1、CopyrightedmaterialASME B1.20.2M-2006licensedPipe Threads,60 deg,to Stanford University by Thomson Scientific(www.General P),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.AN AMERICAN NATIONAL STANDARDsThe American Society ofMechanical Engi
2、neersUncntrolledwhenprinteCopyrighted materialDate of Issuance:June 15,2007This Standard will be revised when the Society approves the issuance of a new edition.There willbe no addenda or written interpretations of the requirements of this Standard issued to this edition.Periodically,certain actions
3、 of the ASME B1 Committee may be published as Cases.Cases arelicensed to Stanford University by Thomsonpublished on the ASME Web site under the Committee Pages at http:/cstools.asme.org as they areissued.ScientificASME is the registered trademark of The American Society of Mechanical Engineers.This
4、code or standard was developed under procedures accredited as meeting the criteria for American 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 propos
5、ed code or standard was madeavailable for public review and comment that provides an opportunity for additional public input from industry,academia,regulatory agencies,and the public-at-large.ASME does not approve,rate,or endorseany item,construction,proprietary device,or activity.ASME does not take
6、 any position with respect to the validity of any patent rights asserted in connection with any(),downloaded on Oct-05-2010 by Stanford Universityitems mentioned in this document,and does not undertake to insure anyone utilizing a standard against liability forinfringement of any applicable letters
7、patent,nor assumes any such liability.Users of a code or standard are expresslyadvised that determination of the validity of any such patent rights,and the risk of infringement of such rights,isentirely their own responsibility.Participation by federal agency representative(s)or person(s)affiliated
8、with industry is not to be interpreted asgovernment or industry endorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with the establishedUser.ASME procedures and policies,which precludes the issuance of interpretations
9、by individuals.No part of this document may be reproduced in any form,in an electronic retrieval system or otherwise,without the prior written permission of the publisher.The American Society of Mechanical EngineersThree Park Avenue,New York,NY 10016-5990Copyright 2007 byTHE AMERICAN SOCIETY OF MECH
10、ANICAL ENGINEERSNo further reproduction or distribution is permitted.All rights reservedPrinted in U.S.A.Uncontrolled wCopyrighted materialCONTENTSivCommittee RosterCorrespondence With the B1 Committee.vi11licensed to Stanford University by Thomson2Reference and Symbols.13Taper pipe Thread Form.14Sp
11、ecifications for General Purpose Taper Pipe Threads,NPT.8Scientific5Specifications for Internal Parallel Threads in Pipe Couplings,NPSC.86Gauges and Gauge Tolerances for Standard Pipe Thread,NPT.87Gauging of Taper Pipe Thread,NPT.118 Gauging of NPSC Parallel Pipe Threads.11().Figures1Standard Taper
12、Pipe Thread Notation.23Basic Profile of Standard Taper Pipe Thread.33Standard Taper Pipe Threads for Pressure-Tight Joints.54NPT Standard Taper Pipe Thread Plug and Ring Gauges.12downloaded onSuggested Form of Gauge Thread.126Gauging External Taper Threads With Ring Gauge，。,+，42Gauging Internal Tape
13、r Threads With Plug Gauge128Gauging of Chamfered Threads.18Tables00.201001 Limits on Crest and Root Truncation of Standard External and InternalTaper Pipe Threads.2Basic Thread Dimensions.6Stanford3Tolerances on Taper,Lead,and Angle of Pipe Threads,NPT.9Dimensions,Internal Parallel Threads in Pipe C
14、ouplings,NPSC.95Basic Dimensions of Plug and Ring Gauges for NPT Threads.13University6Tolerances for NPT Working Plug and Ring Gauges.14Diameter Equivalent of Variation in Lead for Tools and Gauges.16User.Diameter Equivalent of Variation in Half Included Angle of Thread forTools and Gauges.17Nonmand
15、atory AppendicesNo furtherA The Turns of Engagement Method of Verifying Product ThreadsB Tap Drill Sizes.20reproduction ordistribution is permitted.进Uncontrolled wFOREWORDThis Standard is a metric conversion of the data for NPT inch series taper pipe threads andNPSC inch series straight internal pip
16、e threads.The NPT and NPSC inch threads are includedin ANSI/ASME B1.20.1,Pipe Threads,General Purpose(Inch).Threads and gages delineatedherein are interchangeable with those in ANSI/ASME B1.20.1.Tabulated metric values have beenconverted from values in ANSI/ASME B1.20.1 and rounded in accordance wit
17、h ASME B1.30,Screw Threads:Standard Practice for Calculating and Rounding Dimensions.Values are givenin millimetersWhen compared to values calculated from formulas in this Standard,there may be a differencein the last decimal place but this will not affect interchangeability.The ASME B1 Subcommittee
18、 20prepared this metric Standard in order to encourage global use of the NPT Pipe Thread.For easeof use,both product threads and gauging are contained in this one Standard.NonmandatoryAppendices A and B are informative only and are not considered a part of this Standard.ASME B1.20.2M was approved by
19、 the American National Standards Institute on December21,2006.Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled wCopyrightedmaterialASME B1 COMMITTEEStan
20、dardization and Unification of Screw Threadslicensed to Stanford(The following is the roster of the Committee at the time of approval of this Standard.)STANDARDS COMMITTEE OFFICERSA.L.Barrows,ChairD.S.George,Vice ChairA.L.Guzman,SecretaryThomsonSTANDARDS COMMITTEE PERSONNELScientA.L.Barrows,Kennamet
21、al-IPGB.Larzelere,Corresponding Member,Deltronic Corp.F.G.Calderone,Corresponding Member,Quality SystemsL.L.Lord,Corresponding Member,Caterpillar,Inc.ImplementersM.H.McWilliams,PMC LonestarR.Dodge,Pennoyer-Dodge Co.D.Miskinis,Kennametal-IPGD.Everett,National Institute of Standards and TechnologyW.R.
22、Newman,Corresponding Member,ConsultantG.A.Flannery,Corresponding Member,Mercury Gage Co.D.R.Oas,Seaway Bolt and Specials Corp.H.N.Frost,Defense Supply Center PhiladelphiaM.W.Rose,Glastonbury Southern GageJ.O.Gehret Ill,Vermont Thread GageW.A.Watts,Alternate,Glastonbury Southern G)D.S.George,Ford Mot
23、or Co.E.Schwartz,ConsultantJ.R.Gervasi,Kerr Lakeside,Inc.R.H.Searr,Member Emeritus,Mak Tool and GageJ.Greenslade,Greenslade and Co.B.F.Sheffler,Dresser-Rand Co.L.C.Borowski,Alternate,Greenslade and Co.A.D.Shepherd,Jr.,Emuge Corp.A.L.Guzman,The American Society of Mechanical EngineersD.Skierski,Sterl
24、ing Gage and Calibration LLCdownloadedR.J.Hukari,SPS TechnologiesR.D.Strong,General Motors Corp.L.C.Johnson,The Johnson Gage CoA.F.Thibodeau,Member Emeritus,Swanson Tool Manufacturing%D.D.Katz,Precision FittingsCo.R.P.Knittel,Leitech-US Ltd.R.E.Vincent,Jr.,General Plug Manufacturing Co.8P.A.Larouche
25、,Swanson Tool Manufacturing CoC.J.Wilson,Industrial Fasteners Institute05-2010SUBCOMMITTEE 20-PIPE THREADSD.D.Katz,Chair,Precision FittingsR.P.Knittel,Leitech-US Ltd.K.Bly,Hemco GagesP.A.Larouche,Swanson Tool Manufacturing Co.StanfordM.Hop,Alternate,Hemco GagesB.Larzelere,Corresponding Member,Deltro
26、nic CorpF.G.Calderone,Corresponding Member,Quality SystemsM.H.McWilliams,PMC Lone StarImplementerD.R.Maisch,Alternate,PMC Lone StarJ.A.Casner,Corresponding Member,Casner Engineering ServicesD.R.Oas,Seaway Bolt and Specials CorpUniversityM.Cox,Corresponding Member,Frank J.Cox Sales,Ltd.J.R.Popovic,Cl
27、eveland Specialty Inspection ServicesR.Dodge,Pennoyer-Dodge Co.M.W.Rose,Glastonbury Southern GageUserG.A.Flannery,Corresponding Member,Mercury Gage Co.R.H.Searr,Corresponding Member,ConsultantD.D.Gajdosik,Besly Products Corp.A.D.Shepherd,Jr.,Emuge Corp.J.O.Gehret Ill,Vermont Thread GageD.Skierski,Sterling Gage and Calibration LLCJ.R.Gervasi,Kerr Lakeside,Inc.A.F.Thibodeau,Corresponding Member,Swanson ToolNo furtherJ.A.Gruber,Wheatland Tube CoManufacturing Co.L.C.Johnson,The Johnson Gage CoR.E.Vincent,Jr.,General Plug Manufacturing Coreproduction ordistribution ispermitted.Uncontrolled
