1、BRITISH STANDARD BS 5173-103.6: 1990 Methods of test for Rubber and plastics hoses and hose assemblies Part 103: Physical tests Section 103.6 Determination of ignitability of liningBS5173-103.6:1990 This British Standard, having been prepared under the directionof the Rubber StandardsPolicy Committe
2、e, waspublished under the authorityof the Board of BSI andcomes into effect on 31 August 1990 BSI 07-1999 The following BSI references relate to the work on this standard: Committee reference RUM/9 Draft for comment 89/40508 DC ISBN 0 580 18703 9 Committees responsible for this British Standard The
3、preparation of this British Standard was entrusted by the Rubber Standards Policy Committee (RUM/-) to Technical Committee RUM/9, upon which the following bodies were represented: Association of Metropolitan Authorities British Coal Corporation British Compressed Gases Association British Gas plc Br
4、itish Rubber Manufacturers Association Chief and Assistant Chief Fire Officers Association Energy Industries Council Fire Extinguishing Trades Association Home Office Institution of Fire Engineers Liquefied Petroleum Gas Industry Technical Association (UK) London Fire and Civil Defence Authority Lon
5、don Regional Transport Malaysian Rubber Producers Research Association Ministry of Defence Society of Motor Manufacturers and Traders Limited The following bodies were also represented in the drafting of the standard, through subcommittees and panels: British Fluid Power Association Engineering Equi
6、pment and Materials Users Association Amendments issued since publication Amd. No. Date CommentsBS5173-103.6:1990 BSI 07-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Apparatus 1 3 Test piece 1 4 Procedure 1 5 Test report 1 Figure 1 Apparatus for ignitability
7、 test 2 Publication(s) referred to Inside back coverBS5173-103.6:1990 ii BSI 07-1999 Foreword This Section of BS5173, prepared under the direction of the Rubber Standards Policy Committee, is a revision of clause9 of BS5173-3:1977 which will be deleted by amendment. The remainder of the 1976 and 197
8、7 editions of BS5173 is to be revised and as each of the tests is revised it is intended to issue it as a separate Part or Section of BS5173, as described in BS5173-100. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsi
9、ble 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, pages 1 and 2, an inside back cover and a back cover. This standard has been
10、 updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS5173-103.6:1990 BSI 07-1999 1 1 Scope This Section of BS5173 describes a method of test which is primarily applicable to gas cutting and welding and simil
11、ar hoses to determine the ignitability of the lining. NOTE 1For the purpose of this test, ignition is the initiation of combustion, which is the destruction by oxidation with the production of heat, usually with incandescence or flame, or both. NOTE 2The titles of the publications referred to in thi
12、s standard are listed on the inside back page. 2 Apparatus 2.1 General. Apparatus required for this test is shown in Figure 1. The following are also required. 2.2 A 350 W heating furnace, the internal dimensions being150mm deep by50mm diameter. 2.3 A variable resistor with a screw movement or an au
13、to-transformer with continuously variable output voltage. 2.4 A calibrated flowmeter for oxygen suitable for the measurement of a flow of0L/min to5L/min at a temperature of15 C and at atmospheric pressure. 2.5 A nitrogen-filled mercury-in-glass thermometer suitable for use at150mm immersion, graduat
14、ed from approximately300Cto400 C in intervals of not more than5 C, the lowest scale line being not less than200mm above the bulb. 3 Test piece 3.1 Clean the sample of material for test by buffing. Remove all traces of reinforcement from the sample. 3.2 Cut three test pieces, from the same sample, in
15、to blocks of volume8mm 3to10mm 3 , the sides of each block being greater than1.3mm but less than2.5mm in length. 4 Procedure 4.1 Insert the ignition test apparatus, in its aluminium foil wrapping, into the electric furnace. Adjust the energy supply to the electric furnace with the variable resistor
16、or auto-transformer so that a constant temperature between360Cand365 C is maintained with the oxygen flowing at2 0.1L/min. 4.2 When the furnace is at constant temperature, remove the test piece holder and impale a test piece block of the material under test on the tungsten point. Replace the test pi
17、ece holder in the apparatus. NOTE 1It is necessary for this operation to be carried out quickly, so that cooling is reduced to a minimum. NOTE 2It is essential for the tungsten point to be kept clean and sharp. 4.3 Retain the test piece in the apparatus for a120 2s period and observe it carefully du
18、ring this period for evidence of ignition, characterized by a flash and occasionally a small explosion. NOTE 1Fumes may be observed but this does not constitute evidence of ignition. NOTE 2When ignition of a test piece occurs, the temperature of the apparatus may rise. It is then essential to allow
19、a lapse of time to permit the temperature to return to the appropriate testing temperature before any further test pieces are tested. 4.4 If more than one test piece ignites within the specified test period this shall be taken as evidence that the material fails the test. If only one test piece fail
20、s, prepare three further test pieces, taken from the same sample, and test them. Any failure in this second test shall be taken as evidence that the material fails the test. 5 Test report The test report shall include the following information. a) the statement: “THE TEST RESULTS RELATE ONLY TO THE
21、BEHAVIOUR OF THE TEST PIECES UNDER THE PARTICULAR CONDITIONS OF TEST: THEY SHALL NOT BE USED AS A MEANS OF ASSESSING THE POTENTIAL FIRE HAZARD OF THE HOSES IN USE”; b) the hose manufacturer; c) the hose type and nominal bore; d) the date of manufacture and batch number or reference, if known; e) the
22、 method of manufacture and details of reinforcement; f) the number and section of this British Standard, i.e.BS5173-103.6:1990; g) the test temperature; h) whether or not any of the three test pieces, or, if appropriate, any of the three further test pieces ignited within the specified test period.B
23、S5173-103.6:1990 2 BSI 07-1999 NOTE 1Aluminium foil is used to minimize radiant heat and to obtain a more uniform temperature distribution. NOTE 2Ground glass joints should comply with BS572. Figure 1 Apparatus for ignitability testBS5173-103.6:1990 BSI 07-1999 Publication(s) referred to BS 572, Spe
24、cification for interchangeable conical ground glass joints. BS 5173, Methods of test for rubber and plastics hoses and hose assemblies. BS 5173-3, General physical tests 1) . BS 5173-100, General introduction 1) . 1) Referred to in the foreword only.BS 5173-103.6: 1990 BSI 389 Chiswick High Road Lon
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