ASTM A988 A988M-2011 Standard Specification for Hot Isostatically-Pressed Stainless Steel Flanges Fittings Valves and Parts for High Temperature Service《高温下使用的热等静加压成形的不锈钢法兰盘 管配件 阀及.pdf
《ASTM A988 A988M-2011 Standard Specification for Hot Isostatically-Pressed Stainless Steel Flanges Fittings Valves and Parts for High Temperature Service《高温下使用的热等静加压成形的不锈钢法兰盘 管配件 阀及.pdf》由会员分享,可在线阅读,更多相关《ASTM A988 A988M-2011 Standard Specification for Hot Isostatically-Pressed Stainless Steel Flanges Fittings Valves and Parts for High Temperature Service《高温下使用的热等静加压成形的不锈钢法兰盘 管配件 阀及.pdf(11页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: A988/A988M 11Standard Specification forHot Isostatically-Pressed Stainless Steel Flanges, Fittings,Valves, and Parts for High Temperature Service1This standard is issued under the fixed designation A988/A988M; the number immediately following the designation indicates the yearof origina
2、l 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. Scope*1.1 This specification covers hot isostatically-pressed, pow-der meta
3、llurgy, stainless steel piping components for use inpressure systems. Included are flanges, fittings, valves, andsimilar parts made to specified dimensions or to dimensionalstandards, such as in ASME specification B16.5.1.2 Several grades of martensitic, austenitic, age hardening,and austenitic-ferr
4、itic stainless steels are included in thisspecification.1.3 Supplementary requirements are provided for use whenadditional testing or inspection is desired. These shall applyonly when specified individually by the purchaser in the order.1.4 This specification is expressed in both inch-pound unitsand
5、 in SI units. Unless the order specifies the applicable “M”specification designation (SI units), however, the material shallbe furnished to inch-pound units.1.5 The values stated in either inch-pound units or SI unitsare to be regarded separately as the standard. Within the text,the SI units are sho
6、wn in parentheses. 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 thestandard.1.6 The following safety hazards caveat pertains only to testmethods po
7、rtions 8.1, 8.2, 9.5-9.7, and Section 10 of thisspecification: This standard does not purport to address all ofthe safety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bi
8、lity of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2A262 Practices for Detecting Susceptibility to IntergranularAttack in Austenitic Stainless SteelsA275/A275M Practice for Magnetic Particle Examinationof Steel ForgingsA745/A745M Practice for Ultrasonic Examination
9、 of Aus-tenitic Steel ForgingsA751 Test Methods, Practices, and Terminology for Chemi-cal Analysis of Steel ProductsA923 Test Methods for Detecting Detrimental IntermetallicPhase in Duplex Austenitic/Ferritic Stainless SteelsA961/A961M Specification for Common Requirements forSteel Flanges, Forged F
10、ittings, Valves, and Parts for PipingApplicationsB311 Test Method for Density of Powder Metallurgy (PM)Materials Containing Less Than Two Percent PorosityE112 Test Methods for Determining Average Grain SizeE165 Practice for Liquid Penetrant Examination for GeneralIndustryE340 Test Method for Macroet
11、ching Metals and AlloysE606 Practice for Strain-Controlled Fatigue TestingG48 Test Methods for Pitting and Crevice Corrosion Resis-tance of Stainless Steels and Related Alloys by Use ofFerric Chloride Solution2.2 MSS Standard:SP 25 Standard Marking System for Valves, Fittings,Flanges, and Unions32.3
12、 ASME Specifications and Boiler and Pressure VesselCodes:B16.5 Dimensional Standards for Steel Pipe Flanges andFlanged Fittings42.4 ASME Specification IX Welding Qualifications:SFA-5.4 Specification for Corrosion-Resisting Chromiumand Chromium-Nickel Steel Covered Welding Electrodes4SFA-5.9 Specific
13、ation for Corrosion-Resisting Chromiumand Chromium-Nickel Steel Welding Rods and BareElectrodes41This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.22 onSteel Forgings and Wrought Fittings
14、 for Piping Applications and BoltingMaterials for Piping and Special Purpose Applications.Current edition approved May 1, 2011. Published June 2011. Originallyapproved in 1998. Last previous edition approved in 2007 as A988/A988M 07.DOI: 10.1520/A0988_A0988M-11.2For referenced ASTM standards, visit
15、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.3Available from Manufacturers Standardization Society of the Valve and FittingsIndustry (MSS), 127
16、Park St., NE, Vienna, VA 22180-4602, http:/www.mss-.4Available from American Society of Mechanical Engineers (ASME), ASMEInternational Headquarters, Three Park Ave., New York, NY 10016-5990, http:/www.asme.org.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM Internat
17、ional, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.SFA-5.11 Specification for Nickel and Nickel-Alloy Cov-ered Welding Electrodes43. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 can, nthe container used to encapsulate the powderduring th
18、e pressure consolidation process; it is partially or fullyremoved from the final part.3.1.2 compact, nthe consolidated powder from one can. Itmay be used to make one or more parts.3.1.3 consolidation, nthe bonding of adjacent powderparticles in a compact under pressure by heating to a tempera-ture b
19、elow the melting point of the powder.3.1.4 fill stem, nthe part of the compact used to fill thecan. It is not usually integral to the part produced.3.1.5 hot isostatic-pressing, na process for simultane-ously heating and forming a compact in which the powder iscontained in a sealed formable enclosur
20、e usually made frommetal and the so-contained powder is subjected to equalpressure from all directions at a temperature high enough topermit plastic deformation and consolidation of the powderparticles to take place.3.1.6 lot, na number of parts made from a single powderblend following the same manu
21、facturing practice.3.1.7 part, na single item coming from a compact, eitherprior to or after machining.3.1.8 powder blend, na homogeneous mixture of powderfrom one or more heats of the same grade.3.1.9 rough part, nthe part prior to final machining.4. Ordering Information4.1 It is the responsibility
22、 of the purchaser to specify in thepurchase order all requirements that are necessary for materialordered under this specification. Such requirements may in-clude, but are not limited to, the following:4.1.1 Quantity (weight or number of parts),4.1.2 Name of material or UNS number,4.1.3 ASTM designa
23、tion and year of issue,4.1.4 Dimensions (tolerances and surface finishes should beincluded),4.1.5 Microstructure examination if required (5.1.4),4.1.6 Inspection (15.1),4.1.7 Whether rough part or finished machined part (8.2.2),4.1.8 Supplementary requirements, if any,4.1.9 Additional requirements (
24、See 7.2 and 17.1), and4.1.10 Requirement, if any, that the manufacturer shallsubmit drawings for approval showing the shape of the roughpart before machining and the exact location of test specimenmaterial (See 9.3).TABLE 1 Chemical RequirementsComposition, %AUNSDesignationGrade Carbon Manganese Pho
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