1、BRITISH STANDARD BS ISO 13774:1998 Rubber and plastics hoses for fuels for internal combustion engines Methodoftest for flammability ICS 13.220.40; 23.040.70BSISO13774:1998 This BritishStandard, having been prepared under the directionof the Sector Committeefor Materials and Chemicals, was published
2、 underthe authority of the Standards Committee and comesinto effect on 15October1999 BSI 04-2000 ISBN 0 580 35326 5 National foreword This BritishStandard reproduces verbatim ISO13774:1998 and implements it as the UK national standard. The UK participation in its preparation was entrusted by Technic
3、al Committee PRI/66, Rubber and plastics tubing, hoses and hose assemblies, to Subcommittee PRI/66/4, Methods of test, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals
4、for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The BritishStandards which implement internationa
5、l or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all
6、 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 from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii
7、, theISO title page, pages ii to iv, pages1 to3 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSISO1377
8、4:1998 BSI 04-2000 i Contents Page National foreword Inside front cover Foreword iii Text of ISO13774 1ii blankBSISO13774:1998 ii BSI 04-2000 Contents Page Foreword iii 1 Scope 1 2 Normative reference 1 3 Principle 1 4 Apparatus and materials 1 5 Test pieces 1 6 Conditioning of test pieces 1 7 Proce
9、dure 1 8 Test report 3 Figure 1 Test apparatus 2 Descriptors: Rubber products, plastics products, hoses, fluid circuits, automotive fuels, rubber hoses, plastics hoses, tests, flammability testing.BSISO13774:1998 BSI 04-2000 iii Foreword ISO (the International Organization for Standardization) is a
10、worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented
11、 on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards ado
12、pted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least75% of the member bodies casting a vote. International Standard ISO13774 was prepared by Technical Committee ISO/TC45, Rubber and rubber products, Su
13、bcommittee SC1, Hoses (rubber and plastics).iv blankBSISO13774:1998 BSI 04-2000 1 WARNING Persons using this International Standard should be familiar with normal laboratory practice. This standard does not purport to address all of the safety problems, if any, associated with its use. It is the res
14、ponsibility of the user to establish appropriate safety and health practices and to ensure compliance with any national regulatory conditions. Attention is drawn to the need for ensuring that the test specified in this International Standard is carried out under suitable environmental conditions and
15、 that personnel are adequately protected against risk of fire and inhalation of smoke and/or toxic products of combustion. 1 Scope This International Standard specifies a method for assessing the flammability of hoses with a nominal bore of16 or smaller, intended for use with petroleum fuels for int
16、ernal-combustion engines. NOTEThe method of test for flammability of other types of rubber and plastics hoses is given in ISO8030:1995, Rubber and plastics hoses Method of test for flammability. 2 Normative reference The following standard contains provisions which, through reference in this text, c
17、onstitute provisions of this International Standard. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of
18、 the standard indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO471:1995, Rubber Temperatures, humidities and times for conditioning and testing. 3 Principle The hose, filled with heptane, is subjected to fire. No leakage may occur earlier than
19、 T min after ignition of the fuel in the tray. The time T is specified in the appropriate product standard. 4 Apparatus and materials 4.1 Draught-free room, maintained at a standard temperature (see ISO471). 4.2 Steel stands, for supporting the test piece in a horizontal position above the fuel tray
20、 (seeFigure 1). 4.3 Glass tube, for supplying the test piece with fuel at a certain pressure (fuel level900mm above the test piece). 4.4 Fuel tray, of square shape,350mm 350mm, with vertical,40-mm-high sides. 4.5 Fuel, consisting of commercial heptane with a distillation range of80 C to110 C. 5 Test
21、 pieces Hose assemblies with a length of400mm (seeFigure 1) shall be used. At least three test pieces shall be tested. 6 Conditioning of test pieces No test shall be carried out within24h of manufacture. Test pieces shall be conditioned at standard temperature and humidity (see ISO471) for at least3
22、h before testing. This may be part of the24h period after manufacture. 7 Procedure WARNING Large flames and burning waste fluid could occur during any leakage. Therefore the test shall be performed in a non-combustible environment by personnel equipped with protective equipment and fire-fighting equ
23、ipment. 7.1 Preparations Arrange the test equipment to conform toFigure 1 without mounting any test piece. Fill the fuel tray as stated below, ignite the fuel and note that a stable flame is obtained. Non-measurable draught effects in the room could influence the flame and, if so, the position of th
24、e fuel tray shall be changed, in order to embrace the hose and one of its ends in the flame. Extinguish the flames and allow the whole apparatus to cool to ambient temperature. 7.2 Test Mount a test piece in place and fill it with fuel by opening the fuel valve. Ensure that no air is left in the hos
25、e. Adjust the fuel level to900mm above the test piece. Pour0,5 dm 3of water and2 dm 3of heptane into the fuel tray and ignite the heptane. The fuel tray shall be placed so that two of the sides are parallel with the test piece.BSISO13774:1998 2 BSI 04-2000 Allow the heptane to burn and record the ti
26、me to leakage. Leakage will be evident by the increase in the intensity of the fire at the position of leakage. The test is terminated when leakage occurs or when the heptane in the fuel tray is burnt off. If the flame is very unstable during the test and does not expose the test piece to a full ext
27、ent during more than25% of the duration of the test, or if the time to leakage in any test deviates by more than30s from the mean value determined, test another two test pieces. After each test, cool the fuel lines and fuel tray to ambient temperature before mounting a new test piece and replacing t
28、he water and fuel. Figure 1 Test apparatusBSISO13774:1998 BSI 04-2000 3 8 Test report The test report shall include the following particulars: a) a reference to this International Standard; b) a full description of the hose tested; c) the test conditions, e.g.the temperature in the room and observat
29、ions concerning any draught; d) the time to leakage for each test piece and the mean value; e) if no leakage occurs, the time the hose was exposed to fire; f) the date of the test.BS ISO 13774:1998 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent nationa
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