《BS-6087-1990.pdf》由会员分享,可在线阅读,更多相关《BS-6087-1990.pdf(10页珍藏版)》请在三一文库上搜索。
1、BRITISH STANDARD BS 6087:1990 Incorporating Amendment No. 1 Specification for flexible joints for grey or ductile cast iron drainpipes and fittings (BS 437) and for discharge and ventilating pipes and fittings (BS 416) Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 05:51:19 GMT+00:00 2006, U
2、ncontrolled Copy, (c) BSI BS 6087:1990 This British Standard, having been prepared under the direction of the Building Service Standards Policy Committee, was published under the authority of the Board of BSI and comes into effect on 31 July 1990 BSI 04-1999 First published July 1981 Second edition
3、31 July 1990 The following BSI references relate to the work on this standard: Committee references SEB/39 Draft for comment 88/13348 DC ISBN 0 580 18760 8 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Building Service Standards Policy
4、 Committee (SEB/-) to Technical Committee (SEB/39), upon which the following bodies were represented: Aluminium Federation British Cast Iron Research Association (BCIRA) British Foundry Association Builders Merchants Federation Copper Development Association Department of the Environment (Property S
5、ervices Agency) Ductile Iron Producers Association Institute of British Foundrymen Institute of Plumbing Light Metal Founders Association National Association of Plumbing, Heating and Mechanical Services Contractors National Metal Trades Federation Amendments issued since publication Amd. No.Date of
6、 issueComments 6357June 1991Indicated by a sideline in the margin Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 05:51:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6087:1990 BSI 04-1999i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2Definitions1 3Design1 4Mat
7、erials1 5Testing1 6Marking2 Appendix A Mechanical tests3 Appendix B Electrical continuity test4 Appendix C Options for specifiers and purchasers4 Figure 1 Typical arrangement of straight draw test3 Figure 2 Typical arrangement of shear loading test4 Table 1 Angle of deflection3 Publications referred
8、 toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 05:51:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6087:1990 ii BSI 04-1999 Foreword This British Standard has been prepared under the direction of the Building Service Standards Policy Committee and covers all types of
9、flexible joints which are used as an alternative to caulked joints. The joints are for use with grey or ductile cast iron pipes and fittings specified in BS 437 and BS 416. This edition supersedes BS 6087:1981 which is withdrawn. In revising the first edition, the main changes are as follows. a) It
10、is made clear that the specification refers to both grey and ductile cast iron pipes and fittings, in line with corresponding revisions of BS 4371) and BS 4162). Specifications of the two types of cast iron are included. b) The revision improves the specification for locating registers of couplings,
11、 thereby facilitating certification procedures. c) The reference to BS 2494 is updated. d) The specification reference for stainless steel is updated. e) The newly adopted term for soil and waste pipes, i.e. discharge pipes, has been incorporated. f) The term “socketless” replaces the earlier term “
12、spigot/spigot”. g) An electrical continuity test is included. 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 does not of itself confer immunity fro
13、m legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 4, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendme
14、nt table on the inside front cover. 1) Under revision 2) In preparation Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 05:51:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6087:1990 BSI 04-19991 1 Scope This British Standard specifies design requirements and type tests for flexible joints
15、for grey and ductile cast iron pipes and fittings complying with the requirements of BS 437 and BS 416. Marking of assemblies is also specified. For the guidance of specifiers and purchasers, options are listed in Appendix C. NOTEThe titles of the publications referred to in this standard are listed
16、 on the inside back cover. 2 Definitions For the purposes of this British Standard the definitions given in BS 4118 apply, together with the following. 2.1 joint assembly two spigots or a socket and spigot and means of jointing them together, assembled into a single unit 3 Design 3.1 General Flexibl
17、e joints shall be designed so that joint assemblies comply with this standard when: a) formed with pipes, fittings, or pipes and fittings complying with BS 416; or b) formed with pipes, fittings or pipes and fittings complying with BS 437; or c) formed with pipes or fittings complying with BS 416 co
18、nnected to pipes or fittings complying with BS 437. 3.2 Locating register for couplings Couplings/gaskets shall incorporate an integral central circumferentially continuous locating register. In the assembled condition, the central register shall not protrude into the internal bore of the pipe but s
19、hall engage with the pipe thickness by a minimum depth of 3 mm. 3.3 Location of joints Joint assemblies with fittings complying with BS 416 or BS 437 shall be wholly within the straight portion of the fittings. 4 Materials 4.1 Elastomeric joint rings, if used, shall comply with the requirements of B
20、S 2494 for rings of type D (drainage). 4.2 Metallic components shall be of one of the following materials. a) Grey iron. For joints integral with pipes, grey iron complying with the tensile strength requirements of BS 1452, not less than grade 150. For loose couplings, i.e. not integral with pipes,
21、grey iron complying with the tensile strength requirements of BS 1452, not less than grade 180. In all cases the iron shall be coated in accordance with BS 437 or BS 416. b) Ductile iron. For joints integral with pipes, or for loose couplings, ductile iron complying with the tensile strength require
22、ments of BS 4772. In all cases the iron shall be coated in accordance with BS 437 or BS 416. c) Stainless steel. For nuts and bolts, stainless steel complying with the requirements of BS 6105, not less than grade A2-80. Steel for coupling bands and earth continuity clips complying with the requireme
23、nts of BS 1449-2, not less than grade 304S15. 5 Testing 5.1 General A joint assembly shall comply with 5.2, 5.3 and 5.4 when subjected to the leakage test given in A.2. 5.2 Straight draw When tested in accordance with A.3 the joint assembly shall not leak. 5.3 Deflection When tested in accordance wi
24、th A.4 and deflected to the angle shown in Table 1 the joint assembly shall not leak. 5.4 Shear resistance The joint assembly shall not leak when tested in accordance with A.5. 5.5 Electrical continuity test If provision is made for electrical continuity, when tested in accordance with Appendix B, t
25、he resistance of the electrical coupling shall not exceed 0.3 7. Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 05:51:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6087:1990 2 BSI 04-1999 6 Marking Each flexible joint shall be legibly and indelibly marked with the following information. a
26、) The number and year of this British Standard, i.e. BS 6087:19903). b) BS 437 (or letter “D” for drain) and/or BS 416 (or letter “S” for discharge and ventilating pipes) as appropriate to the suitability of the joint. c) The manufacturers name or identification mark. d) The nominal pipe size. e) “D
27、UCTILE” or “SG” for products made from ductile (spheroidal graphite) iron. NOTEProducts made from grey iron would be identified by not being so marked. f) “ST” for products made from stainless steel. 3) Marking BS 6087 on or in relation to a product represents a manufacturers declaration of conformi
28、ty, i.e. a claim by or on behalf of the manufacturer that the product meets the requirements of the standard. The accuracy of the claim is therefore solely the responsibility of the person making the claim. Such a declaration is not to be confused with third party certification of conformity, which
29、may also be desirable. Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 05:51:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6087:1990 BSI 04-19993 Appendix A Mechanical tests A.1 General The apparatus shall accommodate two pipes flexibly jointed and supported in such a way that they can mov
30、e in relation to each other to the limits required by the tests. A.2 Leakage test Fill the pipes with water and expel all air. Apply a hydrostatic pressure of 0.5 bar4) for 5 min, and then examine the assembly for leakage. A.3 Straight draw test Fully engage the pipes in the joint assembly. Align th
31、em axially with one pipe restrained from movement and the other pipe supported from the underside but otherwise free to move, as shown in Figure 1. For socketless joints separate the pipes axially by 5 mm on each side of the central register. For spigot/socket joints separate the pipes axially by 10
32、 mm. Prevent further longitudinal movement and apply the leakage test specified in A.2. A.4 Deflection test Fully engage the pipes in the joint assembly. Align them axially with one pipe restrained from movement and with the other pipe completely free to move. For socketless joints, separate the pip
33、es axially by 5 mm on each side of the central register. For spigot/socket joints, separate the pipes axially by 10 mm. Angularly deflect one pipe with respect to the other to the test requirement given in Table 1, with the fulcrum on the centre line of the pipes and within the joint. Prevent furthe
34、r longitudinal movement and apply the leakage test specified in A.2. Table 1 Angle of deflection A.5 Shear loading test Fully engage the pipes in the joint assembly. Align them axially with one pipe restrained from movement and the other pipe supported from the underside at a point near the end remo
35、te from the joint assembly but otherwise free to move, as shown in Figure 2. For socketless joints separate the pipes axially by 5 mm on each side of the central register or centre line. For spigot/socket joints separate the pipes axially by 10 mm. Prevent further longitudinal movement. Apply a shea
36、r load over 300 mm as shown in Figure 2 directly adjacent to the coupling or spigot/socket joint such that the resultant shear force across the coupling/joint, taking into account the mass of the pipe and contents, is equal to 0.025 kN DN. Apply the leakage test specified in A.2. If necessary, after
37、 5 min, adjust shear load to original value. Inspect for leakage. 4) 1 bar = 105 N/m2= 100 kPa Nominal sizeMinimum angle of deflection DNdegrees 50 to 150 200 to 300 3 2 Figure 1 Typical arrangement of straight draw test Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 05:51:19 GMT+00:00 2006,
38、 Uncontrolled Copy, (c) BSI BS 6087:1990 4 BSI 04-1999 Appendix B Electrical continuity test Assemble the pipe joint components on non-conducting supports and without restraint. Apply a steadily increasing voltage, not exceeding 50 V a.c., 50 Hz, across the junction until a steady current of 25 1 A
39、flows through the coupling. Allow the current to flow for 30 s, maintaining it as necessary by adjusting the voltage. Calculate the resistance of the coupling by dividing the observed voltage by the current. Appendix C Options for specifiers and purchasers The following options are available, and th
40、e selection should be clearly stated in any specification or order: a) grey iron, ductile iron or stainless steel; b) socketless or spigot/socket joints; c) for BS 416, BS 437 or BS 416/437 jointing; d) whether provision of earth continuity is required. NOTEThe typical arrangements apply equally to
41、flexible joints of the socketless type and the spigot/socket type. The figures are diagrammatic only and not meant to represent any particular joint designs. Figure 2 Typical arrangement of shear loading test Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 05:51:19 GMT+00:00 2006, Uncontrolle
42、d Copy, (c) BSI BS 6087:1990 BSI 04-1999 Publications referred to BS 416, Specification for cast iron spigot and socket soil, waste and ventilating pipes (sand cast and spun) and fittings. BS 437, Specification for cast iron spigot and socket drain pipes and fittings. BS 1449, Steel plate, sheet and
43、 strip. BS 1449-2, Specification for stainless and heat-resisting steel plate, sheet and strip. BS 1452, Specification for grey iron castings. BS 2494, Specification for elastomeric joint rings for pipework and pipelines. BS 4118, Glossary of sanitation terms. BS 4772, Specification for ductile iron
44、 pipes and fittings. BS 6105, Specification for corrosion-resistant stainless steel fasteners. Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 05:51:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6087:1990 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the
45、 independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure th
46、at they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible,
47、 the identity of which can be found on the inside front cover. Tel: 020 8996 9000. Fax: 020 8996 7400. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Buying standards Orders for all BSI, internation
48、al and foreign standards publications should be addressed to Customer Services. Tel: 020 8996 9001. Fax: 020 8996 7001. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise reques
49、ted. Information on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service. Various BSI electronic information services are also available which give details on all its products and services. Contact the Information Centre. Tel: 020 8996 7111. Fax: 020 8996 7048. Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and other benefits co
链接地址:https://www.31doc.com/p-3772887.html