1、Designation: A707/A707M 10A707/A707M 13Standard Specification forForged Carbon and Alloy Steel Flanges for Low-Temperature Service1This standard is issued under the fixed designation A707/A707M; the number immediately following the designation indicates the yearof original adoption or, in the case o
2、f 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 forged carbon and alloy steel flanges intended primarily for petrol
3、eum and gas pipelines in areassubject to low ambient temperatures. Included are flanges to specified dimensions or to dimensional standards such as those MSS,ASME, and API specifications that are referenced in Section 2.1.2 Supplementary requirements are provided for use when additional requirements
4、 are desired. These shall apply only whenspecified individually by the purchaser in the order.1.3 Eight grades, four yield-strength classes, and three different notch toughness levels are included.1.4 The availability of a particular size of flange of a specific grade and class is limited only by th
5、e capability of the compositionto meet the specified mechanical property requirements. However, current practice normally limits the following:(a) Grade L1 to Classes 1 and 2,(b) Grade L2 to Classes 1, 2, and 3,(c) Grade L3 to Classes 1, 2, and 3,(d) Grade L4 to Classes 1, 2, and 3,(e) Grade L7 to C
6、lasses 1 and 2, and(f) Grades L5, L6, and L8 are generally available in any class.1.5 This specification is expressed in both inch-pound units and in SI units. However, unless the order specifies the applicable“M” specification designation (SI units), the material shall be furnished to inch-pound un
7、its.1.6 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI unitsare shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be usedindependently of the other. Combining values
8、from the two systems may result in nonconformance with the specification.2. Referenced Documents2.1 In addition to those reference documents listed in Specification A961/A961M, the following list of standards apply to thisspecification:2.2 ASTM Standards:2A388/A388M Practice for Ultrasonic Examinati
9、on of Steel ForgingsA788/A788M Specification for Steel Forgings, General RequirementsA961/A961M Specification for Common Requirements for Steel Flanges, Forged Fittings, Valves, and Parts for PipingApplications2.3 MSS Standards:SP 44 Steel Pipeline Flanges31 This specification is under the jurisdict
10、ion ofASTM Committee A01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee A01.22on Steel Forgings and Wrought Fittings for Piping Applications and Bolting Materials for Piping and Special Purpose Applications.Current edition approved Nov. 1, 2010Oct. 1, 20
11、13. Published December 2010October 2013. Originally approved in 1974. Last previous edition approved in 20072010as A707/A707M02(2007).A707/A707M10. DOI: 10.1520/A0707_A0707M-10.10.1520/A0707_A0707M-13.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Servic
12、e at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 Available from Manufacturers Standardization Society of the Valve and Fittings Industry (MSS), 127 Park St., NE, Vienna, VA 22180-4602, http:/www.mss-.This do
13、cument is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions a
14、s appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. Unit
15、ed States12.4 API Standard:605 Large Diameter Carbon Steel Flanges42.5 ASME Boiler and Pressure Vessel Code:Section VIII Division I, Part UG-845Section IX Welding Qualifications52.6 ASME Standard:B 16.5 Dimensional Standards for Steel Pipe Flanges and Flanged Fittings52.7 AWS Standards:A 5.5 Low-All
16、oy Steel Covered Arc-Welding Electrodes63. Terminology3.1 Definitions:3.1.1 flakesshort discontinuous internal fissures attributed to stresses produced by localized transformation and decreasedsolubility of hydrogen during cooling after hot working.3.1.2 linear surface imperfection (or indication)an
17、 imperfection or indication with a length at least three times its width.4. Ordering Information4.1 It is the purchasers responsibility to specify in the purchase order all ordering information necessary to purchase the neededmaterial. In addition to the ordering information guide lines in Specifica
18、tion A961/A961M, orders should include the followinginformation:4.1.1 Additional requirements (see Table 1 footnotes, 9.2.2, 9.3, 11.5, 17.1, 21.1, and and 21.221.1).5. General Requirements5.1 Product furnished to this specification shall conform to the requirements of Specification A961/A961M, incl
19、uding anysupplementary requirements that are indicated in the purchase order. Failure to comply with the general requirements ofSpecification A961/A961M constitutes nonconformance with this specification. In case of conflict between the requirements of thisspecification and Specification A961/A961M,
20、 this specification shall prevail.6. Manufacture6.1 The steel shall meet the melting practice of Specification A961/A961M.6.2 The finished product shall be a forging as defined by 3 (only) of Specification A788/A788M.7. Heat Treatment7.1 After forging and before reheating for heat treatment, the for
21、ging shall be allowed to cool substantially below thetransformation range. The method of cooling shall be such as to ensure against the development of cracks, flakes, etc.7.2 All material shall be heat treated by annealing, normalizing, precipitation hardening, quenching-and-tempering,normalizing-an
22、d-tempering, normalizing-and-precipitation hardening, or quenching-and-precipitation hardening.7.2.1 The procedures for the various heat treatments are as given in Specification A961/A961M except as defined in thefollowing:7.2.1.1 Precipitation HardeningConsists of heating to a temperature between 1
23、000 and 1250F 538 and 677C, holding attemperature for not less than 12 h, and then cooling at any convenient rate.8. Chemical Composition8.1 A chemical heat analysis in accordance with Specification A961/A961M shall be made and conform to the requirements asto chemical composition prescribed in Tabl
24、e 1. Leaded steels shall not be permitted.9. Mechanical Requirements9.1 The material in the weld neck shall conform to the mechanical property requirements prescribed in Table 2.9.2 For the purpose of determining conformance with Table 2, mechanical testing requirements shall confromconform toSpecif
25、ication A961/A961M.4 Available from American Petroleum Institute (API), 1220 L. St., NW, Washington, DC 20005-4070, http:/api-ec.api.org.5 Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Three Park Ave., New York, NY 10016-5990, http:/www.asme.org.6 A
26、vailable from American Welding Society (AWS), 550 NW LeJeune Rd., Miami, FL 33126, http:/www.aws.org.A707/A707M 1329.2.1 For flanges smaller than 24 in. 610 mm in size, the forged test blanks shall be at least 2 in. 50 mm wide by 2 in. 50mm thick by 12 in. 300 mm in length. The test specimens shall
27、be taken with their longitudinal axes parallel to the length ofthe test blank.TABLE 1 Chemical RequirementsCOLSPEC/colnum=“1“Element GradeL1A L2A L3 L4 L5 L6 L7B L8Carbon, max, %Heat analysis 0.20 0.30 0.22 0.18 0.07 0.07 0.20 0.20Product analysis 0.23 0.33 0.25 0.20 0.09 0.09 0.22 0.22Manganese, %H
28、eat analysisProduct analysis0.60-1.500.55-1.600.60-1.350.55-1.451.151.501.051.600.450.650.400.700.400.700.350.751.852.201.752.300.90 max1.00 max0.200.400.150.45Phosphorus, max, %Heat analysisProduct analysis0.0300.0350.0300.0350.0250.0300.0250.0300.0250.0300.0250.0300.0250.0300.0200.025Sulfur, max,
29、%Heat analysisProduct analysis0.0300.0400.0300.0400.0250.0350.0250.0350.0250.0350.0250.0350.0250.0350.0200.025Silicon, max, %Heat analysisProduct analysis0.350.370.350.370.300.320.350.370.350.370.150.170.350.370.350.37Chromium, %Heat analysisProduct analysis0.30 max0.34 max0.30 max0.34 max0.30 max0.
30、34 max0.30 max0.34 max0.600.900.560.940.30 max0.34 max0.30 max0.34 max1.502.001.442.06Nickel, %Heat analysisProduct analysis0.40 max0.43 max0.40 max0.43 max0.40 max0.43 max1.652.001.602.050.701.000.671.030.40 max0.43 max3.23.73.183.822.83.92.683.97Molybdenum, %Heat analysisProduct analysis0.12 max0.
31、13 max0.12 max0.13 max0.12 max0.13 max0.200.300.190.330.150.250.140.280.250.350.220.380.12 max0.13 max0.400.600.350.65Vanadium, %Heat analysisProduct analysis0.05 max0.06 max0.05 max0.06 max0.040.110.030.130.05 max0.06 max0.05 max0.06 max0.05 max0.06 max0.05 max0.06 max0.05 max0.06 maxNitrogen, %Hea
32、t analysisProduct analysis.0.0100.0300.0050.035.Copper, %Heat analysisProduct analysis0.40 max0.43 max0.40 max0.43 max0.20 minC0.18 minC0.40 max0.43 max1.001.300.951.350.40 max0.43 max0.40 max0.43 max0.40 max0.43 maxColumbium, %Heat analysisProduct analysis0.02 max0.03 max0.02 max0.03 max0.02 max0.0
33、3 max0.02 max0.03 max0.03 min0.02 min0.060.100.050.110.02 max0.03 max0.02 max0.03 maxA The sum of copper, nickel, chromium, and molybdenum shall not exceed 1.00 % on heat analysis.B The sum of chromium, molybdenum and vanadium shall not exceed 0.32 % on heat analysis.C When specified.TABLE 2 Mechani
34、cal RequirementsCOLSPEC/colnum=“1“Property Class 1 Class 2Class 3Class 4Yield strengthA min, ksi MPa 42 290 523606041575515Tensile strength, min, ksi MPa 60 415 664557551590620Elongation in 2 in. or 50 mm,min, %22 22 20 20Reduction of area, min, % 40 40 40 40Hardness, HBW 149207 149217156235179265Cv
35、 energy absorption,B,C min, avg,ftlbf J30 41 40 54 50 68 50 68Cv energy absorption,B,D min,ftlbf J24 33 32 43 40 54 40 54A 0.2 % offset.B For a set of three full-size 10 by 10 mm Charpy V-notch specimens.Acceptancevalues for sub-size specimens are reduced in proportion to the reduction in widthof th
36、e specimen.C These requirements are intended to minimize fracture initiation. They are notintended to give assurance against fracture propagation. If minimization of fracturepropagation is of interest, consideration should be given to specifying Supplemen-tary Requirement S7 at the operating tempera
37、ture.D Minimum impact energy permitted for one specimen only of a set of threespecimens.A707/A707M 1339.2.2 For flanges 24 in. 610 mm and larger in size, the test blank dimensions and orientation of test specimens with respectto the test blank shall be subject to agreement.9.3 Specimens shall be obt
38、ained from the midwall of the thinnest section of the hub of the flange or 34 in. 19 mm from thesurface of the test blank. The orientation of specimens taken from a flange shall be subject to agreement.10. Hardness Requirements10.1 A sufficient number of hardness measurements shall be made to ensure
39、 that the hardness values are within the rangesprescribed in Table 2. The number of flanges to be tested shall be as agreed upon between the manufacturer and the purchaser. Thepurchaser may verify that the requirement has been met by testing at any location on the flange, provided such testing does
40、notrender the flange useless.11. Impact Requirements11.1 The material in the weld neck shall conform to the requirements as to impact properties prescribed in Table 2 if the weldneck section is 14 in. 6 mm or greater in thickness.11.2 For the purpose of determining conformance with Table 2, specimen
41、s shall be obtained from production flanges after heattreatment or from separately forged test blanks prepared from the stock used to make the forgings. Such test blanks shall conformto the requirements of Specification A961/A961M.11.3 Specimens shall be obtained from a location on the flange or tes
42、t blank that represents the midwall of the weld neck if thethickness of the weld neck is 2 in. 50 mm or less. If the thickness is greater than 2 in. 50 mm, the specimen location shall bemidway between a surface and the center of thickness. Specimens taken from a flange shall be oriented longitudinal
43、ly with respectto the bore of the flange.11.4 One test (three specimens) shall be made from each heat in each heat treatment charge.11.5 Unless otherwise specified, the test temperature shall be as specified in Table 3.12. Product Analysis12.1 The purchaser may make a product analysis on flanges sup
44、plied to this specification in accordance with Specificaiton-Specification A961/A961M.13. Ultrasonic Examination13.1 Each flange weld neck 24 in. 610 mm and larger in diameter shall be ultrasonically examined over 100 % of the areawithin 2 in. 50 mm of the welding end.13.2 Longitudinal wave examinat
45、ion using a 214 MHz transducer 1 to 118 in. 25 to 29 mm in diameter or 1 in. square 25 mmsquare shall be used. Examination shall be in accordance with the general requirements of Practice A388/A388M.13.3 Any area giving an indication equal to or larger than the signal received from a 14-in. 6-mm fla
46、t-bottonflat-bottom holeshall be cause for rejection. Multiple indications with an amplitude exceeding 50 % of the indication from the calibration hole,accompanied by a loss of back reflection exceeding 50 %, shall also be cause for rejection.Any indication that results in a completeloss of back ref
47、lection shall be cause for rejection.14. Tension Tests14.1 Tensile requirements shall comply with Specification A961/A961M where one tension test shall be made from each heatin each heat treating charge.TABLE 3 Impact Test TemperaturesACOLSPEC/colnum=“1“Grade Test Temperature (Unless OtherwiseSpecif
48、ied), F CL1 20 29L2 50 46L3 50 46L4 80 62L5 80 62L6 80 62L7 100 73L8 100 73A These temperatures are the lowest test temperatures that are commonlyacceptable by the producer. If the minimum design temperature is higher,specifying the higher temperature as the test temperature will generally result in
49、increased availability of a specific grade in greater thicknesses.A707/A707M 13414.1.1 When the heat treating temperatures are the same and the furnaces (either batch or continuous type) are controlled within625F 614C and equipped with recording pyrometers so that complete records of heat treatment are available, then one tensiontest from each heat is required instead of one test from each
