1、BRITISH STANDARD CONFIRMED DECEMBER1986 BS5842:1980 Specification for Thermoplastic hose assemblies for dock, road and tanker use UDC662.75:621.643.33.06:678.5:629.1/.4BS5842:1980 This British Standard, having been prepared under the directionof the Chemical andPetroleum Engineering Standards Commit
2、tee, was published under the authority ofthe Executive Board and comesinto effect on 29August1980 BSI 04-1999 The following BSI references relate to the work on this standard: Committee reference CPE/5 Draft for comment79/70223DC ISBN 0 580 11429 5 Cooperating organizations The Chemical and Petroleu
3、m Engineering Standards Committee, under whose direction this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations Association of Consulting Engineers British Chemical Engineering Contractors Association Brit
4、ish Gas Corporation British Rubber Manufacturers Association* British Steel Industry Cbmpe* Chemical Industries Association Coke Oven Managers Association Department of Energy Department of Industry Department of Trade (Marine Division) Engineering Equipment Users Association Glass Manufacturers Fed
5、eration Health and Safety Executive The 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 British Standard: British Association of Synthetic Rubber Manufacturers Ministry of Defence
6、Petrol Pump Manufacturers Association Individual experts Institution of Chemical Engineers Institution of Gas Engineers Institution of Structural Engineers Oil Companies Materials Association* Process Plant Association Amendments issued since publication Amd. No. Date of issue CommentsBS5842:1980 BS
7、I 04-1999 i Contents Page Cooperating organizations Inside front cover Foreword ii 1 Scope 1 2 References 1 3 Design 1 4 Manufacture 2 5 Prototype test 2 6 Performance requirements 2 7 Marking and identification 2 Appendix A Chemical resistance test 3 Table 1 Nominal sizes and bend radii of hose ass
8、emblies 1 Publications referred to Inside back coverBS5842:1980 ii BSI 04-1999 Foreword This British Standard has been prepared under the direction of the Chemical and Petroleum Engineering Standards Committee in order to lay down the requirements for the design, manufacture, performance, testing an
9、d marking of hoses made from thermoplastic materials such as polypropylene. 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 confe
10、r immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1 to4, 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
11、 the amendment table on theinside front cover.BS5842:1980 BSI 04-1999 1 1 Scope This British Standard specifies the requirements for the design, construction and testing of mandrel-built rough bore thermoplastic hose assemblies suitable for hydrocarbon products and aromatic hydrocarbons. 2 Reference
12、s The titles of the publications referred to in this standard are listed on the inside back cover. 3 Design 3.1 General. The assemblies shall be suitable for a working pressure of10bar 1)and a burst pressure of not less than40bar, throughout the temperature range 20C to80C. 3.2 Chemical resistance.
13、The wall of the hose shall be constructed throughout of material resistant to hydrocarbon products and aromatic hydrocarbons. The terminations shall be of material suitable for the specific requirements of the purchaser. 3.3 Construction. The assembly shall consist of the following. a) An inner spir
14、al of wire which shall be evenly pitched and tightly wound on to a mandrel. The wire may be of stainless steel or carbon steel, as agreed between the purchaser and the manufacturer. Where carbon steel is used it shall be galvanized or otherwise sheathed in material resistant to hydrocarbon products
15、and aromatic hydrocarbons. b) A multi-ply wall of thermoplastic films and reinforcing fabrics in suitable proportions to give the required physical properties. The film content may be built up of tubular films but shall in any case provide a complete seal. The wall shall be designed to minimize twis
16、ting under pressure. c) An outer cover resistant to abrasion and weathering. d) A spiral outer armouring wire, of stainless steel or galvanized carbon steel, which shall be mid-pitch to the inner wire and tensioned into position. e) Factory-fitted terminations which shall be secured in the hose by s
17、waging, whipping or bolt clips. Additional reinforcement shall be built into each end and shall extend for a distance of at least1m into all hose of100mm size and above. Both spiral wires shall be taken out and electrically bonded to the end fittings, unless otherwise specified by the purchaser. 3.4
18、 Materials 3.4.1 Wire. Stainless steel wire shall comply with the requirements of BS1554, Grade En58J(17Cr10Ni3Mo) in the drawn condition. Carbon steel wire shall have a tensile strength of650N/mm 2to850N/mm 2and comply with the requirements of BS3592-1 or BS3592-2. Carbon steel wire for external ar
19、mour shall be galvanized. All wire shall be free from defects likely to puncture the fabrics. If the inner wire is made of carbon steel it shall be galvanized or sheathed in thermoplastic or other material as agreed between the purchaser and the manufacturer and the sheath shall be free from perfora
20、tions and impurities. 3.4.2 Hose wall. The hose wall shall be of polypropylene, or other thermoplastic material, as agreed between the purchaser and the manufacturer, in the form of a flat film, extruded tube or fabric, all of which shall be free from tears and perforations that would affect the qua
21、lity of the finished hose. 3.5 Dimensions. The hose assemblies shall be supplied in the nominal sizes listed in Table 1. Table 1 Nominal sizes and bend radii of hose assemblies The length of hose ordered shall be the overall length used, including end connections. The tolerance on this length shall
22、be 2%,1%. 3.6 End connections. The type of end connections shall be as specified by the purchaser. 1) 1bar =10 5N/m 2=100kPa. Nominal size Min. bend radius mm mm 25 100 40 140 50 180 65 200 75 280 100 400 150 500 200 740 250 920BS5842:1980 2 BSI 04-1999 3.6.1 For all types of end connections the tai
23、l shall be specially designed to have a scroll or protrusion on the surface which will engage the inner wire of the hose. NOTEFor hoses of75mm bore and below, hose tails complying with the requirements of BS2464may be used, provided that agreement be reached between the purchaser and the manufacture
24、r. 3.6.2 Before securing the tail, the cut end of the hose shall be sealed with epoxy resin or other suitable sealant. 4 Manufacture Manufacture shall be carried out in clean conditions to avoid the inclusion of foreign bodies that may damage the wall of the hose. 5 Prototype test 5.1 Hydrostatic te
25、st 5.1.1 General. The manufacturer shall carry out the test procedure detailed in5.1.2 on each new prototype hose assembly. The test results, including the burst pressure, shall be stated on the certificate. A copy of the certificate shall be supplied to the purchaser, if required. 5.1.2 Procedure.
26、The procedure stated below shall be followed. a) The appropriate hydrostatic proof pressure test shall be carried out as described in6.4. b) The hose assembly shall be bent to the appropriate radius specified in Table 1. Whilst in the bent position, the pressure test specified in a) shall be repeate
27、d. c) The hose assembly shall then be released from the bent position and a hydrostatic pressure, equal to four times the design working pressure shall be applied. d) This pressure shall be attained over a period of15min and then maintained for a further period of15min without failure of any kind. e
28、) The pressure shall then be raised until the hose assembly fails and the pressure at which it fails shall be recorded. 5.2 Chemical resistance test. After being subjected to the resistance test described in Appendix A, the ratio of burst pressure to design working pressure shall not fall below4:1.
29、6 Performance requirements 6.1 Bend radius. Each assembly shall be capable of being bent, at working pressure, to the radii shown inTable 1, without resultant damage. The bend radius is measured to the surface of the hose inside the bend. 6.2 Electrical continuity. The electrical resistance of each
30、assembly, measured from end fitting to end fitting, shall not exceed107 and this value shall be maintained during and after proof pressure tests. The electrical continuity shall be established in accordance with the methods given in clause5 of BS5173-4:1977. 6.3 Vacuum test. Each assembly shall be c
31、apable of withstanding a vacuum of0.9bar gauge for30min without resultant damage when tested in accordance with clause5 of BS5173-3:1977. 6.4 Pressure requirements. When tested as described in4.4 of BS5173-2:1977, except that the rate of increase of pressure shall be not less than1.7bar/m, each asse
32、mbly shall comply with the following requirements: a) proof pressure:15bar; b) maximum elongation at proof pressure:12%. 7 Marking and identification Hose assemblies shall carry the following information: a) the number of this British Standard, i.e.BS5842 2) ; b) the manufacturers name or trade mark
33、 and type number; c) the hose serial number; d) the month and year of manufacture (e.g.6/1980); e) nominal bore; f) test pressure. NOTE 1This information may be stamped on the termination or printed on an attached metal tag. NOTE 2Hose may be identified by a coloured cover or other marking, as agree
34、d between the purchaser and the manufacturer. 2) Marking BS5842 on or in relation to a product is a claim by the manufacturer that the product has been manufactured in accordance with the requirements of the standard. The accuracy of such a claim is therefore the manufacturers sole responsibility. E
35、nquiries as to the availability of third party certification to support such claims should be addressed to the Director, British Standards Institution, Maylands Avenue, Hemel Hempstead, Herts HP24SQ in the case of certification marks administered by BSI or to the appropriate authority for other cert
36、ification marks.BS5842:1980 BSI 04-1999 3 Appendix A Chemical resistance test The procedure stated below should be followed. a) Prepare two assemblies of minimum length1m. b) Form the samples into a “U” bend and fill the hose with commercially pure toluene. c) Seal the assemblies and maintain at roo
37、m temperature for a minimum time of7days. d) Remove the test fluid and flush out the hose with water. e) Subject the assemblies to a burst pressure test as specified in BS5173-2. NOTEAttention is drawn to the Health and Safety at Work etc. Act1974 and to the need for ensuring that these tests are ca
38、rried out under suitable environmental conditions and that personnel are adequately protected.4 blankBS5842:1980 BSI 04-1999 Publications referred to BS1554, Rust, acid and heat resisting steel wire. BS2464, Hose couplings for petrol, oil and lubricants ( in to4 in nominal size). BS3592, Steel wire
39、for rubber hose reinforcement. BS3592-1, Coated round and flat mild steel wire. BS3592-2, Coated patented steel wire. BS5173, Methods of test for hoses. BS5173-2, Hydraulic pressure tests. BS5173-3, General physical tests. BS5173-4, Electrical tests. BS5842:1980 BSI 389 Chiswick High Road London W4
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