1、BRITISH STANDARD BS5173-102.3: 1988 Methods of test for rubber and plastics hoses and hose assemblies Part102: Hydraulic pressure tests Section102.3 Determination of volumetric expansion of fuel-dispensing pump hoses UDC 621.643.33036:620.1BS5173-102.3:1988 This British Standard, having been prepare
2、d under the directionof the Rubber StandardsCommittee, waspublished under the authorityofthe Board of BSIandcomes intoeffect on 30 November 1988 BSI 07-1999 The following BSI references relate to the work on this standard: Committee reference RUM/9 Draft for comment 87/35431 DC ISBN 0 580 16980 4 Co
3、mmittees responsible for this British Standard The preparation of this British Standard was entrusted by the Rubber Standards Committee (RUM/-) to Technical Committee RUM/9, upon which the following bodies were represented: Association of Metropolitan Authorities British Coal Corporation British Com
4、pressed Gases Association British Fluid Power Association British Gas plc British Railways Board British Rubber Manufacturers Association Chief and Assistant Chief Fire Officers Association Department of the Environment (Property Services Agency) Fire Extinguishing Trades Association Health and Safe
5、ty Executive Home Office Institution of Fire Engineers Institution of Production Engineers Liquefied Petroleum Gas Industry Technical Association (UK) London Regional Transport Malaysian Rubber Producers Research Association Ministry of Defence Society of Motor Manufacturers and Traders Limited Wate
6、r Authorities Association Amendments issued since publication Amd. No. Date of issue CommentsBS5173-102.3:1988 BSI 07-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Apparatus 1 3 Test pieces 1 4 Procedure 1 5 Expression of results 1 6 Test report 1 Figure 1 Sc
7、hematic arrangement of test apparatus 2 Publications referred to Inside back coverBS5173-102.3:1988 ii BSI 07-1999 Foreword This Section of BS5173, prepared under the direction of the Rubber Standards Committee, is a revision of clause5 of BS5173-2:1976, which is to be withdrawn by amendment. The re
8、mainder of the 1976 edition 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. Fuel-dispensing pump hoses are required to dispense specific volumes of fluids. The volumetric capacity of the hose is perm
9、itted to vary by only small amounts at the dispensing pressure. This Section of BS5173 describes methods for checking that such requirements can be met. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their cor
10、rect 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, pages1 and 2, an inside back cover and a back cover. This standard has been updated (see copyri
11、ght date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS5173-102.3:1988 BSI 07-1999 1 1 Scope This Section of BS5173 describes two methods of measuring the volumetric expansion of a hose assembly at a specified pressure, in one th
12、e hose is twisted axially and in the other it is not. The tests are applicable to fuel-dispensing pump hoses only. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 2 Apparatus 2.1 The apparatus, shown in Figure 1, shall comprise a source of fluid,
13、in this case water, which can be maintained by air pressure at the required pressure, together with a pressure gauge, piping, valves and fittings, so that a horizontal hose assembly can be subjected to hydraulic pressure, the volume of fluid corresponding to the volumetric expansion of the hose unde
14、r pressure being measured in a graduated tube. 2.2 The bore of all piping connections shall be smooth without recesses or off-sets, so that all air may be freely removed from the system before carrying out each test. The valves shall be of such a design as to open and close with minimum displacement
15、 of the fluid. The apparatus shall be capable of increasing the pressure in the test piece in accordance with BS5173-102.1. The rate of increase in pressure shall be between0.075MPa/s and0.175MPa/s for test pressures up to12.5MPa. 3 Test pieces For either method, two test assemblies each of length3.
16、6m shall be tested. 4 Procedure 4.1 General Whether or not the hose is twisted axially, carefully connect the test assembly in position on the apparatus in such a way that a leakproof seal is obtained, taking care to avoid twisting the assembly. Use the test pressure specified in the product standar
17、d. Unless otherwise specified, all tests shall be carried out at the standard temperature specified in BS903-A35. 4.2 Test without axial twisting (see Figure 1) 4.2.1 With valves A and E closed, position valve B so as to connect the pressure gauge, air vessel and gauge glass tube to the atmosphere.
18、4.2.2 Open valves C and D to flush the hose assembly with water and remove all of the air. 4.2.3 Close valve D and open valve A to bring the water level in the gauge glass tube to the datum mark. Then close valve C and check that the water level remains at the datum mark. 4.2.4 Position valve B so a
19、s to close the air exhaust and connect the air supply through to the gauge glass tube. 4.2.5 Open valve E and adjust the air pressure reducing valve to supply a constant air pressure at the test pressure to the gauge glass tube. Record the water level reading in the gauge glass tube. 4.2.6 Reduce th
20、e air pressure to0.02MPa and again record the water level reading in the gauge glass tube. 4.3 Test with axial twisting 4.3.1 Carry out the procedure described in4.2.1 to4.2.5. 4.3.2 After the air pressure has been raised to the test pressure, twist the hose axially through360 in both the clockwise
21、and counterclockwise directions, and record the maximum reading of the water level. 4.3.3 Reduce the air pressure to0.02MPa, twist the hose axially through360 in both the clockwise and counter-clockwise directions, and again record the maximum water level reading. 5 Expression of results Calculate t
22、he volumetric expansion by subtracting the reading obtained at0.02MPa from that obtained at the test pressure. Determine the mean expansion of the two hose assemblies. Take the test results to be invalid if the individual values differ from the mean by more than25% of the mean. 6 Test report The tes
23、t report shall include the following information: a) a reference to this Section of BS5173; b) a full description of the hose and its origin; c) the method of manufacture and details of reinforcement; d) the nominal bore; e) the mean volumetric expansion and the individual results; f) whether the te
24、st was performed with or without axial twisting.BS5173-102.3:1988 2 BSI 07-1999 Figure 1 Schematic arrangement of test apparatusBS5173-102.3:1988 BSI 07-1999 Publications referred to BS903, Methods of testing vulcanized rubber. BS903-A35, Temperatures, humidities and times for conditioning and testi
25、ng of test pieces. BS5173, Methods of test for rubber and plastics hoses and hose assemblies. BS5173-2, Hydraulic pressure tests 1) . BS5173-100, General introduction 1) . BS5173-102.1, Hydrostatic tests. 1) Referred to in the foreword only.BS5173-102.3: 1988 BSI 389 Chiswick High Road London W4 4AL
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