1、Valves Flanged, Threaded, and Welding EndAN AMERICAN NATIONAL STANDARDASME B16.34-2013(Revision of ASME B16.34-2009)ASME B16.34-2013(Revision of ASME B16.34-2009)Valves Flanged,Threaded, andWelding EndAN AMERICAN NATIONAL STANDARDTwo Park Avenue New York, NY 10016 USADate of Issuance: March 29, 2013
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11、erican Society of Mechanical EngineersTwo Park Avenue, New York, NY 10016-5990Copyright 2013 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword vCommittee Roster . viiiCorrespondence With the B16 Committee ixIntroduction . xSummary of Changes xi1 Scope
12、 12 PressureTemperature Ratings . 23 Nominal Pipe Size. 44 Marking 45 Materials . 56 Dimensions . 67 Pressure Testing 108 Requirements for Special Class Valves 11Figures1 Method of Designating Location of Auxiliary Connections When Specified 142 Butterfly Valve Body . 153 Thread Length for Auxiliary
13、 Connections . 164 Bosses for Auxiliary Connections . 165 Socket Welding for Auxiliary Connections 166 Butt Welding for Auxiliary Connections 177 Gate Body (Pressure Seal Bonnet) 178 Y Pattern Globe Body (Pressure Seal Bonnet) . 189 Angle Body (Pressure Seal Bonnet): Bonnet Same as Y Pattern Globe 1
14、810 Elbow Down (Pressure Seal Bonnet) 1911 Gate Body (Flanged Bonnet) . 1912 Globe Body (Flanged Bonnet) 2013 Butterfly Body . 2014 Plug Body . 2115 Conduit Gate Body (Pressure Seal Bonnet) 2116 Dished Cover 2217 Flat Cover . 22Tables1 Material Specification List: Applicable ASTM Specification 232 P
15、ressureTemperature Ratings 283A Valve Body Minimum Wall Thickness, tm,mm 953B Valve Body Minimum Wall Thickness, tm,in. . 984 Minimum Wall Thickness for Socket Welding and Threaded Ends . 101Mandatory AppendicesI Radiography Examination: Procedure and Acceptance Standards 103II Magnetic Particle Exa
16、mination: Procedure and Acceptance Standards 105III Liquid Penetrant Examination: Procedure and Acceptance Standards 106IV Ultrasonic Examination: Procedure and Acceptance Standards . 107V Requirements for Limited Class Valves . 108VI Basis Equations for Minimum Wall Thickness . 111iiiVII PressureTe
17、mperature Ratings: U.S. Customary Units . 113VIII References . 179Nonmandatory AppendicesA Relationship Between Nominal Pipe Size and Inside Diameter 182B Method Used for Establishing PressureTemperature Ratings 184C Quality System Program . 191ivFOREWORDIn December 1969, American National Standards
18、 Committee B16 changed its name fromStandardization of Pipe Flanges and Fittings to Standardization of Valves, Fittings, and Gaskets,reflecting American National Standards Institute (ANSI) approval of a broadened scope for theB16 Committee. At the same meeting, the committee approved a plan for the
19、organization of asubcommittee to develop a new standard for steel valves with other than flanged ends.Subsequently, B16 Subcommittee 15 was appointed and held its first meeting in December 1970.Historically, in the development of standards and pressuretemperature ratings for steel valves,the various
20、 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 pressuretemperature ratings as the flanges. In 1949, a new edition of the Standard,then designated B16
21、e-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 developed and published Standard Practice SP 66, covering pressuretemperature ratings of steel buttweld
22、ing-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 publication of SP 66, B16 activated Subcommittee 4 for thepurpose of studying the general subject of press
23、uretemperature 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 reference to buttwelding-end valves from B16.5. Flanged-end valveswould continue to be covered in B16.5 but on
24、 a fully specified basis, rather than as an add-on.Asthe workof thesubcommittee gotunderway, concurrentaction wasinitiated inSubcommittee3 for revision of B16.5. Subsequent operations of Subcommittees 3 and 15 were closely coordinatedto provide assurance that the new Standard and the revised B16.5 w
25、ould be compatible.A key and basic issue of mutual concern in this coordination was the matter of pressuretemperature ratings. It was necessary to incorporate the SP 66-type ratings in the new Standard,but at the same time also to provide ratings equivalent to those in B16.5 covering the buttwelding
26、equivalents 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 ofratings as they would appear side-by-side in the new Standard.The results of these efforts appear herein in the form
27、of pressuretemperature 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 calculated as a function of themechanical properties of the pressure boundary materials, in contrast to the empiric
28、al 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 opinion of the committee,could not be justified in dimension-sensitive valves.Other innovations include the coverage
29、of forged or fabricated body valves and an increase indetailed coverage by pressuretemperature ratings from 17 materials in B16.5 to 24 materialgroups in the new Standard and in the revised B16.5. Dimensional requirements have been refinedand augmented to give the designer more latitude and the user
30、 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 developed and published by theASME Boiler and Pressure Vessel Code to cover valves used in nuclear power plants. A sectiono
31、n valve testing eliminates uncertainties on such points as seat test requirements and stem sealtesting.Approval for the 1973 edition of the Standard by ANSI was granted in October 1973.In December 1973, a reorganization of the subcommittee structure for B16 was approved.Subcommittee 15 was redesigna
32、ted as Subcommittee N and was assigned responsibility for allsteel valves. Work began to include coverage for flanged-end valves in ANSI B16.34. The 1977vedition contained flanged-end valve requirements formerly in ANSI B16.5. The rating proceduresof B16.5 were adopted and made applicable to Standar
33、d 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. Thepressuretemperature tables and materials groups were rearranged and rev
34、ised 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 pressuretemperature ratings becauseof
35、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 ANSI was granted on June 16, 1977.
36、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 rotary motion valves,e.g., ball valves and
37、 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 ANSI on August 14, 1981.During 1985, revisio
38、ns 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 valves materials were expanded. Rulesfor threaded body joints were added, and
39、 wafer-type valve body rules improved.Following approvals by the Standards Committee and ASME, approval for the 1988 editionwas granted by ANSI on February 24, 1988.During 1993 and carrying over into 1994, revisions offered included multiple material markingand an improved interpolation procedure. N
40、ew materials were added and the pressuretemperature rating tables were recalculated in accordance with Nonmandatory Appendix B usingthe latest data available from the reference ASME Boiler and Pressure Vessel Code sources. Anappendix was added covering nonmandatory requirements for a quality system
41、program.Following the approvals the Standards Committee and ASME, approval for the new editionwas granted by ANSI on October 3, 1996.Work was started during 1999 to revise the Standard to include metric units as the primaryreference units while maintaining U.S. customary units in either parenthetica
42、l or separate forms.The goal is to delete the U.S. customary units in a future revision. All pressure-temperatureratings have been recalculated using data from the latest edition of the ASME Boiler and PressureVessel Code, Section II, Part D. As a result, some materials have been shifted to other ma
43、terialgroups and some changes were made to some valve ratings within material groups. Because ofdiminished interest for flanged end valves conforming to ASME Class 400, they are not specificallylisted in this revision. Flanges for Class 400 will continue to be listed in B16 flange standards.Provisio
44、ns were made to allow Class 400 valves to be furnished as intermediate rated valves.Numerous requirement clarifications and editorial revisions were also made.Work was started during 2007 to revise the Standard. Metric units remained the primaryreference units with U.S. Customary units in either par
45、enthetical or separate forms shown as inthe earlier edition. Pressuretemperature ratings, in some cases, were revised, and new materialswere added, all in keeping with the material properties provided in the latest edition of theASME Boiler and Pressure Vessel Code, Section II, Part D. A number of r
46、equirement clarificationsand editiorial revisions were also made.Following the approvals of the Standards Committee and ASME, approval for the 2009 editionwas granted by ANSI on June 18, 2009.Work was started during 2009 to correct material listings with the material groups. Additionally,B16.47 was
47、added as a reference, and flanged-end valves coverage was expanded to NPS 50. Anumber of requirement clarifications and editorial revisions have also been made.viFollowing the approvals of the Standards Committee and ASME, approval for the new editionwas granted by ANSI on February 19, 2013.All requ
48、ests for interpretation or suggestions for revisions should be sent to the Secretary,B16 Committee, The American Society of Mechanical Engineers, Two Park Avenue, New York,NY 10016-5990.viiASME B16 COMMITTEEStandardization of Valves, Flanges, Fittings, and Gaskets(The following is the roster of the
49、Committee at the time of approval of this Standard.)STANDARDS COMMITTEE OFFICERSW. B. Bedesem, ChairG. A. Jolly, Vice ChairC. E. OBrien, SecretarySTANDARDS COMMITTEE PERSONNELA. Appleton, Alloy Stainless Products Co., Inc.R. W. Barnes, ANRIC Enterprises, Inc.W. B. Bedesem, ConsultantR. M. Bojarczuk, ExxonMobil Research however, they shouldnot 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 pro
