1、AN AMERICAN NATIONAL STANDARDValvesFlanged, Threaded, and Welding EndASME B16.34-2004(Revision of ASME B16.34-1996)Copyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASME B16.34-2004(Revision of ASME
2、B16.34-1996)Valves Flanged,Threaded, andWelding EndAN AMERICAN NATIONAL STANDARDThree Park Avenue New York, NY 10016Copyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Date of Issuance: September 2, 20
3、05The next edition of this Standard is scheduled for publication in 2007. There will be no addendaissued to this edition.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard. Interpretations are published on the ASME Web site under the Committee Pa
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10、Mechanical EngineersThree Park Avenue, New York, NY 10016-5990Copyright 2005 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.Copyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license fro
11、m IHS-,-,-CONTENTSForeword vCommittee Roster . viiCorrespondence With the B16 Committee viiiIntroduction . ix1 Scope . 12 Pressure-Temperature Ratings . 23 Nominal Pipe Size 44 Marking . 45 Materials 56 Dimensions 67 Pressure Testing 108 Requirements for Special Class Valves . 11Figures1 Method of D
12、esignating Location of Auxiliary Connections When Specified 132 Thread Length for Auxiliary Connections . 143 Socket Welding for Auxiliary Connections 144 Butt Welding for Auxiliary Connections 145 Bosses for Auxiliary Connections . 156 Gate Body (Pressure Seal Bonnet) 157 Y Pattern Globe Body (Pres
13、sure Seal Bonnet) . 168 Angle Body (Pressure Seal Bonnet) Bonnet Same as Y Pattern Globe 169 Elbow Down (Pressure Seal Bonnet) 1710 Gate Body (Flanged Bonnet) . 1711 Globe Body (Flanged Bonnet) 1812 Butterfly Body . 1813 Plug Body . 1914 Conduit Gate Body (Pressure Seal Bonnet) 1915 Dished Cover 201
14、6 Flat Cover . 2017 Butterfly Valve Body . 21Tables1 Material Specification List: Applicable ASTM Specification 222 Pressure-Temperature Ratings 263 Valve Body Minimum Wall Thickness tm, mm (in.) 914 Minimum Wall Thickness for Socket Welding and Threaded Ends . 97Mandatory AppendicesI Radiography Ex
15、amination: Procedure and Acceptance Standards 99II Magnetic Particle Examination: Procedure and Acceptance Standards 101III Liquid Penetrant Examination: Procedure and Acceptance Standards 102IV Ultrasonic Examination: Procedure and Acceptance Standards . 103V Requirements for Limited Class Valves .
16、 104VI Basis Equations for Minimum Wall Thickness . 107VII Pressure-Temperature Ratings: U.S. Customary Units . 109VIII Reference Standards and Specifications . 172iiiCopyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without lic
17、ense from IHS-,-,-Nonmandatory AppendicesA Relationship Between Nominal Pipe Size and Inside Diameter 174B Method Used for Establishing Pressure-Temperature Ratings 176C Quality System Program . 183ivCopyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or
18、 networking permitted without license from IHS-,-,-FOREWORDIn December 1969, American National Standards Committee B16 changed its name from Stan-dardization of Pipe Flanges and Fittings to Standardization of Valves, Fittings, and Gaskets,reflecting American National Standards Institute approval of
19、a broadened scope for the B16Committee. At the same meeting, the committee approved a plan for the organization of asubcommittee to develop a new standard for steel valves with other than flanged ends. Subse-quently, B16 Subcommittee 15 was appointed and held its first meeting in December 1970.Histo
20、rically, in the development of standards and pressure-temperature ratings for steel valves,the various rating classes for flanges provided an obviously logical basis for valve ratings. Steelvalves with flanges of standard dimensions, many also offered in buttwelding-end versions, weregiven the same
21、pressure-temperature ratings as the flanges. In 1949, a new edition of the standard,then designated B16e 1949, was published, in which a table covering wall thickness requirementsfor weld end valves had been added. In 1964, the Manufacturers Standardization Society of theValve and Fittings Industry
22、developed and published Standard Practice SP 66, covering pressure-temperature ratings of steel buttwelding-end valves. SP 66 introduced a new method for establish-ing ratings by making ratings a function of the mechanical strength properties of the body materialat all temperatures. Following the pu
23、blication of SP 66, B16 activated Subcommittee 4 for thepurpose of studying the general subject of pressure-temperature ratings and developing rationalcriteria for such ratings.In the B16 charge to Subcommittee 15, it was established that the new standard would replaceSP 66 and also remove the refer
24、ence to buttwelding-end valves from B16.5. Flanged-end valveswould continue to be covered in B16.5 but on a fully specified basis, rather than as an add-on.As the work of the subcommittee got underway, concurrent action was initiated in Subcommittee3 for revision of B16.5. Subsequent operations of S
25、ubcommittees 3 and 15 were closely coordinatedto provide assurance that the new standard and the revised B16.5 would be compatible.A key and basic issue of mutual concern in this coordination was the matter of pressure-temperature ratings. It was necessary to incorporate the SP 66-type ratings in th
26、e new standard,but at the same time also to provide ratings equivalent to those in B16.5 covering the buttweldingequivalents of flanged-end valves. Subcommittee 4 had made definitive recommendations forrevisions in the flange ratings and it was obviously desirable to rationalize the two types ofrati
27、ngs as they would appear side-by-side in the new standard.The results of these efforts appear herein in the form of pressure-temperature ratings tables.The method of computing the ratings is detailed in Nonmandatory Appendix B. The ratingsdiffer from the pre-1968 B16.5 ratings because they are now c
28、alculated as a function of themechanical properties of the pressure boundary materials, in contrast to the empirical basis usedpreviously. A change in the SP 66-type rating (herein designated Special Class) discontinues theapplication of a plasticity factor at elevated temperatures which, in the opi
29、nion of the committee,could not be justified in dimension-sensitive valves.Other innovations include the coverage of forged or fabricated body valves and an increase indetailed coverage by pressure-temperature ratings from 17 materials in B16.5 to 24 materialgroups in the new standard and in the rev
30、ised B16.5. Dimensional requirements have been refinedand augmented to give the designer more latitude and the user more assurance of adequacy. Anumber of the innovations have had trial use and at least some degree of acceptance, as theyhave been taken from the section on valve requirements develope
31、d and published by the ASMEBoiler and Pressure Vessel Code to cover valves used in nuclear power plants. A section on valvetesting eliminates uncertainties on such points as seat test requirements and stem seal testing.Approval for the 1973 edition of the Standard by the American National Standards
32、Institutewas granted in October 1973.In December 1973, a reorganization of the subcommittee structure for B16 was approved.Subcommittee 15 was redesignated as Subcommittee N and was assigned responsibility for allsteel valves. Work began to include coverage for flanged-end valves in ANSI B16.34. The
33、 1977vCopyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-edition contained flanged-end valve requirements formerly in ANSI B16.5. The rating proceduresof B16.5 were adopted and made applicable to Stan
34、dard Class buttwelding-end valves. Themethod of deriving ratings was revised. Major changes were made in the method for determiningratings for austenitic stainless steel valves and ratings for Class 150 valves for all materials. Thepressure-temperature tables and materials groups were rearranged and
35、 revised using data fromthe reference Sections of the ASME Boiler and Pressure Vessel Code through the Summer 1975Addenda. A number of clarifying and editorial revisions were also made in order to improvethe text. It was also resolved that frequent minor changes in pressure-temperature ratings becau
36、seof revisions to the reference material strength property tables should be avoided and that, as ageneral guide, such changes should not be considered unless resulting ratings would be changedby an amount in excess of 10%.Approval for the 1977 edition of the Standard by the American National Standar
37、ds Institutewas granted on June 16, 1977.During 1979, work began on the 1981 edition. Materials coverage was expanded. Nickel alloysand other alloys were added. Bolting rules were revised to accommodate special alloy boltingfor the new materials. Revisions were included to clarify requirements for r
38、otary motion valves,e.g., ball valves and butterfly valves. Wafer-type valves were specifically identified. Other clarify-ing and editorial revisions were made in order to improve the text.Following approvals by the Standards Committee and Secretariat, approval for the 1981 editionwas granted by the
39、 American National Standards Institute on August 14, 1981.During 1985, revisions were proposed that added requirements for socket welding-end andthreaded-end valves. The inclusion of requirements for these valves increased the scope of theStandard. Also, the listings for nickel alloy and other alloy
40、 valves materials were expanded. Rulesfor threaded body joints were added, and wafer-type valve body rules improved.Following approvals by the Standards Committee and ASME, approval for the 1988 editionwas granted by the American National Standards Institute on February 24, 1988.During 1993 and carr
41、ying over into 1994, revisions offered included multiple material markingand an improved interpolation procedure. New materials were added and the pressure-tempera-ture rating tables were recalculated in accordance with Nonmandatory Appendix B using thelatest data available from the reference ASME B
42、oiler and Pressure Vessel Code sources. Anappendix was added covering nonmandatory requirements for a quality system program.Following the approvals the Standards Committee and ASME, approval for the new editionwas granted by the American National Standards Institute on October 3, 1996.Work was star
43、ted during 1999 to revise the standard to include metric units as the primaryreference units while maintaining U.S. customary units in either parenthetical or separate forms.The goal is to delete the U.S. customary units when the standard is next issued. All pressure-temperature ratings have been re
44、calculated using data from the latest edition of the ASME Boilerand Pressure Vessel Code, Section II, Part D. As a result, some materials have been shifted toother material groups and some changes have been made to some valve ratings within materialgroups. Because of diminished interest for flanged
45、end valves conforming to ASME Class 400,they are not specifically listed in this revision. Flanges for Class 400 will continue to be listed inB16 flange standards. Provision has been made to allow Class 400 valves to be furnished asintermediate rated valves. Numerous requirement clarifications and e
46、ditorial revisions have alsobeen made.Following the approvals of the Standards Committee and ASME, approval for the new editionwas granted by the American National Standards Institute on February 20, 2004.All requests for interpretation or suggestions for revisions should be sent to the Secretary, B
47、16Committee, The American Society of Mechanical Engineers, Three Park Avenue, New York, NY10016-5990.viCopyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASME B16 COMMITTEEStandardization of Valves, F
48、langes, Fittings, and Gaskets(The following is the roster of the Committee at the time of approval of this Standard.)OFFICERSH. R. Sonderegger, ChairM. L. Nayyar, Vice ChairP. A. Reddington, SecretaryCOMMITTEE PERSONNELW. B. Bedesem, ExxonMobil Research and Engineering Co.M. A. Clark, Nibco, Inc.A.
49、Cohen, Arthur Cohen however, theyshould not contain proprietary names or information.Requests that are not in this format will be rewritten in this format by the Committee priorto being answered, which may inadvertently change the intent of the original request.ASME procedures provide for reconsideration of any interpretation when or if additionalinformation that might affect an interpr
