1、Designation:A 707/A 707M 02An American National StardardStandard Specification forForged Carbon and Alloy Steel Flanges for Low-Temperature Service1This standard is issued under the fixed designationA 707/A 707M;the number immediately following the designation indicates the yearof original adoption
2、or,in the case of revision,the year of last 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.1.Scope*1.1 This specification covers forged carbon and alloy steelflanges intended primarily
3、 for petroleum and gas pipelines inareas subject to low ambient temperatures.Included are flangesto specified dimensions or to dimensional standards such asthose MSS,ASME,and API specifications that are referencedin Section 2.1.2 Supplementary requirements are provided for use whenadditional require
4、ments are desired.These shall apply onlywhen specified individually by the purchaser in the order.1.3 Eight grades,four yield-strength classes,and threedifferent notch toughness levels are included.1.4 The availability of a particular size of flange of aspecific grade and class is limited only by th
5、e capability of thecomposition to meet the specified mechanical property require-ments.However,current practice normally limits the follow-ing:(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 Classes 1 an
6、d 2,and(f)Grades L5,L6,and L8 are generally available in anyclass.1.5 This specification is expressed in both inch-pound unitsand in SI units.However,unless the order specifies theapplicable“M”specification designation(SI units),the mate-rial shall be furnished to inch-pound units.1.6 The values sta
7、ted 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 mustbe used independently of the other.Combining values from thetwo systems may result
8、 in nonconformance with the specifi-cation.2.Referenced Documents2.1 In addition to those reference documents listed inSpecification A 961,the following list of standards apply tothis specification:2.2 ASTM Standards:A 388/A 388MPractice for Ultrasonic Examination ofHeavy Steel Forgings2A 788 Specif
9、ication for Steel Forgings,General Require-ments2A 961 Specification for Common Requirements for SteelFlanges,Forged Fittings,Valves,and Parts for PipingApplications32.3MSS Standards:SP 44 Steel Pipeline Flanges42.4API Standard:605 Large Diameter Carbon Steel Flanges52.5ASME Boiler and Pressure Vess
10、el Code:Section IXWelding Qualifications6Section VIII Division I,Part UG-8462.6ASME Standard:B 16.5 Dimensional Standards for Steel Pipe Flanges andFlanged Fittings62.7AWS Standards:A 5.1 Mild Steel Covered Electrodes7A 5.5 Low-Alloy Steel Covered Arc-Welding Electrodes73.Terminology3.1 Definitions:
11、3.1.1 flakesshort discontinuous internal fissures attributedto stresses produced by localized transformation and decreasedsolubility of hydrogen during cooling after hot working.3.1.2 linear surface imperfection(or indication)an imper-fection or indication with a length at least three times its widt
12、h.1This 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 Applications and BoltingMaterials for Piping and Special Purpose Applications.Cur
13、rent edition approved Sept.10,2002.Published November 2002.Originallypublished as A 707 74.Last previous edition A 707/A 707M 00a.2Annual Book of ASTM Standards,Vol 01.05.3Annual Book of ASTM Standards,Vol 01.01.4Available from Manufacturers Standardization Society of the Valve and FittingsIndustry(
14、MSS),127 Park St.,NE,Vienna,VA 22180-4602.5Available from The American Petroleum Institute(API),1220 L.St.,NW,Washington,DC 20005.6Available from American Society of Mechanical Engineers(ASME),ASMEInternational Headquarters,Three Park Ave.,New York,NY 10016-5990.7Available from The American Welding
15、Society(AWS),550 NW LeJeune Rd.,Miami,FL 33126.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.4.Ordering Information4.1 It is the purchasers responsibility to specify in t
16、hepurchase order all ordering information necessary to purchasethe needed material.In addition to the ordering informationguide lines in Specification A 961,orders should include thefollowing information:4.1.1 Additional requirements(see Table 1 footnotes,9.2.2,9.3,11.5,17.1,21.1,and 21.2).5.General Requirements5.1 Product furnished to this specification shall conform tothe requirements of Specification A 961,including any supple-mentary requirements that are indicated in the purchase order.Fail
