1、BRITISH STANDARD BS1782:1951 Incorporating Amendment Nos.1,2,3,4,and5 Specification for Couplings for suction and delivery hose (1 1 / 2 in. to8in. nominal sizes) other than fire hose couplingsBS1782:1951 This BritishStandard, having been approved by the MechanicalEngineering IndustryStandards Commi
2、tteeand endorsed bytheChairman ofthe EngineeringDivisional Council, was published undertheauthority ofthe GeneralCouncilon 22August1951 BSI 12-1999 MEE/96/1 ISBN 0 580 02230 7 Co-operating organizations The Mechanical Engineering Industry Standards Committee, under whose supervision this BritishStan
3、dard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: Admiralty* Institute of Petroleum Air Ministry Institution of Civil Engineers Associated Offices Technical Committee Institution of Gas Engineers Association of Consu
4、lting Engineers Institution of Heating and Ventilating (Incorporated) Engineers British Chemical Plant Manufacturers Institution of Mechanical Engineers* Association Institution of Mechanical Engineers British Compressed Air Society* (Automobile Division) British Electrical and Allied Manufacturers
5、Institution of Production Engineers Association Locomotive Manufacturers Association British Engineers Association* Machine Tool Trades Association British Internal Combustion Engine Ministry of Fuel and Power Manufacturers Association Ministry of Labour and National Service British Iron and Steel F
6、ederation (Factory Department) British Railways, The Railway Executive Ministry of Supply* Crown Agents for the Colonies Ministry of Transport* Department of Scientific and Industrial Ministry of Works* Research Office of the High Commissioner for India Engineering Equipment Users Association War Of
7、fice* Institute of Marine Engineers The Government departments and scientific and industrial organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this standard: Association of Mining Electri
8、cal and Federation of Civil Engineering Contractors Mechanical Engineers Federation of Manufacturers of Contractors British Wrapped Rubber Hose Manufacturers Plant Association Federation of Painting Contractors Council of Underground Machinery Institution of Municipal Engineers Manufacturers Institu
9、tion of Water Engineers Cut Thread Screwing Tool Manufacturers National Association of Colliery Managers Association National Coal Board Federation of British Rubber Manufacturers Individual Manufacturers of couplings Associations Amendments issued since publication Amd. No. Date of issue Comments 2
10、321 October 1955 3378 June 1959 3659 January 1960 4789 January 1963 5878 July 1966 Indicated by a sideline in the marginBS1782:1951 BSI 12-1999 i Contents Page Co-operating organizations Inside front cover Foreword iii Part1. Screw type couplings 1 Scope 1 2 Designation of sizes of couplings 1 3 Gen
11、eral 1 4 Material 1 5 Dimensions 1 6 Workmanship 1 7 Screw threads 1 8 Washers 1 9 Wrenches 1 10 Interchangeability 1 11 Marking 1 12 Hydraulic test 2 13 Inspection 2 14 Test facilities 2 Part2. Swivelling ring swing bolt type couplings 15 Scope 28 16 Designation of sizes of couplings 28 17 General
12、28 18 Material 28 19 Dimensions 28 20 Workmanship 28 21 Screw threads 28 22 Interchangeability 28 23 Marking 28 24 Hydraulic test 28 25 Inspection 28 26 Test facilities 29 Figure 1 Assembly 2 Figure 2 Assembly 3 Figure 3 Assembly 4 Figure 4 Assembly 5 Figure 5 Assembly 6 Figure 6 Tail end, male 7 Fi
13、gure 7 Tail end, male 9 Figure 8 Tail end, female (full bore) 11 Figure 9 Tail end, female (reduced bore) 12 Figure 10 Coupling nut 13 Figure 11 Adaptor; parallel female BS pipe thread to male hose thread 15 Figure 12 Adaptor; taper female BS pipe thread to male hose thread 17 Figure 13 Adaptor; par
14、allel female B.S.P. thread to female hose thread 19 Figure 14 Adaptor; taper female BS pipe thread to female hose thread 21BS1782:1951 ii BSI 12-1999 Page Figure 15 Adaptor;4inch A.P.I. taper thread (A.P.I. Specification6a) to female hose thread 22 Figure 16 Adaptor;4inch A.P.I. taper thread (A.P.I.
15、 Specification6a) to male hose thread 23 Figure 17 Adaptor; double male hose thread 24 Figure 19 “C” Wrench 27 Figure 20 Coupling assembly 30 Figure 21 Female or washered half (three lugs) 31 Figure 22 Female or washered half (four lugs) 33 Figure 22A Alternative design of tail end when using hose t
16、o BS1102 type G 35 Figure 23 Male or swing bolt half (three lugs) 36 Figure 24 Male or swing bolt half (four lugs) 38 Figure 25 Details of drop bolt, pin and bolt for3 1 / 2 ,4,5 and6in. sizes of couplings 40 Figure 26 Details of drop bolt, pin and bolt for8in. size couplings 41 Figure 27 Retaining
17、screw 42 Table 1 Tail-end, male 8 Table 2 Tail-end, male 10 Table 3 11 Table 4 12 Table 5 14 Table 6 Adaptor, parallel female BS pipe thread to male hose thread 16 Table 7 Adaptor, taper female BS pipe thread to male hose thread 18 Table 8 Adaptor, parallel female B.S.P. thread to female hose thread
18、 20 Table 9 21 Table 10 Unified form of thread for coupling nut and tail end, male; and for adaptors 25 Table 11 27 Table 12 Dimensions for full-bore couplings 32 Table 13 Dimensions for tails of reduced bore couplings 32 Table 14 Dimensions for full-bore couplings 34 Table 15 Dimensions for tails o
19、f reduced bore couplings 34 Table 16 Dimensions for full-bore couplings 37 Table 17 Dimensions for tails of reduced bore couplings 37 Table 18 Dimensions for full-bore couplings 39 Table 19 Dimensions for tails of reduced bore couplings 39 Table 20 42BS1782:1951 BSI 12-1999 iii Foreword This standar
20、d makes reference to the following British Standards: BS15, Mild steel for general structural purposes. BS21, Pipe threads. BS192, Open-ended spanners (not including B.A. sizes). BS218, Leaded brass(58percent copper,2percent lead) forging stock and forgings. BS250, Wrought high tensile brass rods an
21、d sections (other than forging stock). BS336, Couplings, branch pipes, nozzles, strainers and auxiliaries for fire hose. BS1102, Rubber suction and discharge hose with woven fabric wire reinforcement. BS1154, Vulcanized natural rubber compounds. BS1400, Schedule for copper alloy ingots and copper an
22、d copper alloy castings. BS1580, Unified screw threads. and to the following American Petroleum Institute Specification: A.P.I. Specification 6A Threads in valves, fittings and flanges. This BritishStandard has been prepared under the authority of the Mechanical Engineering Industry Standards Commit
23、tee in response to a request from the Federation of Manufacturers of Contractors Plant. Experience made it evident that an improvement in the types of hose coupling was both desirable and necessary; the ordinary types were not sufficiently robust, they were too difficult to couple and a full bore co
24、upling could not be coupled to a restricted bore coupling without an adaptor. This standard deals with the types of couplings and adaptors for suction and delivery hose used by H.M. Forces, public works contractors, salvage engineers, and similar users. These couplings have been designed primarily f
25、or use with water, but they may be used for other suitable liquids. The couplings covered in Part1 of this standard are also suitable for use with compressed air. Two types of couplings are specified, the screw type and the swivellingring swing-bolt type; the design of the couplings differs from tha
26、t previously used in having ribbed instead of serrated tail ends. The screw type couplings have a thread of coarser pitch; the more robust thread and more substantial horns lead to easier coupling and confer ability to withstand rough usage. For any particular nominal size of coupling two diameters
27、of tail end are provided: a) Full bore, b) Reduced bore. The full bore coupling has a waterway equal to its nominal size and also equal to the outside diameter of the appropriate standard pipe for attaching to hose with enlarged ends. The reduced bore coupling is interchangeable with the full bore c
28、oupling, but has a tail end of outside diameter to suit canvas or other non-elastic hose of nominal bore. The Unified form of screw thread has been adopted for these couplings. The Unified screw thread system is the outcome of deliberations between the Governments of the United Kingdom, Canada and t
29、he United States of America, and is fully described in BS1580, “Unified screw threads.” The couplings may be secured to the hose by wiring, by clamps, or by clips. The clamps or clips should be located between the ridges of the coupling. In the case of wiring, the binding may extend the full length
30、of the coupling, i.e.along the depressions and over the central ridge, or it may be applied in separate sections, one for each depression. The wire binding should be properly tied off, and the adjacent turns of wire soldered to each other over a width of 1 / 2in.BS1782:1951 iv BSI 12-1999 To conform
31、 to usual practice, it is recommended that the female hose coupling should connect to both suction and delivery sides of the pump or source of supply. Straighteners and feed valves will, therefore, have a female coupling. Details of fire hose couplings are given in BS336, “Fire hose couplings (inclu
32、ding screwed outlets for hydrants), suction hose couplings and branch pipe and nozzle connections.” A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard
33、does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi to iv, pages1to42 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in
34、 the amendment table on the inside front cover.BS1782:1951 BSI 12-1999 1 Part 1. Screw type couplings 1 Scope Part1 of this standard covers1 1 / 2 ,2,2 1 / 2 ,3,3 1 / 2and4in. screw type couplings and adaptors for use in conjunction with suction and delivery hose intended for working pressures not e
35、xceeding100lb/sq. in. 2 Designation of sizes of couplings The size by which the coupling is designated shall be the nominal bore of the hose with which it is to be used. 3 General Unless otherwise specified, screw type couplings shall be supplied in sets comprising the following: 4 Material Coupling
36、s and adaptors shall be made from gun metal castings complying with specification LG2-C or from brass complying with specifications B2-C or B3-C, all in BS1400, “Copper alloy ingots and castings.” Hot pressings in accordance with BS218 are permissible, but the purchaser shall be given prior notifica
37、tion by the manufacturer of his intention to supply hot pressings. 5 Dimensions The dimensions of couplings and adaptors shall conform to those shown in Figure 6Figure 17 and Table 1Table 9. 6 Workmanship Workmanship and finish shall be of good quality. All burrs and sharp edges shall be removed. 7
38、Screw threads Screw threads, male and female, shall be the Unified form of screw thread complying with BS1580, “Unified screw threads,” but only those sizes set out in Table 10 shall be used. NOTEThe tolerances shown in Table 10 for6UNS threads have been calculated from the formulae given in BS1580.
39、 Screw threads on the adaptors may be either B.S.P. (taper or parallel) complying with BS21, “Pipe threads,” or A.P.I. (taper) complying with A.P.I. Specification 6A 1)for female threads. (See Figure 12Figure 17.) The first thread shall be chamfered to45 . 8 Washers Washers shall be made of speciall
40、y selected leather, of chloroprene to BS hardness71 to80 , rubber asbestos compound or other suitable approved material as specified by the purchaser. When not so specified the purchaser shall be given prior notification by the manufacturer of the type and quality of washer he intends to supply. 9 W
41、renches Wrenches shall be made of steel not inferior to BS15, “Structural steel,” and they shall be to the dimensions in Figure 19 and Table 11. 10 Interchangeability All corresponding parts shall be interchangeable, including the screw threads. 11 Marking Each set of couplings shall be legibly and
42、permanently marked with the manufacturers identification and the number of this BritishStandard, i.e.BS1782. NOTEThe mark BS1782 on or in relation to the product is a claim by the manufacturer that it complies with the requirements of the standard. The BritishStandards Institution is the owner of th
43、e registered certification trade mark. This is shown below enclosed in the words “Approved to BritishStandard”. This mark can be used only by manufacturers licensed under the certification mark scheme operated by the BSI. The presence of this mark on or in relation to a product is an assurance that
44、the goods have been produced to comply with the requirements of the BritishStandard under a system of supervision, control and testing operated during manufacture and including periodical inspection at the manufacturers works in accordance with the certification mark scheme of the BSI. Further parti
45、culars of the terms of licence may be obtained from the Director, BritishStandards Institution,2 Park Street, London, W.1. Full bore coupling a) Tail end male See Figure 1 b) Tail end female c) Coupling nut d) Washer Reduced bore coupling a) Tail end male See Figure 2 b) Tail end female c) Coupling
46、nut d) Washer 1) A.P.I. Specification6A, “Threads in valves, fittings and flanges”.BS1782:1951 2 BSI 12-1999 12 Hydraulic test Couplings assembled without hose shall, if required, be given a pressure test in the presence of the purchaser or his representative. This test is for the purpose of locatin
47、g porosity in the castings after machining, and also to test the merits of the joint. The hydraulic test pressure applied shall be200lb/sq. in. When couplings are being assembled for hydraulic test, only hand tightness is to be applied to the coupling, by means of the appropriate standard wrench ill
48、ustrated in Figure 19. Use shall not be made of any extension on the handle of the wrench, or of other means to produce excessive tightness. Couplings complying with this standard shall not show signs of leakage during this test, either by reason of defective joint or porosity of metal. 13 Inspectio
49、n The purchaser or his representative shall have access, at all reasonable times, to those portions of the works in which the couplings are being manufactured and in which the testing is taking place. 14 Test facilities The manufacturer shall supply, at his own cost, labour and appliances for making the tests on his premises in accordance with this standard. Failing the existence of facilities for making the prescribed tests at
