【国际标准】AS 1722.2-1992 螺纹或惠氏螺纹管 第2部分螺纹扣件.pdf
[国际标准]AS1722.2-1992螺纹或惠氏螺纹管第2部分螺纹扣件标准
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[国际标准]AS1722.2-1992螺纹或惠氏螺纹管第2部分螺纹扣件标准,国际标准,AS1722,1992,螺纹,部分,扣件,标准
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AS 1722.21992Australian StandardPipe threads of Whitworth formPart 2: Fastening pipe threadsAccessed by UNIVERSITY OF SOUTH AUSTRALIA on 11 Feb 2007This Australian Standard was prepared by Committee ME/28, Screw Threads. It wasapproved on behalf of the Council of Standards Australia on 15 October 1991 andpublished on 17 January 1992.The following interests are represented on Committee ME/28:Confederation of Australian IndustryDepartment of DefenceDivision of Applied Physics, CSIROFasteners Institute of AustraliaFederal Chamber of Automotive IndustriesInstitute of Engineers, AustraliaInstitute of Production EngineersMetal Trades Industry Association of AustraliaRailways of Australia CommitteeTechnical and Further Education Commission, N.S.W.Review of Australian Standards. To keep abreast of progress in industry, Australian Standards are subjectto periodic review and are kept up to date by the issue of amendments or new editions as necessary. It isimportant therefore that Standards users ensure that they are in possession of the latest edition, and anyamendments thereto.Full details of all Australian Standards and related publications will be found in the Standards AustraliaCatalogue of Publications; this information is supplemented each month by the magazine The AustralianStandard, which subscribing members receive, and which gives details of new publications, new editionsand amendments, and of withdrawn Standards.Suggestions for improvements to Australian Standards, addressed to the head office of Standards Australia,are welcomed. Notification of any inaccuracy or ambiguity found in an Australian Standard should be madewithout delay in order that the matter may be investigated and appropriate action taken.This Standard was issued in draft form for comment as DR 91074.Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 11 Feb 2007标准分享网 w w w .b z f x w .c o m 免费下载AS 1722.21992Australian StandardPipe threads of Whitworth formPart 2: Fastening pipe threadsFirst published as AS B1541958(endorsement of BS 27791956 without amendment).Revised and redesignated AS 1722.21975.Second edition 1989.Third edition 1992.PUBLISHED BY STANDARDS AUSTRALIA(STANDARDS ASSOCIATION OF AUSTRALIA)1 THE CRESCENT, HOMEBUSH, NSW 2140ISBN 0 7262 7162 4Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 11 Feb 2007AS 1722.219922PREFACEThis Standard was prepared by the Standards Australia Committee on Screw Threads to supersedeAS 1722.21989. This Standard is technically equivalent to ISO 228/1, Pipe threads where pressure-tightjoints are not made on the threads, Part 1: Designation, dimensions and tolerances, and ISO 228/2, Pipethreads where pressure-tight joints are not made on the threads, Part 2: Verification by means of limitgauges.The 1989 edition which was based on the ISO 228/1 and 228/2documentscontained certaingauging/tolerance errors and omissions which could result in improper assessment of threads geometricqualities and was withdrawn.No changes to basic dimensions in the 1992 edition have been made with regard to the 1975 edition.Components made to the current edition are functionally identical and interchangeable with componentsmade to 1975 edition.Gauges manufactured to comply with the limits specified in AS 1722.21975 were intended to check thesame basic dimensions as those listed in AS 1722.2 1992 and may therefore continue to be used untilthey become worn beyond the permitted limits.The principal differences between this edition and the 1975 edition are as follows:(a)The design features of screw gauges are now explained.(b)Modified tables of dimensions for fastening pipe threads.(c)Modified tables for screw gauge limits.(d)Figures for thread profiles of GO ring gauges and their check plugs, relative positions of pitchdiameter tolerance zones for NOT GO ring gauges and their check plugs, are now included.(e)GO gauges now have wear allowance.(f)Symbols now align with ISO practice.(g)Provision for the use of roller type screw calliper gauges which are currently used in Australianpractice.(h)Setting plugs for GO and NOT GO screw calliper gauges are included.CopyrightSTANDARDS AUSTRALIAUsers of Standards are reminded that copyright subsists in all Standards Australia publications and software. Except where theCopyright Act allows and except where provided for below no publications or software produced by Standards Australia may bereproduced, stored in a retrieval system in any form or transmitted by any means without prior permission in writing fromStandards Australia. Permission may be conditional on an appropriate royalty payment. Requests for permission and information oncommercial software royalties should be directed to the head office of Standards Australia.Standards Australia will permit up to 10 percent of the technical content pages of a Standard to be copied for useexclusively in-house by purchasers of the Standard without payment of a royalty or advice to Standards Australia.Standards Australia will also permit the inclusion of its copyright material in computer software programs for no royaltypayment provided such programs are used exclusively in-house by the creators of the programs.Care should be taken to ensure that material used is from the current edition of the Standard and that it is updated whenever theStandard is amended or revised. The number and date of the Standard should therefore be clearly identified.The use of material in print form or in computer software programs to be used commercially, with or without payment, or incommercial contracts is subject to the payment of a royalty. This policy may be varied by Standards Australia at any time.Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 11 Feb 2007标准分享网 w w w .b z f x w .c o m 免费下载3AS 1722.21992CONTENTSPageSECTION 1 SCOPE AND GENERAL1.1SCOPE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41.2REFERENCED DOCUMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41.3DEFINITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41.4SYMBOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41.5CLASSIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51.6DESIGNATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5SECTION 2 THREAD PROFILES AND DIMENSIONS2.1PROFILE OF THREAD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62.2DIMENSIONS AND TOLERANCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6SECTION 3 GAUGES AND GAUGING PRACTICE3.1SCOPE OF SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83.2TYPES OF GAUGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83.3GENERAL CONSIDERATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83.4GAUGES FOR EXTERNAL THREADS AND THEIR CHECK PLUGS . . . . . . . . . . . .83.5GAUGES FOR INTERNAL THREADS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103.6DESIGN FEATURES OF SCREW GAUGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10APPENDIX A SCREW GAUGE LIMITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 11 Feb 2007AS 1722.219924STANDARDS AUSTRALIAAustralian StandardPipe threads of Whitworth formPart 2: Fastening pipe threadsSECTION 1 SCOPE AND GENERAL1.1 SCOPE This Standard specifies thread form, thread dimensions, tolerance, and associated gaugesand gauging practices for threads used for fastening pipes.The Standard covers pipe threads for pipe of nominal bore size 4 mm to 150 mm.NOTES:1Where these threads are used on pipes for conveying fluids, the sealing is effected by means other than thread interference(e.g. gaskets on flanges or O-rings).2Pipe threads of Whitworth form where pressure tight joints are made on the threads are specified in AS 17 REFERENCED DOCUMENTS The following Standards are referred to in this Standard:AS1098Roller-type screw calliper gauges1722Pipe threads of Whitworth form1722.1Part 1: Sealing pipe threads3501Parallel screw threads of Whitworth form (BSW and BSF) and associated gauges andgauging practice3528Cylindrical screw threadsVocabularyB129Designs for geometric limit gauges (plain and screwed in inch units)1.3 DEFINITIONS For the purpose of this Standard, the definitions given in AS 3528 apply.1.4 SYMBOLS The symbols used in this Standard are listed below.SymbolTermb3width of clearance groove at the major and minor diameter, respectively, of thethread profile with truncated flanksDbasic major diameter of the internal thread (= d)D1basic minor diameter of the internal thread (= D 1.280 654P = d1)D1,maxmaximum minor diameter of internal threadD1,minminimum minor diameter of internal threadD2basic pitch diameter of the internal thread (= D 0.640 327P = d2)dbasic major diameter of the external threaddmaxmaximum major diameter of external threaddminminimum major diameter of external threadd1basic minor diameter of the external thread (= d 1.280 654P = D1)d2basic pitch diameter of the external thread (= d 0.640 327P = D2)Hheight of the triangle of the thread profilehheight of the thread profile with rounded crests and rootsmdistance between the middle of the tolerance zone (TR) of the threaded ringgauge and the middle of the tolerance zone (TCP) of the GO check plugPpitchRradius of rounded crests and rootsStolerance for b3sdisplacement of the clearance groove with truncated flanksCOPYRIGHTAccessed by UNIVERSITY OF SOUTH AUSTRALIA on 11 Feb 2007标准分享网 w w w .b z f x w .c o m 免费下载5AS 1722.21992SymbolTermTCPtolerance for the pitch diameter of GO and NOT GO threaded check plugs andwear check plugsTD,1tolerance for the minor diameter of the internal threadTD,2tolerance for the pitch diameter of the internal threadTdtolerance for the major diameter of the external threadTd,2tolerance for the pitch diameter of the external threadTPLtolerance for the pitch diameter of GO and NOT GO threaded plug gaugesTRtolerance for the pitch diameter of GO and NOT GO threaded ring gaugesutwice the radial height of rounding at crest and root of thread (= 0.147 84P)WGOaverage amount available for the permissible wear of GO threaded plug gaugeand GO threaded ring gaugeWNGaverage amount available for the permissible wear of NOT GO threaded pluggauge and NOT GO threaded ring gaugeZPLdistance between the middle of the tolerance zone (TPL) of the GO threadedplug gauge and the lower limit of the threadZRdistance between the middle of the tolerance zone (TR) of the GO threaded pluggauge and the lower limit of the thread1.5 CLASSIFICATION For internal threads, one class of tolerance entirely positive is provided.For external threads, two classes of tolerance on the pitch diameter are provided, as follows:(a)Class A tolerance: entirely negative of equal numerical value to that provided for the internalthread tolerance (see Table 2.1).(b)Class B tolerance: entirely negative of value twice that of the Class A tolerance (see Table 2.1).NOTES:1Where no tolerance class is stated, Class B is assumed.2The tolerance zones are shown in Figure 2.2.3The choice of fit for a particular purpose rests with the purchasers designer.1.6 DESIGNATION Internal and external threads shall be designated by the letter G followed bythe thread size designation given in Table 2.1, and, for external threads, the tolerance class. Forexample, G1/2for an internal thread, G1/2A for a Class A external thread, and G1/2B for a Class Bexternal thread.NOTE: Where no tolerance class is stated for an external thread, Class B is assumed.COPYRIGHTAccessed by UNIVERSITY OF SOUTH AUSTRALIA on 11 Feb 2007AS 1722.219926SECTION 2 THREAD PROFILES AND DIMENSIONS2.1 PROFILE OF THREAD The basic profile of the thread shall be the basic Whitworth form asshown in Figure 2.1. This form is identical with that specified for the parallel thread in AS 1722.1.The internal and external threads covered by this Standard are both parallel.The crests of the threads may be truncated to the limits of tolerance as given in Figure DIMENSIONS AND TOLERANCES2.2.1 Dimensions The basic dimensions for the threads shall be as given in Table .2 Limiting dimension The limiting dimensions for major, pitch, and minor diameter shall be asgiven in Table 2.1. The pitch diameter tolerances are intended to include the diametral effect of pitchand angle errors.TABLE 2.1DIMENSIONS FOR FASTENING PIPE THREADS12345678910111213141516Designa-tion ofthreadsNumberofthreadsin25.4 mmPitch(P)Basicdiameter, mmLimits for external threaddiameters, mmLimits for internal threaddiameters, mmMajor(d = D)Pitch(d2= D2)Minor(d1= D1)Major diameter(Classes A andB)PitchdiameterPitchdiameterMinor diameterClassMin.Max.ABMin.Max.Min.Max.Min.Max.Min.Max.G1/16G1/8G1/42828190.9070.9071.3377.7239.72813.1577.1429.14712.3016.5618.56611.4457.5099.51412.9077.7239.72813.1577.0359.04012.1767.1429.14712.3016.9288.93312.0517.1429.14712.3017.1429.14712.3017.2499.25412.4266.5618.56611.4456.8438.84811.890G3/8G1/2G5/81914141.3371.8141.81416.66220.95522.91115.80619.79321.74914.95018.63220.58816.41220.67122.62716.66220.95522.91115.68119.65121.60715.80619.79321.74915.55619.50921.46515.80619.79321.74915.80619.79321.74915.93119.93521.89114.95018.63220.58815.39519.17321.129G3/4G7/8G1.01414111.8141.8142.30926.44130.20133.24925.27929.03931.77024.11827.87830.29226.15729.91732.88926.44130.20133.24925.13728.89731.59025.27929.03931.77024.99528.75531.41025.27929.03931.77025.27929.03931.77025.42129.18131.95024.11827.87830.29224.65928.41930.932G1 1/8G1 1/4G1 1/21111112.3092.3092.30937.89741.91047.80336.41840.43146.32434.94038.95344.84637.53741.55047.44337.89741.91047.80336.23840.25146.14436.41840.43146.32436.05840.07145.96436.41840.43146.32436.41840.43146.32436.59840.61146.50434.94038.95344.84635.58039.59345.486G1 3/4G2.0G2 1/41111112.3092.3092.30953.74659.61465.71052.26758.13564.23150.78956.65762.75353.38659.25465.27653.74659.61465.71052.08757.95564.01452.26758.13564.23151.90757.77563.79752.26758.13564.23152.26758.13564.23152.44758.31564.44850.78956.65762.75351.42957.29763.393G2 1/2G2 3/4G3.01111112.3092.3092.30975.18481.53487.88473.70580.05586.40572.22778.57784.92774.75081.10087.45075.18481.53487.88473.48879.83886.18873.70580.05586.40573.27179.62185.97173.70580.05586.40573.70580.05586.40573.92280.27286.62272.22778.57784.92772.86779.21785.567G3 1/2G4.0G4 1/21111112.3092.3092.309100.330113.030125.73098.851111.551124.25197.373110.073122.77399.896112.596125.296100.330113.030125.73098.634111.334124.03498.851111.551124.25198.417111.117123.81798.851111.551124.25198.851111.551124.25199.068111.768124.46897.373110.073122.77398.013110.713123.413G5.0G5 1/2G6.01111112.3092.3092.309138.430151.130163.830136.951149.651162.351135.473148.173160.873137.996150.696163.396138.430151.130163.830136.734149.434162.134136.951149.651162.351136.517149.217161.917136.951149.651162.351136.951149.651162.351137.168149.868162.568135.473148.173160.873136.113148.813161.513NOTE: Tolerances are not specified for the minordiameters of external threads nor for the majordiameters of internal threads. In practice,these diameterswill be controlled by the profiles of the tools used to cut the threads. The minor diameter of external threads should be not greater than the basic minordiameter, while the major diameter of internalthreads should be not smaller than the basic majordiameter.COPYRIGHTAccessed by UNIVERSITY OF SOUTH AUSTRALIA on 11 Feb 2007标准分享网 w w w .b z f x w .c o m 免费下载7AS 1722.21992LEGENDH= 0.960491Ph= 0.640327PR= 0.137329PFIGURE 2.1 BASIC PROFILE INTERNAL THREADS EXTERNAL THREADSFIGURE 2.2 LIMITING PROFILESCOPYRIGHTAccessed by UNIVERSITY OF SOUTH AUSTRALIA on 11 Feb 2007AS 1722.219928SECTION 3 GAUGESAND GAUGINGPRACTICE3.1 SCOPEOF SECTION ThisSection recommends the verification,by meansof limitgauges, of fasteningpipe threads of Whitworth form.The limiting dimensions of screw gauges, including associated check and setting gauges for fastening pipethreads of Whitworth form, are given in Appendix A.3.2 TYPES OF GAUGES Sincethe profile has different elements to be verified,it is necessary to providefor severalGO and several NOT GO gaugesas follows:(a)New threaded GO gauges (see Clauses 3.4.2 and 3.4.3) shall ensure that the profile of the threadedproduct does not exceed the maximum of material provided for by the tolerances applied to thedimensions of the profile defined in Clause 2.1.Worn gauges may allow the component to marginally exceed the maximum material limit as shown inFigures 3.3 and 3.4.(b)Thethreaded NOT GO gaugesforthe threadof theproduct(see Clauses 3.4.4and 3.4.5)fix theminimummaterial limit on the flanks of the thread.3.3 GENERALCONSIDERATIONSAllgaugesandtheir settingplugsand checkplugsshould be designedto be in accordance with the Taylor principle as far as possible. Although the use of a NOT GO ring gaugeor a GO calliper gauge is not in accordance with the Taylor principle, the practice of using these gauges isconsidered satisfactory.3.4 GAUGESFOR EXTERNALTHREADS AND THEIR CHECK PLUGS3.4.1 Solid GO threaded ring gauge Function The threaded GO ring gauge ensures that the maximum material limit of the thread is notexceeded. It checks the virtual size of the external thread, taking into account deviations of form (departuresfromroundness, lack of straightnessof thethreadaxis over the gaugelength) and pitch errors, helix variations,errors inthe flankangles,whichproduce an apparentenlargement ofthe pitchdiameter (virtualpitchdiameter).In addition, this gauge checks whetherthe lengthof the straight flank is adequate, i.e. that the rounding at theroot of the profile does not encroachtoo far upon the flank of the thread. Control The solid threaded GO ring gauge manufactured according to the prescribed sizes shall bechecked by thethreadedGO andNOT GOcheckplugs,and shouldbe regularlycontrolled withthe wearcheckplug.If the NOT GO check plug is not used, other provisions shallbe madeso as to ensure that the maximum sizeof the pitch diameter of the threadedGO ring gauge is not exceeded. Use The threaded GO ring gauge screwed by hand,without excessive force, shallpass overthe wholelength of the thread. If this is not possible, the thread does not comply with the specifications.3.4.2 Threaded check plugs for new solid threaded GO ringgauge Function These threaded check plugs (GO and NOT GO) are used to check the limits of the pitchdiameter of the new solid threaded GO ring gauge. The threaded GO check plug checks the GO limitof thetotal profile of the appropriate new solid threaded GO ring gauge. Use The threaded GO check plug screwed by hand, without excessive force, shall pass through thenew solid threaded GO ring gauge.The threaded NOT GO checkplug screwed by hand, without excessive force, may enter into both ends of thenew solid threaded GO ring gauge, but not more than one turn of thread.*3.4.3 Wear checkplug for solid threaded GO ring gauge Function The wear check plug is used to ascertain that the pitch diameter of the threaded GO ringgauge has not exceeded the wear limit. It embodies the pitch diameter of the threaded GO ring gauge at theprescribed limit of wear. Use The wear check plug screwed by hand,without excessive force, may enter into both ends of thethreaded GO ring gauge, but not more than one turn of thread.*If the wear checkplug can be screwed in morethan one turn of thread, the threadedGO ring gauge no longercomplies with the specifications.3.4.4 Solid threaded NOT GO ring gauge Function The threaded NOT GO ring gauge is intended to check whether the actual pitch diameterexceeds the specifiedminimumsize.The checking withthe threaded NOT GOring gaugedoes not correspondtotheTaylorprinciple whencheckingrigid machinedpieces.For non-rigidmachinedpieces, thedeparture fromthe Taylor principle is of less importance because of the flexibility of the pieces.*The number of turns of thread is determined when the plug or ring gauge is unscrewed.COPYRIGHTAccessed by UNIVERSITY OF SOUTH AUSTRALIA on 11 Feb 2007标准分享网 w w w .b z f x w .c o m 免费下载9AS 1722.2199 Control The solidthreaded NOT GO ring gauge manufactured according to the prescribed sizes shallbe checked by the threaded GO and NOT GO check plugs and should be regularly controlled with the wearcheck plug.If the NOT GO check plug is not used, other provisions shall be made to ensure that the maximum limit ofthe pitch diameter of the new threaded NOT GO ring gauge is not exceeded. Use The threaded NOT GO ring gauge, screwed by hand, without excessive force, onto the thread,may be screwed on both sides but not more than two turns of thread.*If the gauge canbe screwedmore than twoturns of thread,the threaddoes not complywith the specifications.The threaded NOT GO ring gauge shall not pass completely over a threaded part having a length of threethreads or less.3.4.5 Threaded check plugs for new solid NOT GO threaded ring gauge Function The checkplugs(GO andNOT GO) are used to check the pitch diameter limitsof the newsolid threaded NOT GO ring gauge. The threaded GO check plug makes sure that the clearance diameter ofthe new solid threaded NOT GO ring gauge is not too small. Use The threaded GO check plug screwed by hand, without excessive force, shall pass through thecorresponding new solid threaded NOT GO ring gauge.The NOT GO check plug gauge screwed by hand, without excessive force, may enterthe new solid threadedNOT GO ring gauge at both ends, but not more than one turn of thread.*3.4.6 Wear checkplug for solid NOT GO threaded ring gauge Function Thewear checkplug checkswhetherthe pitch diameterof thethreaded NOT GOring gaugehas exceeded the wear limit. It embodies the pitch diameter of the threaded NOT GO ring gauge at theprescribed limit of wear. Use The wear check plug screwed by hand,without excessive force, may enter into both ends of thethreaded NOT GO ring gauge but not more than one turn of thread.*If the wear check plug can be screwed in more than one turn of thread, the threaded NOT GO ringgauge nolonger meets the specifications.*3.4.7 Roller type GO screw callipergauge Function When used instead of a solid GO screw ring gauge this type of gauge has limitationsandis particularlyinsensitive to certainerrorsof geometry (e.g.lobing) whichmaybe presenton thescrew thread.In any dispute, gauging with a GO screw ring gauge shall be authoritative. Control The roller type GO screwcalliper gauge shall be set usinga GO settingplug which has beenmanufactured to the sizes set out in TableA6, Appendix A. Use These gauges are generally applied under their own weight or under a fixed working load to atleastthreepositionsevenlyspacedaroundthe circumferenceofthe productthread. Eachgauge mustcompletelypass over the product thread at all positions at whichit is applied.3.4.8 Roller type NOT GO thread calliper gauge Function A NOT GO screw calliper gauge conforms more closely to the Taylor principle than thealternative NOT GO screw ring gauge, and is intended to check whether the actual pitch diameter of theproduct thread exceeds the minimumsize. Control The roller type screw calliper gauge is set using a setting plug manufactured to the limits ofsize set out in Table A6, Appendix A. Use These gauges are generally applied under their own weight or under a fixed working load to atleastthree positions evenly spaced around the circumference of the productthread. Other than for the first twoturnsat the leading edgeof the product thread, the gauge mustnot passover the product threadat any positionat which it is applied.3.4.9 Settingplug for GO screwcalliper gauge A screwplug manufactured to the sizeshownin TableA6,Appendix A andhaving the form shown in Figure 3.5 is usedfor setting the GO screw calliper gauge to thelimiting size.3.4.10 Setting plug for NOT GO screw calliper gauge A screw plug manufactured to the sizes shown inTable A6, Appendix A and having the form shown in Figure 3.5 is used for setting the NOT GO screwcalliper gauge to the limiting size.3.4.11 NOT GO plaincallipergap gaugesfor externalthreads Themaximumand minimumlimits of sizeof the gap are shownin Table A4, Appendix A.*The number of turns of thread is determined when the plug or ring gauge is unscrewed.For a more detailed description see AS 1098.Form is the same for GO and NOT GO setting plugs.COPYRIGHTAccessed by UNIVERSITY OF SOUTH AUSTRALIA on 11 Feb 2007AS 1722.21992103.5 GAUGESFOR INTERNAL THREADS3.5.1 Threaded GO plug gauge Function The threaded GO plug gauge checks the virtualsize of the internal thread on the GO side(gauging the virtualpitch diameter), i.e. it checksthe minimumlimitof the pitchdiameter, taking intoaccountpitcherrors, errors in the flank angles, helixvariations and deviations of form (departures from roundness andlack of straightness of thethread axisover the gauge length)whichproducean apparent reduction of thepitchdiameter (virtual pitch diameter). In addition, it checks the minimum limit of the major diameter and alsowhether the length of straight flank is sufficient, i.e. that the rounding at the root of the profile does notencroach too far upon the flank of the thread. This gauge checks the maximum material limit. Control The threaded GO pluggauge should be checked regularly for wear. The wear of the threadedGO plug gauge is found by measuring. Use The threaded GO plug gauge screwed by hand, without excessive force, shall pass through thewhole length of the thread. If this is not possible, the thread does not comply with the specifications.3.5.2 Threaded NOT GO plug gauge Function The threaded NOT GO plug gauge checks whether the actual pitch diameter exceeds thespecified maximum size. Control The threaded NOT GO plug gauge shall be checked regularly for wear. The wear of thethreaded NOT GO plug gauge is found by measuring. Use The threaded NOT GOpluggauge screwed by hand,withoutexcessive force,may enter intobothends of the threaded part, but not more than two turns of thread.*If it can be screwedin more than twoturns of thread,*the threaddoes not complywith the specifications. Thethreaded NOT GO plug gauge shall not pass completely through a machined piece with a length of threethreads or less.3.5.3 NOT GO plain plug gauges for internal threads The maximum and minimum limits of size of thegauge are shown in Table A7, AppendixA.3.6 DESIGNFEATURES OF SCREWGAUGES3.6.1 Material All types of gauges (or gauging elements where applicable) shall be manufactured from astable, high quality tool steel or material having similar properties.3.6.2 Reference temperature The temperature to which the dimensions of the gauges is referredis 20C.3.6.3 MarkingEach gaugeshall be clearlyand permanently markedwith sufficientinformation necessary forpositive identification. For plug gaugeshaving renewable inserts,the information shall be marked on both thehandle and the gauging member (where practicable).The following particulars shall be included in the marking:(a)Thread designation (see Clause 1.6).(b)GO or NOT GO.(c)SET PLUG for setting plugs for adjustable screw gauges.(d)The manufacturers name or trademark.(e)A serial number, if required.Examples:1 GO screw plug: G1/2GO XYZ Ltd.2 NOT GO screw plug: G1/2NOT GO XYZ Ltd.3 GO screw ring: G1/2GO XYZ Ltd.4 NOT GO screw calliper: G1/2B NOT GO XYZ Ltd.3.6.4 Construction To facilitate the use of standard gauge blanks and associated handles, the generalconstruction of screwgaugesshould preferably be in accordance with AS B129;however, the axial length ofthe gauging surface may require modification in accordance with the following:(a)GO gauges for external and internal threads Ideally the axial length of gauge thread for GO gaugesisequal to the length of engagement of the assembled product and thread, and in any case should be notless than 80% of the length of engagement.(b)NOT GO gauges The axial length of gauge threads for NOT GO gauges shall be in accordance withAS B129, except that, for NOT GO screw calliper gauges, the length of threadshould not exceed threepitches for satisfactory functioning.*The number of turns of thread is determined when the plug is unscrewed.COPYRIGHTAccessed by UNIVERSITY OF SOUTH AUSTRALIA on 11 Feb 2007标准分享网 w w w .b z f x w .c o m 免费下载11AS 1722.219923.6.5 Breaking of sharpedges All undesirable sharp edges on all types of screw gauges and plain gaugesshall be removed.To avoid feather edges on screw plug gauges, screw ring gauges, and setting plugs, the partial thread at theendsof the gaugesshall normallybe removedto a bluntstart.Not more thanone completeturn of threadshallbe removed to the point where the full form thread is obtained (see Figure 3.1).FIGURE 3.1 BLUNT START AT END OF THREAD ON GAUGEFor screw ring gauges G1/16 and G1/8 a 60 chamfer is permitted in lieu of the removal of a partial thread.It is not necessary to remove the feather edge of screw plug gauges and setting plugs with external centres.3.6.6 Dirt grooves GO screwplug gaugesshould be provided with a dirtgroove cut axially to the threadtoa depthslightly below the threadroot. The grooveshallbe positionedat thepoint wherethe first threadattainsfull form and run the full length of the threaded portion.GO screw ring gauges G1/4 and larger should be provided with a dirt groove cut axially to the thread to adepth slightly below the thread root.3.6.7 Threaded gauges for external threads GO gaugesThe limitsof size for solid threaded GO screwring gauges and GO screw calliper gaugesfor ClassA and ClassB externalthreads shall be as givenin TableA.1, AppendixA. Theselimitsare derivedfrom the values given in Tables 2.1, 3.1 and 3.2. The tolerance zones are shown in Figure 3.3.Thevaluesspecifiedin Tables3.1and 3.2 forpitch(P) and toleranceon basic pitchdiameter (Td,2) areidenticalwith those given in Table 2.1.The length of the thread on the gauge shall be at least 80% of the thread length of the engaging part orcomponent (i.e. the thread length of, for example, a nut). Check plugs and setting plugs for GO screw ring and calliper gauges.(a)Checkplugsfor GO ringgaugesThe GO andNOT GO checkplugsfor thesolidthreadedGO ringgaugeare used to check the limits of the pitch diameter of a new gauge. The wear check plug is used toascertain that the pitchdiameterof the solidthreaded GO ringgauge has not exceeded the wear limit. Itembodies the pitch diameter of the solid threaded GO ring gauge at the prescribed limit of wear.(b)Setting plugs for GO screw calliper gauges Setting plugs shall be in accordance with Clause 3.4.9.The tolerance zones are shown in Figure3.4. The values of d, d1, and d2are as givenin Table 2.1.The solid threaded NOT GO ring gauge shall have a length of threadof at least three turns of thread. NOT GO gauges The limits of size for solid threaded NOT GO ring gauges and NOT GO screwcalliper gauges for Class A external threads shall be as given in Table A2, Appendix A. These limits arederived from the values given in Tables 2.1, 3.1 and 3.2. The limits of size for solid screw ring gauges andscrew calliper gauges for Class B external threads shall be as given in Table A3, Appendix A. These limitsare derived from values given in Tables 2.1, 2.3 and 3.3. Thread profiles shall be as shown in Figure .7.4 Checkplugsand settingplugs for NOT GO screwring andcalliper gaugesCheckplugsfor NOT GOscrew ring gauges and setting plugs for NOT GO screw calliper gauges are described below.(a)Check plugs for NOT GO ring gauges The GO and NOT GO check plugs for the solid threaded NOTGO ring gauge are usedto checkthe pitch diameter limits of a new gauge.The threaded GO check plugmakes sure that the clearance diameter of the gauge is not too small. The wear check plug is used tocheckwhetherthe pitch diameterof the gaugehas exceededthe wear limit.It embodies the pitchdiameterof the threaded NOT GO ring gauge at the prescribed limit of wear.(b)Setting plugsfor NOT GO screwcalliper gauges Setting plugsshall be in accordancewith Clause 3.4.10.Each setting plug shall have at leastthree complete threads.COPYRIGHTAccessed by UNIVERSITY OF SOUTH AUSTRALIA on 11 Feb 2007AS 1722.2199212TABLE 3.1DIMENSIONS FOR GO AND NOT GO GAUGES AND THEIR CHECK PLUGS FOR CLASS AEXTERNAL THREADS AND FOR GO GAUGES AND THEIR CHECK PLUGS FOR CLASS BEXTERNAL THREADSThread sizedesignationTd,2mTRmTPLmTCPmmmZRmWNGmWGmG1/16*G1/8*G1/4107107125151515101010999171717222131313181818G3/8G1/2G5/812514214215202010121291010172020299131717182323G3/4G7/8G1.0142142180202020121212101010202020999171717232323G1 1/8G1 1/4G1 1/2180180180202020121212101010202020999171717232323G1 3/4G2.0G2 1/41801802172020251212151010132020249913171721232328G2 1/2G2 3/4G3.0217217217252525151515131313242424131313212121282828G3 1/2G4.0G4 1/2217217217252525151515131313242424131313212121282828G5.0G5 1/2G6.0217217217252525151515131313242424131313212121282828*For G1/16 and G1/8 GO ring gauges, for a pitch of 0.907 mm, a profile is permittedwithout a radius, with an internal diameter,in millimetres,increased by the following(see also Figure 3.2(a):(d1+ 0.134 + TR/2) TR/2 = d1+ 0.142 0.0075.TABLE 3.2OTHER VALUES FOR GO AND NOT GO GAUGESAND THEIRCHECK PLUGS FORCLASS A AND CLASS B EXTERNAL THREADS AS A FUNCTIONOF PITCHThread sizedesignationPitch(P)mmNumber ofthreads in25.4 mmWidthof clearance groove at the majorand minor diameter of the threadprofile with shortened flanks (b3)mmTolerance on thehalf angle(27 30)of checkplugsand ring gauges(minutes)NominalTolerance (S)or as in NoteG1/160.9070.005*280 15G1/80.9070.005*280 15G1/41.337 0.005*190.4 0.04 13G3/81.337 0.005*190.4 0.04 13G1/21.814 0.005*140.5 0.05 11G5/81.814 0.005*140.5 0.05 11G3/41.814 0.005*140.5 0.05 11G7/81.814 0.005*140.5 0.05 11G1.02.309 0.005*110.8 0.05 10G1 1/82.309 0.005*110.8 0.05 10G1 1/42.309 0.005*110.8 0.05 10G1 1/22.309 0.005*110.8 0.05 10COPYRIGHTAccessed by UNIVERSITY OF SOUTH AUSTRALIA on 11 Feb 2007标准分享网 w w w .b z f x w .c o m 免费下载13AS 1722.21992TABLE 3.2 (continued)Thread sizedesignationPitch(P)mmNumber ofthreads in25.4 mmWidthof clearance groove at the majorand minor diameter of the threadprofile with shortened flanks (b3)mmTolerance on thehalf angle(27 30)of checkplugsand ring gauges(minutes)NominalTolerance (S)or as in NoteG1 3/42.3090.005*110.8 0.05 10G2.02.3090.005*110.80.05 10G2 1/42.309 0.005*110.8 0.05 10G2 1/22.309 0.005*110.8 0.05 10G2 3/42.309 0.005*110.8 0.05 10G3.02.309 0.005*110.8 0.05 10G3 1/22.309 0.005*110.8 0.05 10G4.02.309 0.005*110.8 0.05 10G4 1/22.309 0.005*110.8 0.05 10G5.02.309 0.005*110.8 0.05 10G5 1/22.309 0.005*110.8 0.05 10G6.02.309 0.005*110.8 0.05 10* When measured between any two threads over the length of the gauge or check plug.NOTE: The maximum displacementpermitted between the middle of the groove of width b3and that of the profile is equal to S. If theeffectivedisplacement (s) is less thanS, it is permissiblefor the upper limit of b3(nominal b3+ S) tobe exceededby twicethe difference(S s); thisis the equivalent of acceptingfor the distancebetween each lateral face of the groove andthe middleof the profilethe value(nominal b3+ S)/2 S.TABLE 3.3DIMENSIONS FOR NOT GO GAUGES AND THEIR CHECK PLUGS FORCLASS B EXTERNALTHREADSThread sizedesignationTd,2mTRmTPLmTCPmmmWNGmG1/16G1/8G1/4214214250252525151515131313242424212121G3/8G1/2G5/8250284284252525151515131313242424212121G3/4G7/8G1.0284284360252533151520131317242430212128G1 1/8G1 1/4G1 1/2360360360333333202020171717303030282828G1 3/4G2.0G2 1/4360360434333333202020171717303030282828G2 1/2G2 3/4G3.0434434434333333202020171717303030282828G3 1/2G4.0G4 1/2434434434333333202020171717303030282828G5.0G5 1/2G6.0434434434333333202020171717303030282828COPYRIGHTAccessed by UNIVERSITY OF SOUTH AUSTRALIA on 11 Feb 2007AS 1722.2199214(c) GO check plug (full form)for GO screw ring(a) GO ring (direct measurement)(b) GO check plugNumber ofthreads in25.4 mmu28191411mm0.1340.1980.2680.341u= 0.14784P(truncated)(d) NOT GO check plug(e) Wear check plug(f) Detail of clearance grooveof NOT GO check plugsand wear check plug* The form of the reliefis left to thediscretion of the manufacturer.NOTE: Care should be taken to ensure that units are consistentwhen dimensionsfor thread profilesare beingcalculated. The quantitiesd, d1, and d2are in millimetres;other quantities may have been specified in millimetres or micrometres.FIGURE 3.2 THREAD PROFILES OF GO RING GAUGES AND THEIR CHECK PLUGSCOPYRIGHTAccessed by UNIVERSITY OF SOUTH AUSTRALIA on 11 Feb 2007标准分享网 w w w .b z f x w .c o m 免费下载15AS 1722.21992FIGURE 3.3 RELATIVE POSITIONS OF PITCH DIAMETER TOLERANCE ZONES FORGO RING GAUGES AND THEIR CHECK PLUGSFIGURE 3.4 RELATIVE POSITIONS OF PITCH DIAMETER TOLERANCE ZONES FORNOT GO RING GAUGES AND THEIR CHECK PLUGSCOPYRIGHTAccessed by UNIVERSITY OF SOUTH AUSTRALIA on 11 Feb 2007AS 1722.2199216(a) NOT GO gauge(b) GO check plug for(c) NOT GO check plug forNOT GO ring gaugeNOT GO ring gauge(d) Wear check plug for(e) Detail of clearance(f) Setting gaugesNOT GO ring gaugegroove of NOT GO ring gauge* The form of the reliefis left to the discretion of the manufacturer. For moredetailed description, see AS 3501.NOTE: Care should be taken to ensure that unitsare consistentwhen dimensionsfor thread profilesare being calculated. The quantitiesd, d1, and d2are in millimetres;other quantities may have been specified in millimetres or micrometers.FIGURE 3.5 THREAD PROFILES OF NOT GO RING GAUGES AND THEIR CHECK PLUGS,CALLIPER GAUGES AND SETTING GAUGESCOPYRIGHTAccessed by UNIVERSITY OF SOUTH AUSTRALIA on 11 Feb 2007标准分享网 w w w .b z f x w .c o m 免费下载17AS 1722.219923.6.8 Threaded gauges for internalthreads The limitsof size for pluggaugesfor internal threads shall beas givenin TableA5, Appendix A. These limits are derivedfrom the valuesgiven in Tables2.1, 3.4 and 3.5.Thread profiles shall be as shown in Figure 3.6.The tolerance zones are shown in Figure3.7. The values of D, D1and D2are given in Table 2.1.The length of thread on the GO plug gauge shall be at least 80% of the thread of the engaging part orcomponent (i.e. the thread of, for example, a nut). The NOT GO plug gauge shall have a lengthof threadofat least three complete threads.TABLE 3.4DIMENSIONS FOR THREADEDGO AND NOT GO PLUGGAUGESThread sizedesignationTD,2mZPLmTPLmWNGmWGmG1/16*G1/8*G1/410710712588101010101010141414G3/8G1/2G5/812514214281313101212101313141919G3/4G7/8G1.0142142180131313121212131313191919G1 1/8G1 1/4G1 1/2180180180131313121212131313191919G1 3/4G2.0G2 1/4180180217131318121215131317191923G2 1/2G2 3/4G3.0217217217181818151515171717232323G3 1/2G4.0G4 1/2217217217181818151515171717232323G5.0G5 1/2G6.0217217217181818151515171717232323*For G1/16 and G1/8 GO plug gauges, for a pitch of 0.907 mm, a profile is permittedwithout a radius,with an internaldiameter,in millimetres,increased by the following(see also Figure 3.6):(D 0.134 TPL/2) TPL/2 = D 0.139 0.005.COPYRIGHTAccessed by UNIVERSITY OF SOUTH AUSTRALIA on 11 Feb 2007AS 1722.2199218TABLE 3.5OTHER VALUES FOR GO AND NOT GO PLUG GAUGES AS A FUNCTION OF PITCHThread sizedesignationPitch(P)mmNumber ofthreads in25.4 mmWidthof clearance groove at the majorand minor diameter of the threadprofile with shortened flanks (b3)mmTolerance on thehalf angle(27 30)(minutes)NominalTolerance (S)or as in NoteG1/160.9070.005*280 15G1/80.9070.005*280 15G1/41.337 0.005*190.4 0.04 13G3/81.337 0.005*190.4 0.04 13G1/21.814 0.005*140.5 0.05 11G5/81.814 0.005*140.5 0.05 11G3/41.814 0.005*140.5 0.05 11G7/81.814 0.005*140.5 0.05 11G1.02.309 0.005*110.8 0.05 10G1 1/82.309 0.005*110.8 0.05 10G1 1/42.309 0.005*110.8 0.05 10G1 1/22.309 0.005*110.8 0.05 10G1 3/42.309 0.005*110.8 0.05 10G2.02.309 0.005*110.8 0.05 10G2 1/42.309 0.005*110.8 0.05 10G2 1/22.309 0.005*110.8 0.05 10G2 3/42.309 0.005*110.8 0.05 10G3.02.309 0.005*110.8 0.05 10G3 1/22.309 0.005*110.8 0.05 10G4.02.309 0.005*110.8 0.05 10G4 1/22.309 0.005*110.8 0.05 10G5.02.309 0.005*110.8 0.05 10G5 1/22.309 0.005*110.8 0.05 10G6.02.309 0.005*110.8 0.05 10* When measured between any two threads over the length of the plug gauge.NOTE: The maximum displacementpermitted between the middle of the groove of width b3and that of the profile is equal to S. If theeffectivedisplacement (s) is less thanS, it is permissiblefor the upper limit of b3(nominal b3+ S) tobe exceededby twice the difference(S s); thisis the equivalent of acceptingfor the distance between each lateralface of the groove and the middleof the profile the value(nominal b3+ S)/2 S.COPYRIGHTAccessed by UNIVERSITY OF SOUTH AUSTRALIA on 11 Feb 2007标准分享网 w w w .b z f x w .c o m 免费下载19AS 1722.21992(a) GO plug gauge(b) NOT GO plug gauge(c) Details of clearance groove of NOT GO plug gauge* The form of the reliefis left to thediscretion of the manufacturer.NOTE: Care should be taken to ensure that units are consistentwhen dimensionsfor thread profilesare beingcalculated. The quantitiesD, D1, and D2are in millimetres;other quantities may have been specified in millimetres or micrometres.FIGURE 3.6 THREAD PROFILES OF GO AND NOT GO PLUG GAUGESCOPYRIGHTAccessed by UNIVERSITY OF SOUTH AUSTRALIA on 11 Feb 2007AS 1722.2199220FIGURE 3.7 RELATIVE POSITIONS OF PITCH DIAMETER TOLERANCE ZONES FOR GOAND NOT GO PLUG GAUGESCOPYRIGHTAccessed by UNIVERSITY OF SOUTH AUSTRALIA on 11 Feb 2007标准分享网 w w w .b z f x w .c o m 免费下载21AS 1722.21992APPENDIXASCREW GAUGE LIMITS(Normative)A1 SCOPE This Appendix gives the limiting dimensions for screw gauges, includingassociated check and setting gauges for fasteningpipe threadsof Whitworthform.Table A1 External thread, Classes A and B: Limits of size for GO screw ring and screwcalliper gauges and associated plug check gauges.Table A2 External thread, Class A: Limits of size for NOT GO screw ring and callipergauges and associated plug check gauges.Table A3 External thread, Class B: Limits of size for NOT GO screw ring and callipergauges and associated plug check gauges.Table A4 Limits of size for GO and NOT GO plain calliper (gap) gauges for majordiameters.Table A5 Internal thread: Limits of size for GO and NOT GO plug gauges.Table A6 External thread: Settingplugs for screw calliper gauges.Table A7 Limits of size for NOT GO plain plug for minor diameter.COPYRIGHTAccessed by UNIVERSITY OF SOUTH AUSTRALIA on 11 Feb 2007AS 1722.2199222TABLE A1EXTERNAL THREAD, CLASSES A AND B: LIMITS OF SIZE FOR GO SCREW RING AND SCREW CALLIPER GAUGES ANDASSOCIATED PLUG CHECK GAUGESDesigna-tion ofthreadNumberof threadsin25.4 mmGO screwring and GO screw callipergauges, mmTruncated GO screwcheck for GOscrew ring, mmFull form GO screw check for GOscrew ring, mmNOT GO screwcheckfor GO screwring, mmWear screwcheck for GO screw ring,mmMajordia-meterMin.PitchdiameterMinordiameterMajordiameterPitchdiameterMinordia-meterMax.MajordiameterPitchdiameterMinordia-meterMax.MajordiameterPitchdiameterMinordia-meterMax.MajordiameterPitchdiameterMinordia-meterMax.Min.Max.Min.Max.Min.Max.Min.Max.Min.Max.Min.Max.Min.Max.Min.Max.Min.Max.Min.Max.G1/16G1/8G1/42828197.7239.72813.1577.1329.13812.2927.1489.15212.3066.5468.55111.4306.5618.56611.4457.5799.58412.9497.5899.59412.9597.1189.12412.2787.1289.13212.2866.5468.55111.4307.7149.71913.1487.7239.72813.1577.1189.12412.2787.1289.13212.2866.5468.55111.4307.3249.32912.5697.3349.33912.5797.1439.14812.3027.1529.15712.3116.5468.55111.4307.3349.33912.5797.3449.34912.5897.1549.15812.3127.1629.16812.3226.5468.55111.430G3/8G1/2G5/819141416.66220.95522.91115.79619.77421.73015.81219.79421.75014.93518.61220.56814.95018.63220.58816.45420.67522.63116.46420.68722.64315.78219.75921.71515.79219.76921.72514.93518.61220.56816.65320.94522.90116.66220.95522.91115.78219.75921.71515.79219.76921.72514.93518.61220.56816.07420.15122.10716.08420.16322.11915.80719.78921.74515.81619.79921.75514.93518.61220.56816.08420.16422.12016.09420.17622.13215.81819.80221.75815.82619.81221.76814.93518.61220.568G3/4G7/8G1.014141126.44130.20133.24925.26029.02031.75125.28029.04031.77124.09827.85830.27224.11827.87830.29226.16129.92132.89626.17329.93332.90825.24529.00531.73625.25529.01531.74624.09827.85830.27226.43130.19133.23926.44130.20133.24925.24529.00531.73625.25529.01531.74624.09827.85830.27225.63729.39732.22725.64929.40932.23925.27529.03531.76625.28529.04531.77624.09827.85830.27225.65029.41032.24025.66229.42232.25225.28829.04831.77925.29829.05831.78924.09827.85830.272G1 1/8G1 1/4G1 1/211111137.89741.91047.80336.39940.41246.30536.41940.43246.32534.92038.93344.82634.94038.95344.84637.54441.55747.45037.55641.56947.46236.38440.39746.29036.39440.40746.30034.92038.93344.82637.88741.90047.79337.89741.91047.80336.38440.39746.29036.39440.40746.30034.92038.93344.82636.87540.88846.78136.88740.90046.79336.41440.42746.32036.42440.43746.33034.92038.93344.82636.88840.90146.79436.90040.91346.80636.42740.44046.33336.43740.45046.34334.92038.93344.826G1 3/4G2.0G2 1/411111153.74659.61465.71052.24858.11664.20652.26858.13664.23050.76956.63762.72850.78956.65762.75353.39359.26165.35453.40559.27365.36952.23358.10164.18852.24358.11164.20050.76956.63762.72853.73659.60465.69753.74659.61465.71052.23358.10164.18852.24358.11164.20050.76956.63762.72852.72458.59264.68552.73658.60464.70052.26358.13164.22452.27358.14164.23750.76956.63762.72852.73758.60564.70052.74958.61764.71552.27658.14464.23952.28658.15464.25250.76956.63762.728G2 1/2G2 3/4G3.011111175.18481.53487.88473.68080.03086.38073.70480.05486.40472.20278.55284.90272.22778.57784.92774.82881.17887.52874.84381.19387.54373.66280.01286.36273.67480.02486.37472.20278.55284.90275.17181.52187.87175.18481.53487.88473.66280.01286.36273.67480.02486.37472.20278.55284.90274.15980.50986.85974.17480.52486.87473.69880.04886.39873.71180.06186.41172.20278.55284.90274.17480.52486.87474.18980.53986.88973.71480.06486.41473.72680.07686.42672.20278.55284.902G3 1/2G4.0G4 1/2111111100.330113.030125.73098.826111.526124.22698.850111.550124.25097.348110.048122.74897.373110.073122.77399.974112.674125.37499.989112.689125.38998.808111.508124.20898.820111.520124.22097.348110.048122.748100.317113.017125.717100.330113.030125.73098.808111.508124.20898.820111.520124.22097.348110.048122.74899.305112.005124.70599.320112.020124.72098.844111.544124.24498.857111.557124.25797.348110.048122.74899.320112.020124.72099.335112.035124.73598.860111.560124.26098.872111.572124.27297.348110.048122.748G5.0G5 1/2G6.0111111138.430151.130163.830136.926149.626162.326136.950149.650162.350135.448148.148160.848135.473148.173160.873138.074150.774163.474138.089150.789163.489136.908149.608162.308136.920149.620162.320135.448148.148160.848138.417151.117163.817138.430151.130163.830136.908149.608162.308136.920149.620162.320135.448148.148160.848137.405150.105162.805137.420150.120162.820136.944149.644162.344136.957149.657162.357135.448148.148160.848137.420150.120162.820137.435150.135162.835136.960149.660162.360136.972149.672162.372135.448148.148160.848NOTE: Setting plus limits for calliper gauges are shown in Table A6.COPYRIGHTAccessed by UNIVERSITY OF SOUTH AUSTRALIA on 11 Feb 2007标准分享网 w w w .b z f x w .c o m 免费下载23AS 1722.21992TABLE A2EXTERNAL THREAD, CLASS A: LIMITS OF SIZE FOR NOT GO SCREW RING AND CALLIPER GAUGESANDASSOCIATED PLUG CHECKGAUGESDesignation ofthreadNumber ofthreadsin25.4 mmNOT GO screwring and NOT GO screwcalliper gauges, mmGO screwcheckfor NOT GO screwring,mmNOT GO screwcheckfor NOT GO screw ring,mmWear screwcheck for NOT GO screwring,mmMajordia-meterMin.PitchdiameterMinordiameterMajordiameterPitchdiameterMinordia-meterMax.MajordiameterPitchdiameterMinordia-meterMax.MajordiameterPitchdiameterMinordia-meterMax.Min.Max.Min.Max.Min.Max.Min.Max.Min.Max.Min.Max.Min.Max.Min.Max.G1/16G1/8G1/42828197.7389.74313.1727.0209.02512.1617.0359.04012.1766.8318.83611.8866.8618.86611.9167.7089.71313.1427.7389.74313.1727.0069.01112.1477.0159.02012.1566.5618.56611.4457.6069.61113.0227.6269.63113.0427.0309.03612.1727.0399.04412.1806.5618.56611.4457.6129.61613.0287.6329.63613.0487.0369.04112.1777.0459.05012.1866.5618.56611.445G3/8G1/2G5/819141416.67720.97522.93115.66619.63121.58715.68119.65121.60715.39119.25821.21415.42119.29821.25416.64720.93522.89116.67720.97522.93115.65219.61621.57215.66119.62621.58214.95018.63220.58816.52720.80122.75716.54720.82522.78115.67619.64621.60215.68619.65621.61214.95018.63220.58816.53220.80822.76416.55220.83222.78815.68219.65321.60915.69119.66321.61914.95018.63220.588G3/4G7/8G1.014141126.46130.22133.26925.11728.87731.57025.13728.89731.59024.74428.50431.09824.78428.54431.13826.42130.18133.22926.46130.22133.26925.10228.86231.55525.11228.87231.56524.11827.87830.29226.28730.04733.05726.31130.07133.08125.13228.89231.58525.14228.90231.59524.11827.87830.29226.29430.05433.06426.31830.07833.08825.13928.89931.59225.14928.90931.60224.11827.87830.292G1 1/8G1 1/4G1 1/211111137.91741.93047.82336.21840.23146.12436.23840.25146.14435.74639.75945.65235.78639.79945.69237.87741.89047.78337.91741.93047.82336.20340.21645.10936.21340.22646.11934.94038.95344.84637.70541.71847.61137.72941.74247.63536.23340.24646.13936.24340.25646.14934.94038.95344.84637.71241.72547.61837.73641.74947.64236.24040.25346.14636.25040.26346.15634.94038.95344.846G1 3/4G2.0G2 1/411111153.76659.63465.73552.06757.93563.98952.08757.95564.01451.59557.46363.51551.63557.50363.56553.72659.59465.68553.76659.63465.73552.05257.92063.97152.06257.93063.98450.78956.65762.75353.55459.42265.47853.57859.44665.50852.08257.95064.00852.09257.96064.02050.78956.65762.75353.56159.42965.48653.58559.45365.51652.08957.95764.01652.09957.96764.02950.78956.65762.753G2 1/2G2 3/4G3.011111175.20981.55987.90973.46379.81386.16373.48879.83886.18872.98979.33985.68973.03979.38985.73975.15981.50987.85975.20981.55987.90973.44579.79586.14573.45879.80886.15872.22778.57784.92774.95281.30287.65274.98281.33287.68273.48279.83286.18273.49479.84486.19472.22778.57784.92774.96081.31087.66074.99081.34087.69073.49079.84086.19073.50379.85386.20372.22778.57784.927G3 1/2G4.0G4 1/2111111100.355113.055125.75598.609111.309124.00998.634111.334124.03498.135110.835123.53598.185110.885123.585100.305113.005125.705100.355113.055125.75598.591111.291123.99198.604111.304124.00497.373110.073122.773100.098112.798125.498100.128112.828125.52898.628111.328124.02898.640111.340124.04097.373110.073122.773100.106112.806125.506100.136112.836125.53698.636111.336124.03698.649111.349124.04997.373110.073122.773G5.0G5 1/2G6.0111111138.455151.155163.855136.709149.409162.109136.734149.434162.134136.235148.935161.635136.285148.985161.685138.405151.105163.805138.455151.155163.855136.691149.391162.091136.704149.404162.140135.473148.173160.873138.198150.898163.598138.228150.928163.628136.728149.428162.128136.740149.440162.140135.473148.173160.873138.206150.906163.606138.236150.936163.636136.736149.436162.136136.749149.449162.149135.473148.173160.873NOTE: Setting plug limits for callipergauges are shown in Table A6.COPYRIGHTAccessed by UNIVERSITY OF SOUTH AUSTRALIA on 11 Feb 2007AS 1722.2199224TABLE A3EXTERNAL THREAD, CLASS B: LIMITS OF SIZE FOR NOT GO SCREW RING AND CALLIPER GAUGESAND ASSOCIATEDPLUG CHECK GAUGESDesignation ofthreadNumber ofthreadsin25.4 mmNOT GO screwring and NOT GO screwcalliper gauges, mmGO screwcheckfor NOT GO screwring,mmNOT GO screwcheckfor NOT GO screw ring,mmWear checkfor NOT GO screw ring,mmMajordia-meterMin.PitchdiameterMinordiameterMajordiameterPitchdiameterMinordia-meterMax.MajordiameterPitchdiameterMinordia-meterMax.MajordiameterPitchdiameterMinordia-meterMax.Min.Max.Min.Max.Min.Max.Min.Max.Min.Max.Min.Max.Min.Max.Min.Max.G1/16G1/8G1/42828197.7489.75313.1826.9038.90812.0266.9288.93312.0516.7098.71411.7466.7598.76411.7967.6989.70313.1327.7489.75313.1826.8858.89012.0086.8988.90312.0216.5618.56611.4457.4949.49912.8927.5249.52912.9226.9228.92612.0446.9348.94012.0586.5618.56611.4457.5029.50812.9007.5329.53812.9306.9308.93512.0536.9438.94812.0666.5618.56611.445G3/8G1/2G5/819141416.68720.98022.93615.53119.48421.44015.55619.50921.46515.25119.10921.06515.30119.15921.11516.63720.93022.88616.68720.98022.93615.51319.46621.42215.52619.47921.43514.95018.63220.58816.39720.65622.61216.42720.68622.64215.55019.50221.45815.56219.51621.47114.95018.63220.58816.40620.66422.62016.43520.69422.65015.55819.51121.46715.57119.52421.48014.95018.63220.588G3/4G7/8G1.014141126.46630.22633.28224.97028.73031.37724.99528.75531.41024.59528.35530.89924.64528.40530.96526.41630.17633.21626.46630.22633.28224.95228,71231.35524.96528.72531.37224.11827.87830.29226.14229.90232.86926.17229.93232.90924.98828.74831.40125.00228.76131.41824.11827.87830.29226.15029.91032.88026.18029.94032.92024.99728.75731.41325.01028.77031.43024.11827.87830.292G1 1/8G1 1/4G1 1/211111137.93041.94347.83636.02540.03845.93136.05840.07145.96435.54739.56045.45335.61339.62645.51937.86441.87747.77037.93041.94347.83636.00340.01645.90936.02040.03345.92634.94038.95344.84637.51741.53047.42337.55741.57047.46336.05040.06245.95636.06640.08045.97234.94038.95344.84637.52841.54247.43437.56841.58247.47436.06140.07445.96736.07840.09145.98434.94038.95344.846G1 3/4G2.0G2 1/411111153.77959.64765.74351.87457.74263.76451.90757.77563.79751.39657.26463.28651.46257.33063.35253.71359.58165.67753.77959.64765.74351.85257.72063.74251.86957.73763.75950.78956.65762.75353.36659.23465.25653.40659.27465.29651.89857.76663.78851.91657.78463.80650.78956.65762.75353.37859.24665.26853.41859.28665.30751.91057.77863.80051.92757.79563.81750.78956.65762.753G2 1/2G2 3/4G3.011111175.21781.56787.91773.23879.58885.93873.27179.62185.97172.76079.11085.46072.82679.17685.52675.15181.50187.85175.21781.56787.91773.21679.56685.91673.23379.58385.93372.22778.57784.92774.73081.03087.43074.77081.12087.47073.26279.61285.96273.28079.63085.98072.22778.57784.92774.74281.09287.44274.78281.13287.48273.27479.62485.97473.29179.64185.99172.22778.57784.927G3 1/2G4.0G4 1/2111111100.363113.063125.76398.384111.084123.78498.417111.117123.81797.906110.606123.30697.972110.672123.372100.297112.997125.697100.363113.063125.76398.362111.062123.76298.379111.079123.77997.373110.073122.77399.876112.576125.27699.916112.616125.31698.408111.108123.80898.426111.126123.82697.373110.073122.77399.887112.588125.28899.928112.628125.32898.420111.120123.82098.437111.137123.83797.373110.073122.773G5.0G5 1/2G6.0111111138.463151.163163.863136.484149.184161.884136.517149.217161.917136.006148.706161.406136.072148.772161.472138.397151.097163.797138.463151
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