1、AS 1722.11975 Australian Standard Pipe threads of Whitworth form Part 1: Sealing pipe threads (metric units) The following scientific, industrial and governmental organizations and departments were officially represented on the committee entrusted with the preparation of this standard: Airconditioni

2、ng and Refrigeration Equipment Manufacturers Association of Australia Associated Chambers of Manufactures of Australia Australian and New Zealand Railways Conferences Australian Institute of Refrigeration, Air Conditioning and Heating Australian Liquefied Petroleum Gas Association Brassware Manufact

3、urers Association of Victoria Dairy Equipment Manufacturers Association of Australia Department of Defence (Army and Materials Research Laboratory) Department of Manufacturing Industry (Ammunitions Factory) Department of Technical Education, N.S.W. Electricity Supply Association of Australia Fastene

4、rs Institute of Australia Federal Chamber of Automotive Industries Federation of Automotive Products Manufacturers Metal Trades Industry Association of Australia National Measurement Laboratory Petroleum Refinery Engineers Advisory Committee Postmaster-Generals Department Society of Automotive Engin

5、eersAustralasia The Institution of Engineers, Australia The Institution of Production Engineers Sydney Metropolitan Water, Sewerage and Drainage Board This standard, prepared by Committee ME/28, Screw Threads, was approved on behalf of the Council of the Standards Association of Australia on 13 Nove

6、mber 1974. Review of Australian Standards. To keep abreast of progress in industry, Australian Standards are subject to periodic review and are kept up to date by the issue of amendments or new editions as necessary. It is important therefore that Standards users ensure that they are in possession o

7、f the latest edition, and any amendments thereto. Full details of all Australian Standards and related publications will be found in the Standards Australia Catalogue of Publications; this information is supplemented each month by the magazine The Australian Standard, which subscribing members recei

8、ve, and which gives details of new publications, new editions and amendments, and of withdrawn Standards.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 Standa

9、rd should be made without delay in order that the matter may be investigated and appropriate action taken. This standard was issued in draft form for public review as DR 73114. 標(biāo)準(zhǔn)分享網(wǎng) w w w .b z f x w .c o m 免費(fèi)下載 AS 1722.11975 Australian Standard Pipe threads of Whitworth form Part 1: Sealing pipe th

10、reads (metric units) First published. . . . . . . . . . . . . . . . . . . . . . . .1975 Reprinted . . . . . . . . . . . . . . . . . . . . . . . . . . . .1975 Reprinted . . . . . . . . . . . . . . . . . . . . . . . . . . . .1983 PUBLISHED BY STANDARDS AUSTRALIA (STANDARDS ASSOCIATION OF AUSTRALIA) 1

11、THE CRESCENT, HOMEBUSH, NSW 2140 ISBN 0 7262 0653 9 AS 1722, Part 119752 PREFACE This standard was prepared by the Associations Committee on Screw Threads as a metrication and revision of AS B53 1961 which was an endorsementwith amendment of BS 21:1957, and which it accordingly supersedes. Part 2 of

12、 this standard deals with fastening pipe threads, which were formerly specified in AS B154. Except for the method of designation, the external taper pipe threads and internal pipe threads given in this standard are in agreement with ISO 7* which was based on BS 21:1957, but it is wider in scope than

13、 both, particularly in the description of gauges and gauging methods. In response to a demand from Australian industry the long screw thread is included in this standard, but is not given in ISO 7. A new method of designating pipe threads is introduced. Current Australian practice is to designate pi

14、pe size by metric nominal bore (e.g. 50 NB) whereas ISO 7 designates pipe threads by imperial nominal bore (e.g. RP2). This standard reconciles these conflicting methods of designating by adopting a dual number (e.g. RP2/50). The standard retains the Gauging System B of BS 21:1957 as recommended in

15、the endorsement of that standard as AS B53. The committee is aware of the wide use of parallel ring gauges for gauging taper external threads and there are signs of a trend towards the use of these gauges in international standards; however at this time there are not national or international standa

16、rds for such gauges. Should there be further developments in this matter, the method of gauging in this standard will be reviewed. Attention is drawn to the use of the decimal comma in this standard. Its use in situations where ambiguity does not arise is recognized by the Metric Conversion Board, a

17、nd the comma is used in new Australian standards primarily concerned with drawing practice and workshop design. CopyrightSTANDARDS AUSTRALIA Users of Standards are reminded that copyright subsists in all Standards Australia publications and software. Except where the Copyright Act allows and except

18、where provided for below no publications or software produced by Standards Australia may be reproduced, stored in a retrieval system in any form or transmitted by any means without prior permission in writing from Standards Australia. Permission may be conditional on an appropriate royalty payment.

19、Requests for permission and information on commercial 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 use exclusively in-house by purchasers of the Standard

20、 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 royalty payment provided such programs are used exclusively in-house by the creators of the programs. Care should be taken

21、 to ensure that material used is from the current edition of the Standard and that it is updated whenever the Standard 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 comm

22、ercially, with or without payment, or in commercial contracts is subject to the payment of a royalty. This policy may be varied by Standards Australia at any time. *ISO 7, Pipe Threads for Gas List Tubes and Screwed Fittings Where Pressure-tight Joints are made on the Threads (1/8inch to 6 inches).

23、標(biāo)準(zhǔn)分享網(wǎng) w w w .b z f x w .c o m 免費(fèi)下載 3AS 1722, Part 11975 CONTENTS Page SECTION1. SCOPE ANDGENERAL 1.1Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 1.2Standard Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 1.3Designat

24、ion of Threads and Joints . . . . . . . . . . . . . . . . . . . . . . . .4 1.4Terms and Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 SECTION2. THREADFORM,LIMITS ANDASSEMBLY 2.1Basic and Design Forms (Profiles) . . . . . . . . . . . . . . . . . . . . . . .12 2.2Limiting

25、 Dimensions, Tolerances and Deviations. . . . . . . . . . . .13 2.3Assembly of Sealing Pipe Threads . . . . . . . . . . . . . . . . . . . . . . .15 SECTION3. GAUGES ANDGAUGINGPRACTICE 3.1General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 3.2Sealing Pipe Thr

26、eads, Series RC, RP and RTypes of Gauges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 3.3Description and Use of Gauges . . . . . . . . . . . . . . . . . . . . . . . . .16 3.4Dimensions and Tolerances . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 T

27、ABLES 1Limiting Dimensions for Taper Pipe Threads of Series R and RC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-9 2Limiting Dimensions for Internal Pipe Threads of Series RP. .10-11 2A Minimum Length of Useful Thread on Pipe End . . . . . . . . . . .10-11 3D

28、imensions of Taper Screw and Taper Plain Plug and Ring Gauges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20-21 4Tolerance for Gauges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22-23 FIGURES 1Terms Related to Pipe Threads. . . . . . . . . . . . . .

29、. . . . . . . . . . . .7 2Basic Whitworth Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 3Basic Form of Taper Pipe Thread. . . . . . . . . . . . . . . . . . . . . . .13 4Tolerance Zones for Diameters of Sealing Pipe Threads . . . . . . . .13 5Limiting Conditions of Hand-tight A

30、ssembly of Taper Screw Threads. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 6Taper Full Form Screw Ring Product Gauge . . . . . . . . . . . . . . . .18 7Taper Plain Ring Product Gauge . . . . . . . . . . . . . . . . . . . . . . . .18 8Taper Full Form Screw Plug

31、Product Gauge . . . . . . . . . . . . . . . .18 9Taper Plain Plug Product Gauge. . . . . . . . . . . . . . . . . . . . . . . .18 10Gauging External Product . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 11Gauging Internal Product. . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

32、9 AS 1772, Part 119754 STANDARDS ASSOCIATION OF AUSTRALIA Australian Standard for PIPE THREADS OF WHITWORTH FORM PART 1SEALING PIPE THREADS SECTION 1. SCOPE AND GENERAL 1.1 SCOPE.This standard specifies the geometry of screw threads suitable for connecting pipes (tubes) used for conveying fluids. It

33、 is based on ISO 7 and covers taper and parallel thread varieties, intended for sealing on the thread because of the taper. It also includes parallel external threads of the Longscrew Series of BS 21:1973, Pipe Threads for Tubes and Fittings where Pressure-tight Joints are made on the Threads (see C

34、lause 2.2.5). The standard covers the range of nominal bore sizes 1/16 in (4 mm) to 6 in (150 mm) both inclusive. 1.2 STANDARD SERIES. The standard provides for two series of internal threads and two of external threads as follows: Internal taper pipe threadSeries designation RC Internal parallel pi

35、pe threadSeries designation RP External taper pipe threadSeries designation R External parallel longscrew threadSeries designation RL. 1.3DESIGNATION OF THREADS AND JOINTS. The full designation of pipe threads and threaded pipe joints, subject to provisions of this specification, shall comprise the

36、series designation followed by the nominal size (bore) expressed in inches and in millimetres, as shown in the example below (for nominal sizes see columns 1 and 2 of Tables 1 and 2). (a)Examples of complete designations.Designation Sealing taper pipe thread, external, nominal size = 1/8/6 R1/8/6 Se

37、aling taper pipe thread, internal, nominal size = 11/2/40RC11/2/40 Sealing parallel pipe thread, internal, nominal size = 5/125. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .RP5/125 Sealing parallel longscrew thread, external, nominal size = 1/25RL1/25 COPYRIGHT 標(biāo)準(zhǔn)分享網(wǎng) w

38、 w w .b z f x w .c o m 免費(fèi)下載 5AS 1772, Part 11975 (b) Examples of designations for threaded pipe joints. Sealing on thread pipe connection, taper external thread and parallel internal thread of 3/4/20 nominal size RP/R 3/4/20 Sealing type connection of longscrew thread and RP socketRP/RL 3/8/10 1.4 T

39、ERMS AND DEFINITIONS. For general screw thread terms and definitions see AS ., Screw Thread Terms and Definitions.* Certain important terms for taper pipe threads are defined below (see also Fig. 1). 1.4.1 Pitch conean imaginary cone, which intersects the surface of a taper thread in such a manner t

40、hat the axial distance between the points where a generator of the cone meets the opposite flanks of the thread groove is equal to half the basic pitch of the thread. 1.4.2 Major conean imaginary cone which just touches the crests of an external thread or the roots of an internal thread. 1.4.3 Minor

41、 conean imaginary cone which just touches the roots of an external thread or the crests of an internal thread. 1.4.4 Gauge diameterthe basic major diameter of the taper thread, whether external or internal. 1.4.5 Gauge planethe plane perpendicular to the axis at which the major cone has the gauge di

42、ameter value. 1.4.6 Simple pitch diameter (pitch diameter)the diameter of the pitch cone in the gauge plane. 1.4.7 Major diameterthe diameter of the major cone in the gauge plane. 1.4.8 Minor diameterthe diameter of the minor cone in the gauge plane. 1.4.9 End face of external threada plane perpendi

43、cular to the axis at the small diameter end of the external taper thread. 1.4.10 End face of internal threada plane perpendicular to the axis at the large diameter end of the internal taper thread. 1.4.11 Gauge lengththe axial distance from the gauge plane to the end face of a taper thread. 1.4.12 F

44、ull thread (complete thread) the part of the thread which is fully formed at both crest and root. 1.4.13 Incomplete thread (truncated thread)the part of the thread which is fully formed at the root but truncated (in excess of usual profile truncation) at the crests. *In course of preparation. COPYRI

45、GHT AS 1772, Part 119756 1.4.14 Runoutthread (washout thread) (vanish thread)the part of the thread which is not fully formed at the roots. 1.4.15 Useful threadthis comprises the complete thread and incomplete threads, but excludes the runout threads. 1.4.16 Total threadthis comprises the useful and

46、 runout threads. 1.4.17 Vanish conean imaginary cone the surface of which would pass through the roots of the runout thread. 1.4.18 Fitting allowancethe length of useful thread on that side of the gauge plane remote from the end face of an external taper thread. NOTE: The value of fitting allowance

47、is equal to the difference between the length of useful thread and the gauge length. 1.4.19 Wrenching allowancethat part of the useful thread length of an externally taper threaded component which is provided to accommodate the relative movement between the externally and internally threaded parts w

48、hen wrenching beyond the position of hand-tight engagement. NOTE: The wrenching allowance is equal to the difference between the fitting allowance and the positive tolerance on the position of the gauge plane relative to the end face of the internal thread. COPYRIGHT 標(biāo)準(zhǔn)分享網(wǎng) w w w .b z f x w .c o m 免費(fèi)

49、下載 7AS 1772, Part 11975 Fig. 1(b) Series RC LEGEND DGGauge diameterLU Length of useful thread LGGauge lengthLW Length of washout thread LFLength of completeTLGTolerance on gauge (full) threadlength LTLength of incomplete (truncated) thread Note: The alternative suffixes s and n have to be added to t

50、he above symbols when necessary to indicate specifically external or internal threads, e.g. TLGsor LUnetc LALength available for accommodating external thread in internally threaded component LRLength reserve in internally threaded component after hand-tight assembly (LRn(min) = AW) Fig. 1(c)AFFitti

51、ng allowanceMMCMaximum material condition Series RC and RPAWWrenching allowanceLMCLeast material condition Fig. 1. TERMS RELATED TO PIPE THREADS COPYRIGHT AS 1722, Part 119758 & 9 TABLE 1 LIMITING DIMENSIONS FOR TAPER PIPE THREADS OF SERIES R AND RC 1234567891011121314151617181920 Nominal size* Thre

52、ads per inch External (R) and internal (RC) seriesSeries R External threadsSeries RC Internal threads Pitch p Depth of thread h Diameters at gauge plane (datum diameters) mm Gauge length Fitting allowance Wrenching allowance Diametral equivalent of Tolerance on gauge plane position Accommo- dation l

53、ength LA min. Diametral equivalent of Basic Tolerance MajorPitchMinormin.min. inmmTPImmmmDGEdmmmmPitchesPitchesmmPitchesmmmmPitchesmmmmmm 1/16 1/8 1/4 3/8 4 6 8 10 28 28 19 19 0,907 0,907 1,337 1,337 0,581 0,581 0,856 0,856 7,723 9,728 13,157 16,662 7,142 9,147 12,301 15,806 6,561 8,566 11,445 14,95

54、0 4,0 4,0 6,0 6,4 0,9 0,9 1,3 1,3 1 1 1 1 2,75 2,75 2,75 2,75 2,5 2,5 3,7 3,7 1,5 1,5 1,5 1,5 1,4 1,4 2,0 2,0 0,056 0,056 0,083 0,083 1,25 1,25 1,25 1,25 1,133 1,133 1,671 1,671 7,4 7,4 11,0 11,4 0,071 0,071 0,104 0,104 1/2 3/4 1 11/4 15 20 25 32 14 14 11 11 1,814 1,814 2,309 2,309 1,162 1,162 1,479

55、 1,479 20,955 26,441 33,249 41,910 19,793 25,279 31,770 40,431 18,631 24,117 30,291 38,952 8,2 9,5 10,4 12,7 1,8 1,8 2,3 2,3 1 1 1 1 2,75 2,75 2,75 2,75 5,0 5,0 6,4 6,4 1,5 1,5 1,5 1,5 2,7 2,7 3,5 3,5 0,114 0,114 0,144 0,144 1,25 1,25 1,25 1,25 2,268 2,268 2,886 2,886 15,0 16,3 19,1 21,4 0,142 0,142

56、 0,180 0,180 11/2 2 21/2 3 40 50 65 80 11 11 11 11 2,309 2,309 2,309 2,309 1,479 1,479 1,479 1,479 47,803 59,614 75,184 87,884 46,324 58,135 73,705 86,405 44,845 56,656 72,226 84,926 12,7 15,9 17,5 20,6 2,3 2,3 3,5 3,5 1 1 1,5 1,5 2,75 3,25 4,00 4,00 6,4 7,5 9,2 9,2 1,5 2,0 2,5 2,5 3,5 4,6 5,8 5,8 0

57、,144 0,144 0,216 0,216 1,25 1,25 1,50 1,50 2,886 2,886 3,464 3,464 21,4 25,7 30,2 33,3 0,180 0,180 0,216 0,216 31/2 4 5 6 90 100 125 150 11 11 11 11 2,309 2,309 2,309 2,309 1,479 1,479 1,479 1,479 100,330 113,030 138,430 163,830 98,851 111,551 136,951 162,351 97,372 110,072 135,472 160,872 22,2 25,4

58、 28,6 28,6 3,5 3,5 3,5 3,5 1,5 1,5 1,5 1,5 4,00 4,50 5,00 5,00 9,2 10,4 11,5 11,5 2,5 3,0 3,5 3,5 5,8 6,9 8,1 8,1 0,216 0,216 0,216 0,216 1,50 1,50 1,50 1,50 3,464 3,464 3,464 3,464 35,0 39,3 43,6 43,6 0,216 0,216 0,216 0,216 *See Clause 1.3. Major diameter at gauge plane = Gauge diameter Values in

59、millimetres in columns 9, 10, 13, 15 and 18 are calculated from those expressed in number of pitches and are rounded. Fitting allowance + Gauge length = Length of useful thread. The values in columns 16 and 20 are based on values of columns 11 and 17 respectively and are rounded. Basic gauge length for Series RC = LGn= 0. COPYRIGHT 標(biāo)準(zhǔn)分享網(wǎng) w w w .b z f x w .c o m 免費(fèi)下載 10 & 11AS 1722, Part 11975 TABLE 2 LIMITING DIMENSIONS FOR INTERNAL PIPE THREADS OF SERIES RP 1234567891011121314 Nominal size* threads per inch Pitch Depth of thread Limiting diameters, mm Tolerance on position of