BS 1435-2-2005 Rubber hose assemblies for oil suction and discharge services - Recommendations for storage testing and use《抽油和排油用橡胶软管组件 贮存、试验和使用建议》.pdf

《BS 1435-2-2005 Rubber hose assemblies for oil suction and discharge services - Recommendations for storage testing and use《抽油和排油用橡胶软管组件 贮存、试验和使用建议》.pdf》由会员分享，可在线阅读，更多相关《BS 1435-2-2005 Rubber hose assemblies for oil suction and discharge services - Recommendations for storage testing and use《抽油和排油用橡胶软管组件 贮存、试验和使用建议》.pdf（14页珍藏版）》请在麦多课文档分享上搜索。

1、BRITISH STANDARD BS 1435-2: 2005 Rubber hose assemblies for oil suction and discharge services Part 2: Recommendations for storage, testing and use ICS 75.180.99 BS 1435-2:2005 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 15 May 2005 BSI 1

2、5 May 2005 First published 15 May 1990 The following BSI references relate to the work on this standard: Committee reference PRI/66 Draft for comment 04/30096443DC ISBN 0 580 458598 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical C

3、ommittee PRI/66, Rubber and plastics tubing, hoses and hose assemblies, upon which the following bodies were represented: British Compressed Gases Association British Fluid Power Association British Rubber Manufacturers Association Energy Industries Council Fire Extinguishing Trades Association Fore

4、court Equipment Federation London Fire and Emergency Planning Authority MoD UK Defence Standardization RAPRA Technology Ltd. Society of Motor Manufacturers and Traders Ltd. Co-opted members Amendments issued since publication Amd. No. Date Text affectedBS 1435-2:2005 BSI 15 May 2005 i Contents Page

5、Foreword ii 1S c o p e 1 2 Normative references 1 3 Terms and definitions 1 4 General 1 5S t o r a g e o f n e w hose assemblies 1 6 Inspection and testing 3 7 Handling and use of hose assemblies 4 Annex A (normative) Log for recording hose assembly service and tests 8 Figure 1 Storage and support s

6、ystem for new and used hose assemblies 6 Figure 2 Lifting system 7BS 1435-2:2005 ii BSI 15 May 2005 Foreword This British Standard was prepared by Technical Committee PRI/66. It supersedes BS 1435-2:1990, which is now withdrawn. BS EN 1765 replaced BS 1435-1 in 1998. BS 1435-2 has been revised to re

7、flect that change and is to be read in conjunction with BS EN 1765. The purpose of this standard is to assist the user in obtaining good service and optimum service life from hose assemblies, as well as to assist in maintaining their safe operation. Local safety regulations at the place where hose a

8、ssemblies are used may, however, take precedence over these recommendations. 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 conf

9、er immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 9 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.BS 1435-2:2005 BSI 15 May 2005 1 1 Scope T

10、his British Standard recommends conditions for the storage, testing and use of rubber hose assemblies manufactured in accordance with BS EN 1765. It provides advice on the storage, testing and use of rubber hose assemblies for oil suction and discharge duties commonly used for transferring crude oil

11、 and other liquid petroleum products, excluding liquid petroleum gas (LPG) and natural gas, to and from tanker and bunkering vessels or for similar duties ashore. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, o

12、nly the reference cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. BS EN 1765, Rubber hose assemblies for oil suction and discharge services Specification for the assemblies. BS EN 8330, Rubber and plastics hoses and hose assemb

13、lies Vocabulary. BS EN ISO 7233, Rubber and plastics hoses and hose assemblies Determination of suction resistance. BS EN ISO 8031, Rubber and plastics hoses and hose assemblies Determination of electrical resistance. 3 Terms and definitions For the purposes of this British Standard, the terms and d

14、efinitions given in BS EN 8330 apply. 4 General The following apply to all types of hose assemblies. a) In consultation with the hose manufacturer, retirement age should be defined for each hose type/service to determine when it should be removed from service irrespective of meeting inspection and t

15、esting criteria. b) Hose assemblies should be clearly marked for a particular service and checked at the time of issue as being suitable for the intended use (see 5.7). All persons handling hose assemblies should fully understand the meaning of the marking system. 5 Storage of new hose assemblies NO

16、TE Rubbers change in physical properties during storage and in use and ultimately can become unserviceable because of excessive hardening, softening, cracking, crazing or other degradation. The changes can result from the action of oxygen, ozone, light, heat, humidity, chemicals, insects and rodents

17、 and from internal pressure. Reinforcement materials can also be adversely affected by unsuitable conditions of storage. The object of Clause 5 is to advise how these effects can be minimized by careful choice of storage conditions. 5.1 Use of racks Where possible, racks should be used for storing h

18、ose assemblies. These racks enable hose assemblies to be stored up to three high on each rack, reduce the area required for hose storage and minimize the likelihood of damage from storing hose assemblies one on top of another. If racks are not used, hose assemblies should be laid out straight and ho

19、rizontally on solid supports as shown in Figure 1. Lightweight hose assemblies should be laid out so that they are not subject to flattening. Hose assemblies should, wherever possible, be stored in a relaxed condition free from tension, compression, or other deformation. If it is not possible to avo

20、id bending the hose assembly because of its length, the hose assembly should be coiled to as large a diameter as possible and not less than twice the minimum bend radius specified in BS EN 1765. Hose assemblies should be stored in a cool, dark, dry, and well-ventilated area and in a place where they

21、 are not liable to mechanical damage. Where closed storage is not practicable, hose assemblies should be kept in their original shipping containers to provide a measure of protection provided that the hose assembly is not bent to a radius less than twice the minimum bend radius specified in BS EN 17

22、65.BS 1435-2:2005 2 BSI 15 May 2005 5.2 Temperature The storage temperature should preferably be below 25 C, and every effort should be made to keep it below 35 C, as higher temperatures cause rubber materials to deteriorate more rapidly. Hose assemblies should not be stored close to sources of heat

23、 that might raise their temperature above 25 C. When hose assemblies form part of mechanical equipment, it might not be possible to store them in ideal conditions. Every effort should, however, be made to ensure that the temperatures to which they will be exposed are kept within the preferred limits

24、. 5.3 Humidity Very moist or very dry storage conditions should be avoided. An atmosphere of 65 % r.h. is recommended. 5.4 Light Hose assemblies should be protected from light, particularly direct sunlight and strong artificial light. Unless the hose assemblies are packed in opaque containers, it is

25、 advisable to cover all windows in storage rooms with a red or orange translucent coating, or a screen to protect them from direct light. 5.5 Oxygen and ozone Wherever possible, hose assemblies should be protected from circulating air by storage in airtight containers. Ozone is injurious to most rub

26、bers and storage rooms should not contain any equipment which can generate ozone, such as mercury vapour lamps, high voltage electrical equipment, welding equipment, electric motors or other equipment which might give rise to electric sparks or silent electrical discharges. 5.6 Contact with other ma

27、terials Storage areas should be free from oils, greases, solvents, corrosive substances or any other liquids or gases that can adversely affect the condition of the hose assembly. Direct contact with some metals (e.g. manganese, iron and, particularly, copper and its alloys) and their compounds can

28、have deleterious effects on some rubbers. Hose assemblies should, therefore, not be stored in contact with such metals, or materials impregnated with their compounds, e.g. wood and wrapping materials impregnated with copper naphthenate. Similarly, contact with wood or fabric impregnated with creosot

29、e should be avoided. Because of the possible transfer of plasticizers or other ingredients, rubber hoses should not be stored in contact with plasticized PVC. NOTE Other rubber products that have been differently compounded can degrade the hose by migration of constituents if stored in contact with

30、hose assemblies. Oil temperatures in excess of 80 C will shorten the life of the hose assembly. 5.7 Bringing hose assemblies into use Hose assemblies conforming to BS EN 1765 are marked with the date of manufacture. Care should be taken to ensure that the oldest assembly is taken into service first.

31、 When hose assemblies are stored in their shipping containers, each container should be marked with the month and year of receipt and that hose assemblies are used in date order. Hose assemblies should be clearly marked for a particular service and checked at the time of issue as being suitable for

32、the intended use.BS 1435-2:2005 BSI 15 May 2005 3 6 Inspection and testing 6.1 Inspection during service The condition of the hose assembly should be determined by internal and external inspection and by hydrostatic testing for all types. Inspection and testing, together with knowledge of local serv

33、ice conditions such as the products conveyed by the hose assembly, the age of the hose assembly and the type of handling equipment used, should be considered when deciding if a hose assembly should be withdrawn from service. Hose assemblies should be visually inspected on a regular basis. When hose

34、assemblies are in constant or frequent use, the assembly should be inspected before each loading/unloading operation. When it is not practicable to do this, inspections should be not less frequent than one per day. Hose assemblies subject to infrequent use should be inspected each time they are brou

35、ght into use. Visual inspection should consist of: a) examining the hose assembly for irregularities in the outside diameter, e.g. kinking; b) examining the hose cover for damaged or exposed reinforcement or permanent deformation; c) examining the end fittings for signs of damage, slippage or misali

36、gnment. Any hose assembly exhibiting any of the above defects should be removed from service for more detailed inspection. When a hose assembly is withdrawn from service following a visual inspection, the reason for withdrawal and the date should be recorded as shown in Annex A. 6.2 Hydrostatic test

37、ing of hose in service 6.2.1 Frequency Hose assemblies should be hydrostatically tested in accordance with BS EN 1765. The interval between tests should be determined in accordance with service experience but should not be more than 12 months in any case. Testing intervals may be shortened according

38、ly for hoses handling particularly aggressive products or products at elevated temperatures. A record should be kept of the service history of each hose assembly as shown in Annex A. 6.2.2 Test procedure Lay out the hose assembly straight on level supports that allow free movement of the hose when t

39、he test pressure is applied. Seal the hose by bolting blanking-off plates to both ends, one plate to be fitted with a connection to the water pump and the other to be fitted with a hand operated valve to release air. Fill the hose assembly with water. Connect the test pump at one end and release the

40、 trapped air from the other. Measure and record the overall length of the hose assembly. Slowly increase the pressure up to the factory test pressure marked on the hose and given in BS EN 1765. Hold the test pressure for a period of 10 min whilst examining the hose assembly for leaks at the nipples

41、or for any signs of distortion or twisting. At the end of the 10 min period and while the hose assembly is still under full pressure, re-measure the length of the hose assembly. Reduce the pressure to zero and drain the hose assembly. If while the used hose assembly is under test pressure there are

42、no signs of leakage or movement of the fitting but the hose assembly exhibits significant distortion or excessive elongation, the hose assembly should be scrapped and not returned to service. 6.3 Test records Test records should be kept of each hose assembly so that the temporary elongation under pr

43、essure can be compared with that recorded on the original test certificate (see BS EN 1765). Specimen forms for these records as shown in Annex A should be used.BS 1435-2:2005 4 BSI 15 May 2005 6.4 Withdrawal from service In consultation with the hose manufacturer, retirement age should be defined f

44、or each hose type/service to determine when it should be removed from service irrespective of meeting inspection and testing criteria. The temporary elongations at which hose assemblies should be withdrawn from service will vary with the type of hose assembly construction such that either:a) the tem

45、porary elongation when measured in accordance with 6.2 should not exceed 1.5 times the temporary elongation when the hose assembly was new;b) for hose assemblies where the temporary elongation of a new assembly was 2.5 % or less, the temporary elongation at the test should be not more than 2 % more

46、than that of the new hose assembly. 6.5 Electrical continuity and discontinuity During and after the hydrostatic test, an electrical continuity test should be carried out in accordance with BS EN ISO 8031. For electrically bonded hose assemblies, electrical continuity should exist before, during (10

47、 min after application of the test pressure) and after the hydrostatic test. This should not exceed a maximum of 10 7 and should be measured with a low voltage test meter. For electrically discontinuous hose assemblies, the resistance between the end nipples of each length of hose assembly should be

48、 not normally less than 25 k 7 and the hose assembly should be taken out of service if the resistance is less than 1 k 7. The testing of electrically discontinuous hoses should be carried out using a 500 V tester. 6.6 Resistance to vacuum test (for Type “R”, “S” and “A” hose) A resistance to vacuum

49、test should be applied only if the user has reason to doubt the integrity of the hose lining. Carry out the resistance to vacuum test in accordance with BS EN ISO 7233. Type “L” hoses are for discharge applications only and should not be subjected to a vacuum test. 7 Handling and use of hose assemblies 7.1 Handling A hose assembly should not be lifted from a single point with the ends hanging down. Hose assemblies should be supported by at least two band slings located n