1、BSI BS*bL 69 I Lb24bb O044002 b $ BRITISH STANDARD 61 : 1969 SPECIFICATION FOR THREADS FOR LIGHT GAUGE COPPER TUBES AND FITTINGS BRITISH STANDARDS INSTITUTION Gr 4 SPECIFICATION FOR THREADS FOR LIGHT GAUGE COPPER TUBES AND FITTINGS BS 61 : 1969 BRITISH STANDARDS INSTITUTION British Standards House,
2、2 Park St., London WIY 4AA Incorporated by Royal Charter Telegrams: Standards London Wi Telephone: 01-629 9ooo UDC 621.643.2 : 669.3-462 : 621.882.082 TIUS RRiTrsrr STANDARD, having been approved by the Mechanical Engineering Industry Standards Committee, was published under the authority of the Exe
3、cutive Board on 31st December, 1969. BS 61 Part 2 first published, April 1913. First revision, March 1946. SBN: 580 05724 O The Institution desires to call attention to the fact that this British Standard does not piirport to include all the necessary provisions of a contract. In order to keep abrea
4、st of progress in the industries concerned, British Standards are subject to periodical review. Suggestions for improvements will be recorded and in dile course brought to the notice of the committees charged with the revision of the standards to which they refer. A complete list of British Standard
5、s, numbering over 5000, fiilly indexed and with a note of the contents of each, will he found in the British Standards Yearbook. The BS Yearbook may be consulted in many public libraries and similar iiistitutions. This standard makes reference to the following British Siandards: BS 21. BS 66 in(lard
6、 specifies requirements for a series of threads intended for use wiili Iiglit gniige copper tubes and associated fittings, to US 66 and 69, BS 1306 and IJS 2871 : Part 7*! for whicli %:- threads to BS 21t are not suitable or cannot be utilized due to the thickness being insufficient. A 2. TERMINOLOG
7、Y AND DEFINITIONS Tlie following terminology and definitions arc extracted from BS 2517T which slioiild be consultcd for other ternis and definitions rclating to screw threads in general, Tlie following terms reink to the threads (see Fig. 1): (I) Gnrige rlimtieter. The basic major diameter of tlie
8、thread, whether external or internal (2) Gorge plme. Tlie plane, perpendicular to the axis, at which the major cone lias the gauge diameter. NOTE. Tlic gaiigc plane is tlieoreticnlly located at the face of the internal thread or at a disiiriicc cqiial to tlie basic gaiigc length from tlic small end
9、of the external thread. (3) Gnige Ietigtlr. On an external thread, the distance, parallel to the axis, froin tlie gnuge plane to tlie small end of the thread. (4) Cottiplets tiiread. That part of the thread which is fully formed at both crest and root. NOTE. When there is a chamfer at the start of t
10、he thread not exceeding one pitch in length, it is included in tlie length of complete thread. (5) ftrcottplete thread. That part of the thread which is fully formed at the root but truncated at tlie crest by its intersection with the cylindrical surface of the work. (6) Wnslioirt head (vntiislt /he
11、ad). That part of the thread which is not fully formed at the root. NOTE. The washout thread is produced by the bevel at (lie start of the threading tool, (7) Vntiisli cotte. An imaginary cone the siirface of which would pass through lie roots of the washout thread. (8) hfojor cotre, An imaginary co
12、nical siirface which just touches the crests of an external tliread or the roots of an internal thread. * BS 66 4 0,0625 1% 0,0625 1% 0.0625 1% 0.0781 1% 0.0938 1% 0.0938 1% 0,0938 1% 0.0938 18 Diametral tolerance on tlireiids (plus and ininus) in Pztfl; 0.0028 0.0039 0.0039 om39 0.0039 0.0039 0.003
13、9 0.0039 0.0049 . 00059 0.0059 00059 04lO59 I 19 . I Size nominal bore of tubel l in % JI 1 1% 1% 2 2% 3 3% 4 - 15 BRITISH STANDARDS INSTITCI0N The Bri!ish Standards Institution was foundcd in 1901 and incorporated by Royal Charter in 1929. lic principal objects of the Institution IP set out in tlie
14、 charter are to co-ordinate tlie effors cf producers and users for tlie iinprovenient, staiidardizatioii and siiiiiilificatioii of crigiiieering and industrial materials; to simplify prodiiclioii aiid dislribuiion ; to eliminate tlie waste of tinie and material involved in the pro- duction of an uii
15、neccssary variety of patterns and sizes of articles for one arid the saine purpm; to set up standards of quality aiid dimensions, aiiil to promote the general adoption of British Standards. In carrying out its work the Institution endeavours to ensure adequate representation of all viewpoints. Befor
16、e embarking on any project it must be satisfied that there is a strong body of opinioii in favour of proceeding aiid that there is a recognized need to be met. The Iiistitiition is a non-profit-making concern. It is financed hy subscriptions from nienibers-iiidivi- duals, companies, tccliiiical aiid
17、 trade associations, and otlier bodies intcrested in its work, by a Government grant and by the sale of its publicatioiis. Membership of the Institution coiifers il nuniber of specific rights and privileges. hc demands on the services of the Iiistitution arc steadily iiicreasing and can only be met
18、if contiiiuiiig and increased support is provided by those who use British Standards. 7810-0.2k-B 7 .* BSI BS*hL h I Lh24bh7 0044OL7 Z I 1 AMD 4431 Ameiidmeiit No. f to BS GI i 1969 published aiid effective from 30 April I984 Threads for light gauge copper tubes anri fittings Revised text Page 2. De
19、lete the list of reference standards and substitute the following: BS 21. BS 66 & 69. screwed copper tubes. BS 1306. Copper and copper alloy pressure piping systems. BS 2871 Copper and copper alloys. Tubes. Part 2. Tubes for general purposes. Pipe threads for tubes and fittings where pressure- tight
20、 joints are made on the threads. Cast copper alloy pipe fittings for use with Coiitetits. In the titles for both tables 1 and 2 delete to BS 61 : Part i, BS 66, BS 99 and BS 1306. Foreword. Delete the second paragraph and substitute tlie following: These threads are used mainly for the lighter type
21、of tubes or fittings to BS 66 & 69, BS 1306 and BS 2871 : Part 2*, when threads to BS 2 it are unsuitable or caiinot be utilized due to the thickness being insufficient. As siich they are supplementary to BS 21 which are recognized by 1SO 7 and which should be used wherever possible. Page 5. Delete
22、the footnotes at the foot of tlie page aiid substitute the following: * BS 66 & 69, Cast copper alloy pipe fittings for use with screwed copper tubes. BS 1306, Copper and copper alloy pressure piping systems. BS 2871, Copper and copper alloys. Tubes Part 2, Tubes for general purposes. threads. t BS
23、21, Pipe threads for tubes and fitfings where pressure-tight joints are made on flic Clause 1. Scope. In lines 2 and 3, delete BS 61 : Part 1,BS 66, BS 99 aiid LIS 1306” and substitute BS 66 and 69, BS 1306 and BS 2871 : Part 2*. In line 3, delete BSP. BSI BS*bL 69 I Lb2Llbb7 OOLiLi020 A w- . . a? C
24、lause 2. Termiiiology and definitions. Delete tlie first paragraph entirely. Page 6, Delete the footnotes at tile foot of the page and substitute the following: ?* BS 66 &, 69, ?Cast copper alloy pipe fittings for use with screwed copper tubes?. t BS 21, ?Pipe threads for tubes aiid fittings where p
25、ressure-tight joints are made on tlie BS 1306, ?Copper and copper alloy pressure piping systems?. BS 2871, ?Copper and copper alloys. Tubes? Part 2, ?Tubes for general purposes?. tiueads?.? Table 1. Basic dimensions and hits of size for tlireads for liglit gauge copper tubes atid fittiiigs to BS 61
26、: Part 1, BS 66, US 99 and BS 1306 (Basic gauge lengths and limits of size are based o11 turns of tliread) (Metric iiiiits) In tlie title delete ?to BS 61 : Part 1, BS 66, BS 99 and BS 1306?. Table 2. Basic dimensions and hits of size for tlireads for liglit gauge copper tubes and fittings to BS 61 : Part 1, BS 66, BS 99 and BS 1306 (Basic gauge lengths aiid limits of size are based on turns of tliread) (Iiiiperial units) In the title delete ?to BS 61 : Part I, BS 66, BS 99 and BS 1306?. 8404-0-1.5 k-B 2 MEEl28 7
