BS 6501-1-2004 Metal hose assemblies - Guidance on the construction and use of corrugated hose assemblies《金属软管组件 波纹形软管组件的构造和使用指南》.pdf

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1、BRITISH STANDARD BS 6501-1:2004 Metal hose assemblies Part 1: Guidance on the construction and use of corrugated hose assemblies ICS 23.040.70 BS 6501-1:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 19 February 2004 BSI 19 February 200

2、4 First published August 1984 Second edition September 1991 Third edition February 2004 The following BSI references relate to the work on this British Standard: Committee reference PSE/12 Draft for comment 03/105322 DC ISBN 0 580 43127 4 Committees responsible for this British Standard The preparat

3、ion of this British Standard was entrusted to Technical Committee PSE/12, Metal hoses, hose assemblies, bellows and expansion joints, upon which the following bodies were represented: Advantica Technologies British Compressed Gases Association British Rubber Manufacturers Association Ltd. Energy Ind

4、ustries Council Ministry of Defence UK Defence Standardization UK Petroleum Industry Association Ltd. Co-opted members Amendments issued since publication Amd. No. Date CommentsBS 6501-1:2004 BSI 19 February 2004 i Contents Page Committee responsible Inside front cover Foreword ii 1S c o p e 1 2 Nor

5、mative references 1 3T e r m s a n d d e f i n i t i o n s 1 4 Guidance on the selection of corrugated hose assemblies 1 Annex A (informative) Selection and installation of corrugated metal hose assemblies 3 Annex B (informative) Hose assembly lengths and installation configurations 18 Annex C (info

6、rmative) Flame test 22 Bibliography 25 Figure B.1 Vertical loop (maximum vertical travel about fixed point) 18 Figure B.2 Vertical loop (short horizontal travel) 19 Figure B.3 Horizontal loop (maximum horizontal travel about fixed point) 20 Figure B.4 Correct installation of hose assemblies 21 Figur

7、e C.1 Butane gas torch for standard flame test 23 Figure C.2 Typical flame test rig 24 Table A.1 Comparison between the flexibility requirements of BS 6501-1:1991, Type C and BS EN ISO 10380:2003, Type 1 4 Table A.2 Guidance on the corrosion resistance of materials (see Note) 6BS 6501-1:2004 ii BSI

8、19 February 2004 Foreword This Part of BS 6501-1 has been prepared by Technical Committee PSE/12. It supersedes BS 6501-1:1991 which is withdrawn. This edition has been produced to compliment BS EN ISO 10380 and its contents are topics that are not covered by BS EN ISO 10380 but were in the 1991 ver

9、sion of BS 6501-1. BS EN ISO 10380 specifies requirements for the design, manufacture and testing of corrugated metal hose assemblies for general purposes. This revision of BS 6501-1 gives guidance on the installation and selection of corrugated metal hose assemblies. A high temperature resistance t

10、est for hose assemblies is also included. BS 6501-2 covers strip-wound hose assemblies. Corrugated metal hoses assemblies, as part of pipework systems, are used to convey liquids and gases under various pressure and temperature conditions in applications where, because of the need to accept displace

11、ment during operation, the use of standard piping materials is precluded. Corrugated hose assemblies may be used also as pipelines for connecting fixed and movable installations during loading/discharge operations. On account of the materials of its construction, a corrugated hose is electrically co

12、nductive and is more suitable for certain duties than a non-metallic hose, particularly where resistance to extremes of temperature, crushing or fire and flame is involved. Corrugated hose assemblies are suitable also for applications involving vacuum or high pressure. The piping services in which c

13、orrugated metal hose assemblies may be used include those for hazardous applications such as high pressure steam, chemicals and gases as well as non-hazardous applications. Assessed capability. Users of this British Standard are advised to consider the desirability of quality system assessment and r

14、egistration against the appropriate standard in the BS EN ISO 9000 series by an accredited third-party certification body. A British Standard does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard

15、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 to 25 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.BS 6501-1:2004 BSI

16、 19 February 2004 1 1 Scope This part of BS 6501 gives guidance on the installation of corrugated metal hose assemblies and on the selection of the method of construction, the flexibility type and the material used for the hose. This part of BS 6501 is complementary to BS EN ISO 10380. NOTE 1 Corrug

17、ated hose assemblies generally are not suitable for applications involving axial compression or extension. NOTE 2 Guidance on the selection and application of metal hose assemblies is given in Annex A and Annex B. 2 Normative references The following referenced documents are indispensable for the ap

18、plication of this document. For dated references, only the reference cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. BS EN ISO 7369, Metal hoses and hose assemblies Vocabulary. BS EN ISO 10380:2003, Corrugated metal hoses and h

19、ose assemblies. 3 Terms and definitions For the purposes of this part of BS 6501, the terms and definitions given in BS EN ISO 7369 apply. 4 Guidance on the selection of corrugated hose assemblies 4.1 Materials Due consideration should be given to the selection of suitable materials for the hose, br

20、aid if fitted, and the end fittings. Materials for the manufacture of corrugated metal hose assemblies should be selected on the basis of their suitability for fabrication, e.g. cold forming, welding, as appropriate, and according to the conditions under which they will operate. NOTE 1 Because of th

21、e wide variety that exists in such conditions and the choice of materials available, this standard does not make the choice of materials the subject of compliance by specifying a comprehensive list of materials. BS EN ISO 10380:2003, Table 1, however, lists those materials that are preferred. Table

22、1 should be used in conjunction with the requirements of BS EN ISO 10380:2003, 4.2e). NOTE 2 Further guidance on the selection of materials is given in A.3.1. 4.2 Hose construction Where concerns exist regarding the environment (see BS EN ISO 10380:2003, 4.1a) or the product conveyed (see BS EN ISO

23、10380:2003, 4.2c) being a potential source of crevice corrosion, construction type X as given in BS EN ISO 10380:2003, 5.5 should be used. 4.3 Temperature related corrosion resistance The effect of temperature on the corrosion resistance of the assembly should be considered and reference should be m

24、ade to BS EN ISO 10380:2003, 4.1a), 4.1g) and 4.2c). NOTE Further guidance on the effect of temperature on corrosion resistance is given in A.3.2. 4.4 Pressure The effect of pressure variations should be considered. NOTE Guidance on this topic is given in A.3.3. 4.5 Product velocity High product vel

25、ocities should be avoided. NOTE Limits on product velocities and corrective action are given in A.3.4.BS 6501-1:2004 2 BSI 19 February 2004 4.6 High temperature resistance Hose assemblies with welded end fittings may be subjected to the test described in Annex C. At no time during the test may the s

26、ample show any signs of leakage. NOTE The flame test simulates a 1 000 C flame. 4.7 Flexibility The requirements given in BS EN ISO 10380:2003, 4.1c) should be used as the basis for the selection of the hose flexibility requirement. NOTE Further details on flexibility are given in A.2.BS 6501-1:2004

27、 BSI 19 February 2004 3 Annex A (informative) Selection and installation of corrugated metal hose assemblies A.1 General A.1.1 This annex is provided in order to assist the purchaser in the selection of a hose assembly for a specific application, taking into account pressure, temperature and other c

28、onsiderations and to give guidance on hose installation and handling. A.1.2 A hose assembly has the following four basic uses: a) it facilitates movement, e.g. that associated with thermal expansion in piping or with connection to moving components; b) it facilitates random motion, e.g. that which o

29、ccurs in plant transfer hose; c) it facilitates ease of connection between non-moving parts and compensates for misalignment, e.g. in gas meter installations; d) it greatly reduces the transmission of vibration, e.g. local to pump connections. A.1.3 The following points should be considered when sel

30、ecting a hose assembly: a) the movement required; b) the cyclic life required; c) the product to be conveyed by the hose assembly; d) the design pressure (see BS EN ISO 10380:2003, 5.3.1); e) the design temperature range (see BS EN ISO 10380:2003, 5.3.2); f) the handling and installation requirement

31、s e.g. minimum bend radius and maximum unsupported length; g) the environmental conditions; h) any special conditions such as pressure fluctuations due to pump surge, valve opening or closing, high product velocity, etc. (see A.3.4). A.2 Hose assembly types A.2.1 General Three types of hose flexibil

32、ity are specified in BS EN ISO 10380:2003. When selecting the cyclic life, it should be borne in mind that the service life of the assembly will be dependent also upon the other parameters listed in A.1.3. A.2.2 Type 1 hose assemblies BS EN ISO 10380 Type 1 hose is a highly flexible hose designed fo

33、r demanding applications. However, its test requirements are less demanding than those of BS 6501-1:1991, Type C. A comparison between the requirements of BS 6501-1:1991, Type C and those of BS EN ISO 10380:2003, Type 1 is shown in Table A.1. Where a purchaser requires Type C flexibility, the manufa

34、cturer should be consulted. A.2.3 Type 2 hose assemblies BS EN ISO 10380:2003 Type 2 hose is a flexible hose designed for typical applications. A.2.4 Type 3 hose assemblies BS EN ISO 10380:2003 Type 3 hose is a bendable hose designed for use in static installations in order to overcome problems of m

35、isalignment or offset and to facilitate connection. Type 3 assemblies should be used only for applications where pliability, as opposed to flexibility, is required.BS 6501-1:2004 4 BSI 19 February 2004 Table A.1 Comparison between the flexibility requirements of BS 6501-1:1991, Type C and BS EN ISO

36、10380:2003, Type 1 A.3 Selection of hose assemblies A.3.1 Materials It is essential to select a material that has adequate resistance to both product and environment. Where resistance to the environment is the determining factor, the use of an outer sleeve or jacket might be preferable to the select

37、ion of more expensive materials for the hose. Details of internal and external plant cleaning routines should be considered where appropriate. Guidance on the corrosion resistance of commonly used hose assembly materials is given in BS 6501-1, Table A.2. This table should be read in conjunction with

38、 BS EN ISO 10380:2003, Table 1, but not all hose materials and products conveyed are included in the table. The manufacturer should be consulted before materials are selected. A.3.2 Temperature Where a hose is required for use at temperatures in excess of 50 C and in the presence of certain corrosiv

39、e agents, notably halogens, the possibility of stress corrosion should be considered and a suitable material resistant to this type of failure should be selected. In some applications high temperatures can alternate with lower temperatures with the attendant risk of condensation and corrosion. Detai

40、ls of temperature de-rating factors based on a creep life of 100 000 h are given in BS EN ISO 10380: 2003, Table 3. A.3.3 Pressure When selecting the nominal pressure of a hose assembly to be used, consideration should be given to the nature of the pressure to be applied. Where shock or pulsating pr

41、essure are likely to occur, the manufacturer should be consulted. A.3.4 Product velocity Liquid velocities in excess of 5 m/s and gas velocities in excess of 60 m/s can force the corrugations into resonant vibration resulting in premature failure. Such failure may be prevented by the use of flexible

42、 liners. The manufacturer should be consulted in these cases. A.3.5 Coverings and coatings It is strongly recommended that synthetic covers and protective coatings should not contain chlorine or sulfur, examples include neoprene, PVC, marking inks and paint. DN BS 6501-1, Flexibility Type C BS EN IS

43、O 10380, Flexibility Type 1 Bend radius Life Bend radius Life 4 40 000/50 000 100 8 000/10 000 6 100 40 000/50 000 110 8 000/10 000 8 40 000/50 000 130 8 000/10 000 10 150 40 000/50 000 150 8 000/10 000 12 200 40 000/50 000 165 8 000/10 000 15 200 40 000/50 000 195 8 000/10 000 20 200 40 000/50 000

44、225 8 000/10 000 25 200 40 000/50 000 260 8 000/10 000 32 250 40 000/50 000 300 8 000/10 000 40 250 40 000/50 000 340 8 000/10 000 50 350 40 000/50 000 390 8 000/10 000 65 410 40 000/50 000 460 8 000/10 000 80 450 40 000/50 000 660 8 000/10 000 100 560 40 000/50 000 750 8 000/10 000 125 660 40 000/5

45、0 000 1 000 8 000/10 000 150 815 40 000/50 000 1 250 8 000/10 000 200 1 015 40 000/50 000 1 600 8 000/10 000 250 1 220 40 000/50 000 2 000 8 000/10 000 300 1 420 40 000/50 000 2 400 8 000/10 000BS 6501-1:2004 BSI 19 February 2004 5 End fittings that have been galvanized and paints containing zinc sh

46、ould not be used. Other non-ferrous metals, e.g. lead and tin, can cause damage similar to that caused by zinc. NOTE At temperatures over 450 C, either under working conditions or as a result of a plant fire, zinc can rapidly penetrate and embrittle austenitic stainless steel and high nickel alloys.

47、 For further information, see Guidance Note PM13, from the Health and Safety Executive, Zinc embrittlement of austenitic stainless steel 3 1. A.3.6 Guidance on the choice of materials A.3.6.1 General Operating temperature can affect the choice of hose materials from the point of view of resistance t

48、o corrosion. Data on fluid compatibility are given in Table A.2. Most service requirements in industry can be met by selecting from the materials listed in Table A.2. A.3.6.2 Hose materials A.3.6.2.1 Austenitic stainless steels A.3.6.2.1.1 ISO 9328-5 type X6CrNiTi 18 10 This material is commonly use

49、d where good corrosion resistance and satisfactory mechanical properties over a wide temperature range are required. The material is stabilized and, therefore, is resistant to corrosion problems associated with welding. A.3.6.2.1.2 ISO 9328-5 type X2CrNiMo 17 12 This material offers improved resistance to pitting corrosion but, since it is a non-stabilized alloy, carbon precipitation can be a problem where carbon steel end fittings are used. A.3.6.2.1.3 ISO 9328-5 type X2CrN