BS-ISO-13774-1998.pdf

BRITISH STANDARD BS ISO 13774:1998 Rubber and plastics hoses for fuels for internal combustion engines Method of test for flammability ICS 13.220.40; 23.040.70 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 03:58:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 13774:1998 This British Standard, having been prepared under the direction of the Sector Committee for Materials and Chemicals, was published under the authority of the Standards Committee and comes into effect on 15 October 1999 © BSI 04-2000 ISBN 0 580 35326 5 National foreword This British Standard reproduces verbatim ISO 13774:1998 and implements it as the UK national standard. The UK participation in its preparation was entrusted by Technical 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 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 British Standards which implement international 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 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, pages i and ii, the ISO title page, pages ii to iv, pages 1 to 3 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.DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 03:58:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 13774:1998 © BSI 04-2000i Contents Page National forewordInside front cover Forewordiii Text of ISO 137741 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 03:58:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 03:58:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 03:58:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 13774:1998 ii © BSI 04-2000 Contents Page Forewordiii 1Scope1 2Normative reference1 3Principle1 4Apparatus and materials1 5Test pieces1 6Conditioning of test pieces1 7Procedure1 8Test report3 Figure 1 Test apparatus2 Descriptors: Rubber products, plastics products, hoses, fluid circuits, automotive fuels, rubber hoses, plastics hoses, tests, flammability testing. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 03:58:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 13774:1998 © BSI 04-2000iii Foreword ISO (the International Organization for Standardization) is a 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 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 adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 13774 was prepared by Technical Committee ISO/TC 45, Rubber and rubber products, Subcommittee SC 1, Hoses (rubber and plastics). Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 03:58:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 03:58:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 13774:1998 © BSI 04-20001 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 responsibility 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 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 of 16 or smaller, intended for use with petroleum fuels for internal-combustion engines. NOTEThe method of test for flammability of other types of rubber and plastics hoses is given in ISO 8030:1995, Rubber and plastics hoses Method of test for flammability. 2 Normative reference The following standard contains provisions which, through reference in this text, constitute 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 the standard indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 471:1995, 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 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 ISO 471). 4.2 Steel stands, for supporting the test piece in a horizontal position above the fuel tray (see Figure 1). 4.3 Glass tube, for supplying the test piece with fuel at a certain pressure (fuel level 900 mm above the test piece). 4.4 Fuel tray, of square shape, 350 mm × 350 mm, with vertical, 40-mm-high sides. 4.5 Fuel, consisting of commercial heptane with a distillation range of 80 °C to 110 °C. 5 Test pieces Hose assemblies with a length of 400 mm (see Figure 1) shall be used. At least three test pieces shall be tested. 6 Conditioning of test pieces No test shall be carried out within 24 h of manufacture. Test pieces shall be conditioned at standard temperature and humidity (see ISO 471) for at least 3 h before testing. This may be part of the 24 h 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 equipment. 7.1 Preparations Arrange the test equipment to conform to Figure 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 the 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 hose. Adjust the fuel level to 900 mm above the test piece. Pour 0,5 dm3 of water and 2 dm3 of 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. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 03:58:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 13774:1998 2 © BSI 04-2000 Allow the heptane to burn and record the time 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 extent during more than 25 % of the duration of the test, or if the time to leakage in any test deviates by more than 30 s 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 the water and fuel. Figure 1 Test apparatus Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 03:58:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 13774:1998 © BSI 04-20003 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 observations 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. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 03:58:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 13774:1998 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the 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. 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