values for each132-in. (0.79-mm) decrease in wall thickness. Where the wall
44、thickness lies betweentwo values shown above, the minimum elongation value is determined by the following equation:Grade Direction of Test EquationI transverse E = 32t + 6.50I longitudinal E = 48t + 15.00where:E = elongation in 2 in. or 50 mm in % andt = actual thickness of specimen, in. (mm).TABLE
45、3 Variations in Outside DiameterNPSDesignatorPermissible Variations in Outside Diameter, in. (mm)Over Under18 to 112, incl164 (0.4)132 (0.8)Over 112 to 4, incl132 (0.8)132 (0.8)Over 4 to 8, incl116 (1.6)132 (0.8)Over 8 to 18, incl332 (2.4)132 (0.8)Over 1818 (3.2)132 (0.8)A524 173NOTE 5Marks and abra
46、sions are defined as cable marks, dinges, guidemarks, roll marks, ball scratches, scores, die marks, and the like.14.3.2 Visual imperfections, commonly referred to as scabs,seams, laps, tears, or slivers, found by exploration in accor-dance with 14.1 to be deeper than 5 % of the nominal wallthicknes
47、s.14.4 At the purchasers discretion, pipe shall be subject torejection if surface imperfections acceptable under 14.2 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 an
48、d thepurchaser.14.5 When imperfections or defects are removed bygrinding, a smooth curved surface shall be maintained, and thewall thickness shall not be decreased below that permitted bythis specification. The outside diameter at the point of grindingmay be reduced by the amount so removed.14.5.1 W
49、all thickness measurements shall be made with amechanical caliper or with a properly calibrated nondestruc-tive testing device of appropriate accuracy. In case of dispute,the measurement determined by use of the mechanical calipershall govern.14.6 Weld repair shall be permitted only subject to theapproval of the purchaser and in accordance with SpecificationA530/A530M.14.7 The finished pipe shall be reasonably straight.15. Number of Tests and Retests15.1 One of either of the tests specified in 9.1 shall be madeon one length
