DIN EN 1256-2008 Gas welding equipment - Specification for hose assemblies for equipment for welding cutting and allied processes English version of DIN EN 1256 2008-03《气焊设备 焊接、切割和.pdf

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1、March 2008DEUTSCHE NORM English price group 11No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 23.040.70!$M reference t

2、o 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. DIN EN 1256:2008-03 EN 1256:2006 (E) 8 Annex A (informative) Guidance on hose tail dimensions Because of va

3、riations 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

4、 Table 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.02,02 D 02,03D 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、,5 10,2 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. DIN EN 1256:2008-03EN 1256:2006 (E) 9 No sharp edges Key 1 dimensions in accordance w

6、ith EN 560 Figure A.1 Examples of a hose tail profile DIN EN 1256:2008-03 EN 1256:2006 (E) 10 Annex 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

7、) may be added in order to prevent premature damage to the lining of the hose at the front edge of the hose tail. Key 1 hose tail 3 kinking protection 2 ferrule 4 hose according to EN 559 Figure B.1 Hose assembly with ferrule and kinking protection Key 1 hose tail 3 kinking protection 2 hose clip 4 hose according to EN 559 Figure B.2 Hose assembly with hose clip and kinking protection DIN EN 1256:2008-03

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