1、BRITISH STANDARD BS 5173-102.8: 1987 Methods of test for rubber and plastics hoses and hose assemblies Part 102: Hydraulic pressure tests Section 102.8 Pressure impulse test for rigid helix reinforced thermoplastics hoses UDC 621.643.33-036:620.1BS5173-102.8:1987 This British Standard, having been p
2、repared under the directionof the Rubber StandardsCommittee, was published under the authority ofthe Board of BSI and comes intoeffect on 30 April 1987 BSI 07-1999 First published in BS 5173-2, April1976 First revision as BS 5173-102.8, April 1987 The following BSI references relate to the work on t
3、his standard: Committee reference RUM/9 Draft for comment 86/37741 DC ISBN 0 580 15828 4 Committees 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 wer
4、e represented: Association of Metropolitan Authorities British Coal British Compressed Gases 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 E
5、xtinguishing Trades Association Health and Safety 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
6、of Motor Manufacturers and Traders Limited Water Authorities Association The following bodies were also represented in the drafting of the standard, through subcommittees and panels: Association of Hydraulic Equipment Manufacturers British Plastics Federation Energy Industries Council Engineering Eq
7、uipment and Materials Users Association Petrol Pump Manufacturers Association United Kingdom Petroleum Industry Association Ltd. Amendments issued since publication Amd. No. Date CommentsBS5173-102.8:1987 BSI 07-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 A
8、pparatus 1 3 Test pieces 1 4 Conditioning 1 5 Test procedure 1 6 Test report 1 Figure 1 Pressure impulse cycle for thermoplastics hose 2 Figure 2 Schematic circuit for thermoplastics hose impulse test rig 3 Publications referred to Inside back coverBS5173-102.8:1987 ii BSI 07-1999 Foreword This Sect
9、ion of BS 5173, prepared under the direction of the Rubber Standards Committee, is a revision of clause8 of BS 5173-2:1976, which is to be withdrawn by amendment. The remainder 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 S
10、ection of BS5173, as described in BS5173-100. This Section of BS 5173 is technically equivalent to Annex A of ISO3994-1977 published by the International Organization for Standardization (ISO). A British Standard does not purport to include all the necessary provisions of a contract. Users of Britis
11、h 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, pages1 to 4, an inside back cover and a back cover.
12、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.BS5173-102.8:1987 BSI 07-1999 1 1 Scope This Section of BS5173 describes a pressure impulse test applicable to thermoplastics hoses co
13、ntaining a helical rigid polymeric reinforcement. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 2 Apparatus A test rig is required with a hydraulic circuit capable of applying an internal hydraulic pressure which can be released at a predetermin
14、ed level, delaying the pressure cycle by a fixed period of time and then repeating the cycle. The cycle shall comply with the pressure/time requirements ofFigure 1. NOTE 1A suitable circuit is shown inFigure 2. NOTE 2Unless otherwise agreed between the hose manufacturer and the user, the test fluid
15、should be water, which may be suitably dyed. 3 Test pieces A minimum of three test pieces shall be used for each test. The length of each test piece shall be such that there is a clear distance between the fittings of at least five times the internal diameter. 4 Conditioning No test shall be carried
16、 out within24h of manufacture. Test pieces shall be conditioned at23 2 C for at least3h before testing. This period may be part of the24h following manufacture. 5 Test procedure 5.1 Attach the test piece to the system in a straight condition and ensure that all air is purged from the system with the
17、 test fluid. 5.2 Apply a pulsating sequence as shown in Figure 1 with the test fluid temperature maintained at23 2 C. 5.3 Repeat the cycle to hose failure or for the specified number of cycles. NOTEThe test pressure and minimum number of cycles before failure should be specified in the individual ho
18、se specification or should be agreed between the purchaser and the manufacturer. 5.4 Note the position and mode of failure for each test piece. NOTEThe test piece is considered to have failed if it develops a leak or ruptures (i.e. the reinforcement helix breaks). Discard any test piece which fails
19、within a distance of one hose internal diameter from either coupling and test another test piece. 6 Test report The test report shall include the following information: a) the hose type and nominal bore; b) the date of manufacture and batch number or reference if known; c) the method of manufacture
20、and details of reinforcement; d) details of end fittings used; e) the number and Section of this British Standard, i.e. BS5173-102.8; f) the test pressure; g) the test fluid and any dye used; h) the test piece length; i) the number of cycles to failure of each test piece; j) the position and mode of
21、 failure of each test piece.BS 5173-102.8:1987 2 BSI 07-1999 Figure 1 Pressure impulse cycle for thermoplastics hoseBS 5173-102.8:1987 BSI 07-1999 3 Figure 2 Schematic circuit for thermoplastics hose impulse test rig4 blankBS5173-102.8:1987 BSI 07-1999 Publications referred to BS 5173, Methods of te
22、st for hoses 1) . BS 5173-2, Hydraulic pressure tests. BS 5173, Methods of test for rubber and plastics hoses and hose assemblies 1) . BS 5173-100, General introduction. ISO 3994, Plastics products Hose of polymer reinforced thermoplastics for suction and discharge 1) . 1) Referred to in the forewor
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