ASTM A758 A758M-2000(2005) Standard Specification for Wrought-Carbon Steel Butt-Welding Piping Fittings with Improved Notch Toughness.pdf
《ASTM A758 A758M-2000(2005) Standard Specification for Wrought-Carbon Steel Butt-Welding Piping Fittings with Improved Notch Toughness.pdf》由会员分享,可在线阅读,更多相关《ASTM A758 A758M-2000(2005) Standard Specification for Wrought-Carbon Steel Butt-Welding Piping Fittings with Improved Notch Toughness.pdf(5页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: A 758/A 758M 00 (Reapproved 2005)Standard Specification forWrought-Carbon Steel Butt-Welding Piping Fittings withImproved Notch Toughness1This standard is issued under the fixed designationA 758/A 758M; the number immediately following the designation indicates the yearof original adopt
2、ion 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. Scope1.1 This specification covers wrought-carbon steel butt-welding seamless or
3、welded fittings specially processed toensure better notch toughness than that to be expected infittings manufactured to the requirements of SpecificationA 234/A 234M.1.1.1 Included are elbows, caps, tees, reducers, and othertype fittings covered by ASME B 16.9.1.1.2 Heat treatment is required for al
4、l fittings.1.1.3 Fittings with mandatory radiographic examination ofwelds are included.1.1.4 Supplementary requirements are provided for usewhen additional testing or examination is desired.1.1.5 Cast fittings, and fittings formed from all weld metal,are not included.1.2 Several type of fittings are
5、 provided, as follows:TypeHeat TreatmentRequiredWeld SeamFinish (5.3.2)RadiographyRequired?30 normalize UW-35 no31 normalize UW-35 yes32 normalize UW-35 and ground flush yes40 normalize and temper UW-35 no41 normalize and temper UW-35 yes42 normalize and temper UW-35 and ground flush yes50 quench an
6、d temper UW-35 no51 quench and temper UW-35 yes52 quench and temper UW-35 and ground flush yes1.3 It shall be the responsibility of the purchaser to deter-mine whether material meeting the requirements of this speci-fication is satisfactory for the service application.1.4 This specification is expre
7、ssed in both inch-pound unitsand SI units. However, unless the order specifies the applicable“M” specification designation (SI units), the material shall befurnished 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
8、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 in nonconformance with the specifi-cation.2. Referenced Documents2.1 In addition to those
9、 reference documents listed inSpecification A 960/A 960M, the following list of standardsapply to this specification:2.2 ASTM Standards:2A 234/A 234M Specification for Piping Fittings of WroughtCarbon Steel and Alloy Steel for Moderate and ElevatedTemperaturesA 275/A 275M Test Method for Magnetic Pa
10、rticle Exami-nation of Steel ForgingsA 370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA 960/A 960M Specification for Common Requirementsfor Wrought Steel Piping FittingsE 165 Test Method for Liquid Penetrant Inspection MethodE 709 Guide for Magnetic Particle Examination2.3 A
11、SME Boiler and Pressure Vessel Code (ASME Code):3Section VIII, Division 1 Pressure VesselsSection IX , Welding and Brazing Qualifications2.4 ASME Standard:B 16.9 Standards for Steel Butt-Welding Fittings32.5 ASNT Standard:SNT-TC-1A Practice for Nondestructive Examination Per-sonnel Qualification and
12、 Certification43. Ordering Information3.1 See Specification A 960/A 960M.4. General Requirements4.1 Product furnished to this specification shall conform tothe requirements of Specification A 960/A 960M, including1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless
13、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.Current edition approved Sept. 10, 2000. Published December 2000. Originallyapproved in 19
14、78. Last previous edition approved in 1998 as A 758/A 758M 98.2For 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 standards Document Summary page onthe ASTM website
15、.3Available from American Society of Mechanical Engineers (ASME), ASMEInternational Headquarters, Three Park Ave., New York, NY 10016-5990.4Available from TheAmerican Society for Nondestructive Testing (ASNT), P.O.Box 28518, 1711 Arlingate Ln., Columbus, OH 43228-0518.1Copyright ASTM International,
16、100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.any supplementary requirements that are indicated in thepurchase order. Failure to comply with the requirements ofSpecification A 960/A 960M constitutes non-conformancewith this specification. In case of a conflict b
17、etween therequirements of this specification and Specification A 960/A 960M, this specification shall prevail.5. Materials and Manufacture5.1 The steel shall be killed and shall be melted to a fineaustenitic grain size practice.5.2 The starting material shall be wrought and in the form ofblooms, bil
18、lets, slabs, forgings, bars, plates, sheets, seamlesspipe or tube, or welded-with-filler-metal pipe or tube. Castproducts shall not be used.5.3 Any forming process, fusion-welding process, or com-bination of such processes, may be used.5.3.1 All welding shall be fusion-welded in accordance withthe r
19、equirements of Section IX of the ASME Boiler andPressure Vessel Code. Welding procedures, welders, and weld-ing operators shall be qualified in accordance with Section IXof the ASME Boiler and Pressure Vessel Code.5.3.2 All welded joints shall be finished in accordance withParagraph UW-35 of Section
20、 VIII, Division 1, of the ASMECode.5.3.3 Welded joints of Type 32, 42, and 52 shall be groundflush.5.3.4 Welded joints of Types 31, 41, 51, 32, 42, and 52 shallbe examined by radiography in accordance with the require-ments of Paragraph UW-51 of Section VIII, Division 1,oftheASME Code, and shall con
21、form to the requirements ofParagraph UW-51.5.4 Heat TreatmentAll fittings shall be heat treated sub-sequent to final welding and forming.5.4.1 Types 30, 31, and 32 fittings shall be normalized byuniformly heating to a temperature in the austenitizing range,but not to exceed 1700 F 925 C, and subsequ
22、ently removedfrom the furnace and air-cooled individually to room tempera-ture.5.4.2 Types 40, 41, and 42 fittings shall be normalized inaccordance with 5.4.1. After normalizing, the fittings shall betempered by heating to a temperature in the range from 1100 Fto 1200 F 595 C to 675 C, soaking at th
23、at temperature for12 h minimum per 1 in. 25 mm of thickness, but not less than15 min, and then air-cooled to room temperature.5.4.3 Types 50, 51, and 52 fittings shall be quenched-and-tempered by uniformly heating to a temperature in the auste-nitizing range, but not to exceed 1700 F 925 C, and then
24、quenching in a liquid media from the austenitizing temperatureto a temperature below 800 F 425 C. After quenching, thefittings shall be reheated to a temperature in the range from1100 F to 1250 F 595 C to 675 C, soaking at thattemperature for12 h minimum per 1 in. 25 mm of thickness,but not less tha
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
最后一页预览完了!喜欢就下载吧,查找使用更方便
10000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ASTMA758A758M20002005STANDARDSPECIFICATIONFORWROUGHTCARBONSTEELBUTTWELDINGPIPINGFITTINGSWITHIMPROVEDNOTCHTOUGHNESSPDF

链接地址:http://www.mydoc123.com/p-459421.html