1、Specification for nonpercolating layflat delivery hoses and hose assemblies for fire fighting purposesBS 6391:2009raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI British StandardsBS 6391:2009 BritiSh StandardPublishing and copyright informationthe
2、 BSi copyright notice displayed in this document indicates when the document was last issued. BSi 2009 iSBn 978 0 580 58518 0iCS 13.220.10the following BSi references relate to the work on this standard: Committee reference FSh/17 draft for comment 08/30163116 dCPublication historyFirst published Oc
3、tober 1983Second (present) edition February 2009Amendments issued since publicationDate Text affected BritiSh Standard BSI 2009 iBS 6391:2009ContentsForeword ii1 Scope 12 normative references 13 terms and definitions 24 Classification 25 Construction 26 dimensions 37 Mass 38 type tests 49 Production
4、 test 610 hose assemblies 611 Marking 7Annexesannex a (informative) recommendations for pressure testing of hoses in service 8annex B (normative) Minimum frequency of testing 9annex C (normative) Method of test for dimensional stability 10annex d (normative) Method of test for leakage or damage in k
5、inked test piece under pressure 11annex E (normative) Method of test for adhesion 12annex F (normative) Method of test for moisture absorption 14annex G (normative) Method of test for hot surface resistance 15annex h (normative) Method of test for heat resistance 19annex i (normative) Method of test
6、 for abrasion resistance 20annex J (normative) Method of test for ozone resistance 22annex K (normative) Method of test for pressure loss 23annex L (normative) Method of test for security of couplings in hose assemblies 24Bibliography 25List of figuresFigure 1 a flaked hose 7Figure E.1 typical appar
7、atus for the adhesion test 13Figure G.1 detail of brass metal sleeve 15Figure G.2 Example of a suitable filament design 16Figure G.3 Point of contact of filament rod with hose (from above) 17Figure i.1 typical layout of apparatus for the abrasion resistance test 21List of tablestable 1 inside diamet
8、er 3table 2 Mass per unit length 3table 3 abrasion resistance 5table 4 Pressure loss 6table B.1 Minimum frequency of testing 9Summary of pagesthis document comprises a front cover, an inside front cover, pages i to ii, pages 1 to 26, an inside back cover and a back cover.BS 6391:2009ii BSI 2009Briti
9、Sh StandardForewordPublishing informationthis British Standard is published by BSi and came into effect on 2009. it was prepared by Subcommittee FSh/17/6, 28 February Hoses for fire service use, under the authority of technical Committee FSh/17, Fire brigade equipment. a list of organizations repres
10、ented on this committee can be obtained on request to its secretary.Supersessionthis British Standard supersedes BS 6391:1983, which is withdrawn.Information about this documentthis British Standard has been revised to bring it up to date. the test methods have been clarified and a method of test fo
11、r hot surface resistance (annex G) has been added.Presentational conventionsthe provisions of this standard are presented in roman (i.e. upright) type. its requirements are expressed in sentences in which the principal auxiliary verb is “shall”.Commentary, explanation and general informative materia
12、l is presented in smaller italic type, and does not constitute a normative element.Contractual and legal considerationsthis publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot
13、confer immunity from legal obligations.BritiSh Standard BSI 2009 1BS 6391:20091 Scopethis British Standard specifies requirements for types 1, 2 and 3 of nonpercolating layflat delivery hoses for fire fighting purposes, which are intended for use at working pressures not exceeding 15 bar, and at a m
14、inimum ambient temperature of 20 C. the hoses covered are suitable for use with fire hose couplings conforming to BS 336. additional requirements are specified for hose assemblies, which are hoses supplied with couplings conforming to BS 336 already fitted. NOTE 1 The working pressure of the hoses i
15、n service will not normally exceed 10 bar, but they can be used at pressures up to 15 bar, e.g. when connected to high rise mains. NOTE 2 1 bar = 105N/m2= 105Pa. All pressure values specified in this standard are gauge pressures.NOTE 3 BS EN 14540 specifies requirements for nonpercolating layflat ho
16、ses for fixed systems. Requirements for semirigid hoses are given in BS EN 1947 for pumps and vehicles and in BS EN 694 for fixed systems. annex a gives recommendations for the pressure testing of hoses in service. annex B specifies the minimum frequency of tests.2 Normative referencesthe following
17、referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.BS 336:2009, Specification for fire hose couplings and ancillary
18、 equipment (in preparation)BS 1052, Specification for mild steel wire for general engineering purposesBS 35582, Glossary of rubber terms Part 2: Additional British termsBS En iSO 1402, Rubber and plastics hoses and hose assemblies Hydrostatic testingBS En iSO 4671:2007, Rubber and plastics hoses and
19、 hose assemblies Methods of measurement of the dimensions of hoses and the lengths of hose assembliesBS En iSO 8330, Rubber and plastics hoses and hose assemblies VocabularyBS iSO 14311:2004, Rubber, vulcanized or thermoplastic Resistance to ozone cracking Part 1: Static and dynamic strain testingBS
20、 iSO 1817, Rubber, vulcanized Determination of the effect of liquids FEPa 4312006, Grains of fused aluminium oxide, silicon carbide and other abrasive materials for coated abrasives, Macrogrits P 12 to P 220, Paris: Fepa abrasives 1)1)available from www.fepaabrasives.orgBS 6391:20092 BSI 2009BritiSh
21、 Standard3 Terms and definitions For the purposes of this British Standard, the terms and definitions given in BS 35582 and BS En iSO 8330 and the following apply. 3.1 flaked hoselayflat hose folded backwards and forwards on itself in a series of folds of equal lengthNOTE See Figure 1.3.2 flakeone f
22、old of a flaked hose4 Classification4.1 Type 1 (Uncoated)hoses to which no external treatment has been applied to the reinforcement and are therefore liable to absorb liquids.NOTE These need to be thoroughly dried after use.4.2 Type 2 (Coated) hoses to which an external elastomeric coating has been
23、applied to the reinforcement to give some protection against the absorption of liquids, and to improve resistance to abrasion of the reinforcement. 4.3 Type 3 (Covered or coated)hoses to which an external elastomeric coating or covering has been applied. Covering can alternatively be incorporated in
24、 the reinforcement to give the hoses very low absorption of liquids and high resistance to abrasion and heat. 5 Construction all hose types shall comprise the following: an impermeable internal elastomeric lining; a) NOTE The inner surface of the lining should be as smooth as possible so as to minim
25、ize friction.a circular woven seamless reinforcement; b) NOTE The reinforcement is often referred to as the “jacket”.additionally, for types 2 and 3, an externally applied elastomeric c) coating or covering of the reinforcement; type 3 hoses can incorporate the coating in the reinforcement.NOTE The
26、construction of the hoses should be such that it is possible to repair a damaged hose so that it will pass the pressure test recommended in Annex A. BritiSh Standard BSI 2009 3BS 6391:20096 Dimensions NOTE Recommended nominal lengths of hoses are 15 m, 18 m, 25 m, 30 m and 36 m. the total length of
27、hose supplied shall be in accordance with the purchasers requirements. tolerance on length shall be 002+%.When measured in accordance with BS En iSO 4671:2007, 4.2, the inside diameter (bore) of the hose shall conform to the requirements of table 1.table 1 Inside diameterID (bore) Equivalent sizes i
28、n BS 336 Minimum bore Maximum borein mm mm mm38 1.5 38 38.1 39.7 45 1.75 45 44.5 46.1 51 2 51 50.8 52.4 64 2.5 64 63.5 65.1 70 2.75 70 69.9 71.5 76 3 76 76.2 77.8 89 3.5 89 88.9 90.5 NOTE The values for minimum bore correspond to the values specified for the minimum external diameter of couplings in
29、 BS 336. 7 Mass When a length of hose at least 2 m long, without couplings attached, is measured in accordance with BS En iSO 4671 and then weighed, the mass per unit length shall not exceed the appropriate value given in table 2.table 2 Mass per unit lengthID (bore)mm Maximum mass per unit lengthkg
30、/m 38 0.3245 0.3751 0.4964 0.6270 0.6876 0.7989 0.93BS 6391:20094 BSI 2009BritiSh Standard8 Type tests 8.1 Hydrostatic tests 8.1.1 Dimensional stabilityWhen the hose is tested in accordance with annex C:the length contraction of the hose when the pressure is first a) increased to 0.7 bar shall not e
31、xceed 1% of the reference length of the unpressurized test piece; the increase in length, when the pressure is increased from 0.7 bar b) to 12 bar, shall not exceed 5% of the length measured originally at 0.7 bar, and the increase in outside diameter shall not exceed 10% of the original diameter;the
32、 residual increase in length, determined when the pressure is c) returned to 0.7 bar, shall not exceed 1% of the length measured originally at 0.7 bar. 8.1.2 Kinked test piece under pressureWhen tested in accordance with annex d, the test piece shall neither burst nor show any visible signs of defec
33、t. 8.1.3 Burst pressureWhen tested in accordance with BS En iSO 1402, the average value of the burst pressure for five test pieces shall be not less than 45 bar and no individual result shall be less than 43 bar for hoses up to and including 76 mm. For 89 mm diameter test pieces, the average burst p
34、ressure shall be not less than 35 bar and no individual result shall be less than 33 bar. 8.2 AdhesionWhen tested in accordance with annex E, the rate of separation of the lining and reinforcement and, for type 3 hoses, the rate of separation of the cover and reinforcement, shall not exceed 25 mm/mi
35、n. 8.3 Moisture absorption (types 2 and 3 only) When tested in accordance with annex F, the amount of moisture absorbed shall not exceed 0.17 kg/m2for type 2 hoses and 0.02 kg/m2for type 3 hoses. NOTE The resistance of fire hoses to acids and alkalis has been found to relate to their resistance to m
36、oisture absorption, thus type 3 hoses can be expected to have the greatest resistance to acids and alkalis. 8.4 Flexibility 8.4.1 at a temperature greater than 5 C, the hose shall be capable of being laid in flakes (see Figure 1) of 2 m length and coiled into a smooth roll without any straight secti
37、ons. 8.4.2 after conditioning at 20 C 1 C for 24 h 1 h, a dry, rolled length of not less than 15 m of hose shall be capable of being unrolled immediately. after the hose has been unrolled and immediately BritiSh Standard BSI 2009 5BS 6391:2009folded back on itself through 180, it shall withstand, wi
38、thout any sign of leakage, a proof pressure of 22.5 bar maintained for 1 min, in accordance with BS En iSO 1402.8.5 Heat ageing8.5.1 Six 1 m lengths of hose shall be conditioned for 120 h at 20 C 2 C and 65% 2% relative humidity, and then aged for 336 h at 70 C 2 C. after ageing, there shall be no t
39、ackiness of the surface of the lining or, for type 3 hoses, of the surface of the cover. 8.5.2 Five of the 1 m lengths of hose aged in 8.5.1 shall then be subjected to a burst pressure test in accordance with BS En iSO 1402. the average value of the burst pressure for five test pieces shall be not l
40、ess than 35 bar and no individual result shall be less than 33 bar. 8.5.3 the remaining 1 m length of hose aged in 8.5.1 shall be tested in accordance with annex E. the rate of separation of the lining and reinforcement and, for type 3 hoses, the rate of separation of the cover and reinforcement, sh
41、all not exceed 25 mm/min. 8.6 Hot surface resistanceWhen tested in accordance with annex G, at a test temperature of 300 C 10 C for types 1 and 2, and 400 C 10 C for type 3, in none of the four tests shall the test piece show signs of leakage within 120 s from the application of the filament rod or
42、on removal of this filament rod after the specified period.8.7 Heat resistance (for type 3 only)When tested in accordance with annex h, none of the test pieces shall leak or burst within 15 s of the application of the hot cube. 8.8 Abrasion resistanceWhen tested in accordance with annex i, the avera
43、ge number of cycles completed before bursting for five test pieces shall be not less than the appropriate value specified in table 3. table 3 Abrasion resistanceBore size Minimum number of cyclesType 1 hose Type 2 hose Type 3 hoseG 51 mm 35 55 65 64 mm/70 mm 45 65 90 76 mm/89 mm 55 75 100 8.9 Oil re
44、sistance (for type 3 only) a 1 m length of hose shall be immersed in oil number 3, as specified in BS iSO 1817, with its ends maintained above the surface of the oil, at 50 C 2 C for 7002+h.test pieces taken from the central (fully immersed) portion of the hose shall then be subjected to an adhesion
45、 test in accordance with annex E. the rate of separation of the cover and reinforcement shall not exceed 25 mm/min. BS 6391:20096 BSI 2009BritiSh Standard8.10 Ozone resistance When tested in accordance with annex J, the lining and, for type 3 hoses, the cover, shall exhibit no cracking or crazing vi
46、sible under 2 magnification, except at the cut edges of the hose. 8.11 Pressure lossWhen tested in accordance with annex K, the pressure loss per 23 m length shall not exceed the values specified in table 4 at the specified flow rate and inlet pressure.table 4 Pressure lossBoremm Inlet pressurebar F
47、low rateL/min Max. pressure loss/23 mbar 38 7 180 0.7545 7 225 0.6051 7 225 0.4064 7 450 0.5070 7 450 0.4076 7 750 0.6089 7 750 0.409 Production test Each length of hose shall, when subjected to a proof pressure of 22.5 bar maintained for 1 min, in accordance with BS En iSO 1402, show no sign of lea
48、kage or any other defect. 10 Hose assemblies 10.1 Generalhose assemblies shall conform to Clause 6, Clause 7, Clause 8 and Clause 9 and the additional requirements in 10.2, 10.3 and 10.4. 10.2 Couplingshose assemblies shall be fitted with delivery hose couplings conforming to BS 336:2009, Clause 8.t
49、he couplings shall be tied in by binding (“bound in”) with galvanized mild steel wire of diameter 1.6 mm, conforming to BS 1052, and applied over a hose guard of synthetic fibre to protect the hose from the wire. Multiserrated type couplings shall be secured by 20 continuous turns of wire and ribbed type couplings shall be secured by ties of at least eight continuous turns on both sides of the rib. the ends of the wire shall be secured by twisting them together and embedding them in
