1、AN AMERICAN NATIONAL STANDARDMalleable Iron ThreadedFittingsClasses 150 and 300ASME B16.3-2006(Revision of ASME B16.3-1998)Copyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASME B16.3-2006(Revision
2、of ASME B16.3-1998)Malleable IronThreadedFittingsClasses 150 and 300AN AMERICAN NATIONAL STANDARDThree Park Avenue New York, NY 10016Copyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Date of Issuanc
3、e: April 30, 2007The next edition of this Standard is scheduled for publication in 2011. 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 t
4、he Committee Pages athttp:/cstools.asme.org as they are issued, and will be published within the next edition of thestandard.ASME is the registered trademark of The American Society of Mechanical Engineers.This code or standard was developed under procedures accredited as meeting the criteria for Am
5、erican NationalStandards. The Standards Committee that approved the code or standard was balanced to assure that individuals fromcompetent and concerned interests have had an opportunity to participate. The proposed code or standard was madeavailable for public review and comment that provides an op
6、portunity for additional public input from industry, academia,regulatory agencies, and the public-at-large.ASME does not “approve,” “rate,” or “endorse” any item, construction, proprietary device, or activity.ASME does not take any position with respect to the validity of any patent rights asserted
7、in connection with anyitems mentioned in this document, and does not undertake to insure anyone utilizing a standard against liability forinfringement of any applicable Letters Patent, nor assumes any such liability. Users of a code or standard are expresslyadvised that determination of the validity
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9、ponsibility for only those interpretations issued in accordance with governing ASME procedures andpolicies which precludes the issuance of interpretations by individual volunteers.No part of this document may be reproduced in any form,in an electronic retrieval system or otherwise,without the prior
10、written permission of the publisher.The American Society of Mechanical EngineersThree Park Avenue, New York, NY 10016-5990Copyright 2007 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.Copyright ASME International Provided by IHS under license with ASME Not for Resa
11、leNo reproduction or networking permitted without license from IHS-,-,-CONTENTSForeword ivCommittee Roster . vCorrespondence With the B16 Committee vi1 Scope . 12 PressureTemperature Ratings 13 Size. 24 Marking . 25 Material . 26 Dimensions and Tolerances . 27 Threading . 38 Ribs 39 Plugs, Bushings,
12、 and Locknuts . 310 Face Bevel. 311 Coatings 3Figures1 Identification of Reducing Fittings 22 Gaging of Chamfered Internal Threads 3Tables1 PressureTemperature Ratings 42 Inspection Tolerances . 43 Dimensions of Class 150, 90-deg Elbows, Tees, and Crosses, and 45-deg Elbows(Straight Sizes) . 54 Dime
13、nsions of Class 150, 90-deg Elbows and Crosses (Reducing Sizes) . 65 Dimensions of Class 150 Tees (Reducing Sizes) 76 Dimensions of Class 150, 45-deg Y-Branches (Straight Sizes) . 87 Dimensions of Class 150 Street Tees and 90-deg and 45-deg Street Elbows 98 Dimensions of Class 150 Couplings (Straigh
14、t and Reducing Sizes) 109 Dimensions of Class 150 Caps 1110 Dimensions of Class 150, Closed-, Medium-, and Open-Pattern Return Bends 1211 Dimensions of Class 300, 90-deg Elbows, Tees, and Crosses, and 45-deg Elbows(Straight Sizes) . 1312 Center-to-End Dimensions of Class 300, 90-deg Elbows (Reducing
15、 Sizes) . 1313 Center-to-End Dimensions of Class 300 Tees (Reducing Sizes) 1414 Dimensions of Class 300 Couplings . 1515 Dimensions of Class 300 Reducing Couplings . 1616 Dimensions of Class 300 Caps 1717 Dimensions of Class 300, 90-deg and 45-deg Street Elbows . 1818 Dimensions of Class 300 Return
16、Bends 18Mandatory AppendicesI Dimensions of Fittings in U.S. Customary Units . 19II References 35Nonmandatory AppendixA Quality System Program 36iiiCopyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-
17、FOREWORDIn 1921, the American Engineering Standards Committee, later the American Standards Associa-tion (ASA) and currently the American National Standards Institute (ANSI), authorized theorganization of a Sectional Committee on the Standardization of Pipe Flanges and FlangedFittings, with the foll
18、owing organizations as joint sponsors: Heating, Piping, and Air ConditioningContractors National Association (later the Mechanical Contractors Association of America,MCAA), Manufacturers Standardization Society of the Valves and Fittings Industry (MSS), andThe American Society of Mechanical Engineer
19、s (ASME).Threaded fittings were also included in the scope of the B16 Committee, and SubcommitteeNumber 2 (now Subcommittee B) was made responsible for threaded fittings other than steel.The first edition of a standard covering malleable iron fittings, 150 lb, was approved as AmericanTentative Stand
20、ard by ASA in December 1927. In 1936, a revision was undertaken to add hydraulicservice ratings, material specifications, alignment tolerances, and dimensions for additional sizes.It was approved with the designation American Standard B16c-1939.Pipe plugs, bushings, and locknuts, included in the fir
21、st editions, are now covered in a separatestandard, B16.14.A revision begun in 1947 amplified the sections on threading, inspection, and tolerances, andadded dimensions for additional sizes of elbows, reducing crosses, reducing tees, straight andreducing couplings, caps, and return bends. It was app
22、roved as ASA B16.3-1951.Meanwhile, MSS, in cooperation with the Association of American Railroads (AAR), developedthe first standard for 300 lb malleable iron threaded fittings, published as MSS SP-31 of 1932.The 1950 edition of SP-31, which agreed with AAR Purchase Specification M-404, was submitte
23、dto ASA Sectional Committee B16 and assigned to Subcommittee Number 2. After balloting, itwas approved as a separate standard, ASA B16.19-1951.Work was begun to combine the two standards (for 150 lb and 300 lb) into a single documentin 1961. The resulting Standard was approved as ASA B16.3-1963. Sub
24、sequent reviews of theStandard, leading to revisions approved as ANSI B16.3-1971 and ANSI B16.3-1977, involvedupdating referenced standards and the introduction of metric (SI) dimensions and ratings. In the1977 edition, 150 lb and 300 lb were redesignated as Class 150 and Class 300.In 1982, American
25、 National Standards Committee B16 became the ASME B16 Standards Com-mittee, operating with the same scope under ASME procedures accredited by ANSI. A furtherrevision of the standard, approved and published as ANSI/ASME B16.3-1985, provided forelectrodeposition as an alternative to hot dipping when z
26、inc coating was required.The 1992 edition of B16.3 omits metric units, establishing U.S. customary units as the standard.Clarifications and editorial revisions were made in order to improve the text. Following approvalby the Standards Committee and ASME, the 1992 edition received approval as an Amer
27、icanNational Standard on December 2, 1992, with the designation ASME B16.3-1992.In the 1998 edition of ASME B16.3, the References section was updated; a Quality SystemProgram Annex was added; and several editorial revisions were made. Following approval byASME B16 Subcommittee B and B16 Main Committ
28、ee, ANSI approved this American NationalStandard on November 20, 1998.In this edition, metric dimensions have become the primary units and inch dimensions areincorporated into this standard as secondary units and shown in parentheses. The added metricdimensions constitute an independent but equal st
29、andard to the inch units. Following approvalby the Standards Committee and the ASME Board, this revision to the 1998 edition of thisstandard was approved as an American National Standard by ANSI on November 9, 2006 withthe new designation, ASME B16.3-2006.Requests for interpretation and suggestions
30、for revision should be sent to the Secretary, B16Committee, The American Society of Mechanical Engineers, Three Park Avenue, New York, NY10016-5990.ivCopyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-
31、,-ASME B16 COMMITTEEStandardization of Valves, Flanges,Fittings, and Gaskets(The following is the roster of the Committee at the time of approval of this Standard.)STANDARDS COMMITTEE OFFICERSH. R. Sonderegger, ChairM. L. Nayyar, Vice ChairU. DUrso, SecretarySTANDARDS COMMITTEE PERSONNELR. W. Barnes
32、, Anric EnterprisesW. B. Bedesem, ExxonMobil Research Engineering Co.D. F. Buccicone, Elkhart Products Corp.M. A. Clark, Nibco, Inc.U. DUrso, The American Society of Mechanical EngineersC. E. Floren, Mueller Co.D. R. Frikken, Becht Engineering Co.G. G. Grills, U.S. Coast GuardM. L. Henderson, Forgit
33、al USAG. A. Jolly, Vogt Valves/Flowserve Corp.M. Kachter, Haynes InternationalW. N. McLean, Newco ValvesT. A. McMahon, Fisher Controls International, Inc.M. L. Nayyar, Bechtel Power Corp.J. D. Page, U.S. Nuclear Regulatory CommissionW. H. Patrick, The Dow Chemical Co.R. A. Schmidt, Hackney Ladish Co
34、.H. R. Sonderegger, Anvil International, Inc.W. M. Stephan, Flexitallic, Inc.D. A. Williams, Southern Company ServicesSUBCOMMITTEE B THREADED FITTINGS (EXCEPT STEEL), FLANGES, ANDFLANGED FITTINGSH. R. Sonderegger, Chair, Anvil International, Inc.K. Barron, Vice Chair, Ward ManufacturingS. Vasquez, S
35、ecretary, American Society of Mechanical EngineersM. A. Clark, Nibco, Inc.A. A. Knapp, A. Knapp and AssociatesR. L. Larkin, American Flow ControlP. I. McGrath, Jr., ConsultantW. N. McLean, Newco ValvesJ. K. Schultz, Conine Manufacturing Co., Inc.vCopyright ASME International Provided by IHS under li
36、cense with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-CORRESPONDENCE WITH THE B16 COMMITTEEGeneral. ASME Standards are developed and maintained with the intent to represent theconsensus of concerned interests. As such, users of this Standard may interact
37、with the Committeeby requesting interpretations, proposing revisions, and attending Committee meetings. Corre-spondence should be addressed to:Secretary, B16 Standards CommitteeThe American Society of Mechanical EngineersThree Park AvenueNew York, NY 10016-5990As an alternative, inquiries may be sub
38、mitted via e-mail to: SecretaryB16asme.org.Proposing Revisions. Revisions are made periodically to the Standard to incorporate changesthat appear necessary or desirable, as demonstrated by the experience gained from the applicationof the Standard. Approved revisions will be published periodically.Th
39、e Committee welcomes proposals for revisions to this Standard. Such proposals should beas specific as possible, citing the paragraph number(s), the proposed wording, and a detaileddescription of the reasons for the proposal, including any pertinent documentation.Interpretations. Upon request, the B1
40、6 Committee will render an interpretation of any require-ment of the Standard. Interpretations can only be rendered in response to a written request sentto the Secretary of the B16 Standards Committee.The request for interpretation should be clear and unambiguous. It is further recommendedthat the i
41、nquirer submit his/her request in the following format:Subject: Cite the applicable paragraph number(s) and the topic of the inquiry.Edition: Cite the applicable edition of the Standard for which the interpretation isbeing requested.Question: Phrase the question as a request for an interpretation of
42、 a specific requirementsuitable for general understanding and use, not as a request for an approvalof a proprietary design or situation. The inquirer may also include any plansor drawings, which are necessary to explain the question; however, theyshould not contain proprietary names or information.R
43、equests 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 inte
44、rpretation is available. Further, persons aggrieved by aninterpretation may appeal to the cognizant ASME Committee or Subcommittee. ASME does not“approve,” “certify,” “rate,” or “endorse” any item, construction, proprietary device, or activity.Attending Committee Meetings. The B16 Standards Committe
45、e regularly holds meetings, whichare open to the public. Persons wishing to attend any meeting should contact the Secretary ofthe B16 Standards Committee.viCopyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from
46、IHS-,-,-ASME B16.3-2006MALLEABLE IRON THREADED FITTINGSClasses 150 and 3001 SCOPE1.1 GeneralThis Standard covers malleable iron threaded fittings,Classes 150 and 300. It also contains provisions for usingsteel for caps and couplings in Class 150 for NPS38andsmaller. This Standard includes(a) pressur
47、etemperature ratings(b) size and method of designating openings of reduc-ing fittings(c) marking(d) material(e) dimensions and tolerances(f) threading(g) coatingsMandatory Appendix I provides table values in U.S.Customary units.1.2 ReferencesStandards and specifications adopted by reference inthis S
48、tandard are shown in Mandatory Appendix II. Itis not considered practical to identify the specific editionof each referenced standard and specification in the text.Instead, the specific editions of the referenced standardsand specifications are listed in Mandatory Appendix II.1.3 Quality SystemsRequ
49、irements relating to the product manufacturersQuality System Programs are described in Nonmanda-tory Appendix A.1.4 Relevant UnitsThis Standard states values in both metric and U.S.Customary units. These systems of units are to beregarded separately. Within the text, the U.S. Customaryunits are shown in parentheses or in separate tables.The values stated in each table are not exa
