BS EN 1256-2006 Gas welding equipment - Specification for hose assemblies for equipment for welding cutting and allied processes《气焊设备 焊接、切割和相关工艺用软管组件规范》.pdf

1、BRITISH STANDARDBS EN 1256:2006Gas welding equipment Specification for hose assemblies for equipment for welding, cutting and allied processesThe European Standard EN 1256:2006 has the status of a British StandardICS 25.160.30g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53

2、g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 1256:2006This British Standard was published under the authority of the Standards Policy and Strategy Committeeon 27 February 2006 BSI 27 February 2006ISBN 0 580 47861

3、0National forewordThis British Standard is the official English language version of EN 1256:2006. It supersedes BS EN 1256:1996 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee WEE/18, Gas welding and cutting appliances, which has the responsibility to:

4、 aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK.A list of organizatio

5、ns represented on this committee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogueunder the section entitled “International Standards Correspondence I

6、ndex”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard does not of itself con

7、fer immunity from legal obligations.Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 10, an inside back cover and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued

8、since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 1256February 2006ICS 25.160.30 Supersedes EN 1256:1996English VersionGas welding equipment - Specification for hose assemblies forequipment for welding, cutting and allied processesMatriel de soudage aux gaz - S

9、pcifications relatives auxassemblages des tuyaux souples sur les douilles porte-tuyaux pour matriel de soudage, coupage et techniquesconnexesGasschweigerte - Festlegungen fr Schlauchleitungenfr Ausrstungen fr Schweien, Schneiden und verwandteProzesseThis European Standard was approved by CEN on 16 D

10、ecember 2005.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be ob

11、tained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secr

12、etariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portu

13、gal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means res

14、ervedworldwide for CEN national Members.Ref. No. EN 1256:2006: EEN 1256:2006 (E) 2Contents pageForeword 31 Scope .42 Normative references .43 Terms and definitions.44 Construction55 Performance requirements and test methods 66 Marking of hose assemblies 7Annex A (informative) Guidance on hose tail d

15、imensions 8Annex B (informative) Examples for design of kinking protection.10Figures Figure 1 Examples for hose assemblies 5 Figure A.1 Examples of a hose tail profile 9 Figure B.1 Hose assembly with ferrule and kinking protection 10 Figure B.2 Hose assembly with hose clip and kinking protection . 1

16、0 Tables Table 1 Axial load for separation test . 7 Table A.1 Suggested dimensions for hose tail 8 EN 1256:2006 (E) 3Foreword This European Standard (EN 1256:2006) has been prepared by Technical Committee CEN/TC 121 “Welding”, the secretariat of which is held by DIN. This European Standard shall be

17、given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2006, and conflicting national standards shall be withdrawn at the latest by August 2006. This European Standard supersedes EN 1256:1996. According to the CEN/CENELEC Intern

18、al Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherl

19、ands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 1256:2006 (E) 41 Scope This European Standard specifies performance and test requirements of hose assemblies, if supplied in assembled condition for equipment for gas welding, cutting and a

20、llied processes using rubber hoses in compliance with EN 559. This European Standard is not applicable to hose assemblies where the hoses are not in compliance with EN 559 (e.g. high pressure hoses). 2 Normative references The following referenced documents are indispensable for the application of t

21、his European Standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 559, Gas welding equipment Rubber hoses for welding, cutting and allied processesEN 560, Gas welding equipment Hos

22、e connections for equipment for welding, cutting and allied processes EN 29090, Gas tightness of equipment for gas welding and allied processes (ISO 9090:1989) EN 29539, Materials for equipment used in gas welding, cutting and allied processes (ISO 9539:1988)3 Terms and definitions For the purposes

23、of this European Standard, the following terms and definitions apply. 3.1 hose assemblyassembly consisting of a hose tail inserted into the end of a hose and secured by a suitable hose mounting device against sliding off (see Figure 1) 3.2 hose tailend of a coupling device (e.g. nipple/nozzle) to be

24、 inserted into a hose 3.3 hose mounting device non-detachable component such as ferrule or hose clip, which prevents sliding off of the hose from the hose tail 3.4 ferrule metallic component providing frictional connection between sleeve, hose and hose tail by means of pressing 3.5 hose clip metalli

25、c component providing frictional connection between sleeve, hose and hose tail by means of clamping 3.6 mounting area area on the hose tail where the hose mounting device is positioned EN 1256:2006 (E) 5Key 1 hose tail according to EN 560 3 hose clip 2 rubber hose according to EN 559 4 ferrule a dim

26、ensions for mounting area Figure 1 Examples for hose assemblies 4 Construction 4.1 Materials Hose assemblies shall be manufactured using hose connections according to EN 560, hoses according to EN 559. Other components for assembled hoses that come into direct contact with the gas supply shall compl

27、y with EN 29539. The materials used for hose mounting devices shall be corrosion resistant or protected against corrosion. For the manufacturing of assembled hoses no greases or pastes shall be used. 4.2 Design of hose tail and hose assembly 4.2.1 General Annex A (informative) gives some examples fo

28、r hose tails whose dimensions and shapes are in any case left to the manufacturers practice. The following general requirements shall be in any case fulfilled. 4.2.2 Hose tail The hose tail profile shall have no sharp edges that could damage the hose during the assembly operation and during use. The

29、 hose tail shall provide an adequate mounting area including dimensional additions on both sides for a safe positioning of the hose mounting device. 4.2.3 Hose assembly The hose shall be fitted to the hose tail by means of compatible hose mounting device, which provide a reproducible crimping perfor

30、mance. No worm screw drive or similar detachable clips or clamps shall be used to secure the hose to the hose tail. EN 1256:2006 (E) 64.3 Hose assemblies Before fitting any connections the hose shall be free from cuts, abrasions or any other external damage and, internally, free from dirt, talcum po

31、wder, rubber fragments or other particles that could interfere with the correct gas flow and the operation of safety devices. The hose mounting device shall not have prominent parts which could cause injuries during operation. NOTE In order to prevent the kinking of the hose adjacent to the coupling

32、 kinking protection in accordance with Annex B (informative) should be added, if required specifically for the application. 5 Performance requirements and test methods 5.1 General The following type tests shall be carried out for each combination of a hose tail with the hose and the hose mounting de

33、vice. 5.2 Gas tightness 5.2.1 Test method The hose assembly shall be tested in accordance with the test described in EN 29090. The test shall be carried out only at the maximum operating pressure of the hose. 5.2.2 Acceptance requirements The measured leakage rate shall not exceed 4 cm3/h. 5.3 Resis

34、tance to separation under pressure 5.3.1 Test method The hose assemblies shall be plugged and pressurised with an internal hydrostatic pressure of three times the maximum operating pressure of the hose. NOTE Pneumatic testing can be used for this test provided adequate safety precautions are taken t

35、o protect persons at risk in the event of equipment failure. 5.3.2 Acceptance requirements When tested in accordance with 5.3.1 the hose shall not separate from the hose tail. 5.4 Resistance to separation under axial load 5.4.1 Test method The un-pressurized assembled hose is subjected to the loads

36、given in Table 1. Apply the load in an axial direction and hold for 2 min. 5.4.2 Acceptance requirements During the test no separation of the hose from the hose tail or fracture of components shall occur under axial load. After removal of the load the hose assembly shall remain gas tight when tested

37、 in accordance with 5.2. EN 1256:2006 (E) 7Table 1 Axial load for separation test Hose bore (nominal) in mm Axial load in N 56,3 81012,5 1620440 520 650 850 1 050 1 360 1 700 6 Marking of hose assemblies Hose assemblies shall be durably marked with the following information: manufacture name or trad

38、e mark; reference to this European Standard, i.e. EN 1256. This information shall be marked on the hose mounting device or on a separate band fixed on the hose adjacent to the coupling or on the mounting device. EN 1256:2006 (E) 8Annex A(informative)Guidance on hose tail dimensions Because of variat

39、ions in elasticity and dimensions permitted together with the variable results that can occur according to the type of hose mounting device selected for fixing the hose to the hose tail, it is not practicable to specify dimensions for a hose tail. However, where possible, the dimensions given in Tab

40、le A.1 and shown in the Figure A.1 should be used for guidance. Table A.1 Suggested dimensions for hose tail Nominal hose bore Lmin.D1 max.02,02D02,03D D4 max.mm mm mm mm mm 5,0 20,5 4,1 5,35 6,3 7,25 6,3 20,5 5,2 6,65 7,6 8,55 8,0 25,5 6,2 8,35 9,3 10,25 10,0 25,5 8,2 10,35 11,3 12,25 12,5 32,5 10,

41、2 12,85 13,8 14,75 16,0 32,5 12,2 16,35 17,3 18,25 20,0 37,5 15,2 20,35 21,3 22,25 NOTE It is important that the hose tail profiles have no sharp edges that could damage the hose or hose lining whilst in use. EN 1256:2006 (E) 9No sharp edges Key 1 dimensions in accordance with EN 560 Figure A.1 Exam

42、ples of a hose tail profile EN 1256:2006 (E) 10Annex B(informative)Examples for design of kinking protection In special applications in order to limit movement of the hose in the area outside the hose tail, a kinking protection (see Figure B.1 and B.2) may be added in order to prevent premature dama

43、ge to the lining of the hose at the front edge of the hose tail. Key1 hose tail 3 kinking protection 2 ferrule 4 hose according to EN 559 Figure B.1 Hose assembly with ferrule and kinking protection Key1 hose tail 3 kinking protection 2 hose clip 4 hose according to EN 559 Figure B.2 Hose assembly w

44、ith hose clip and kinking protection blankBS EN 1256:2006BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards InstitutionBSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorp

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