ISO 3807:2013 pdf free

ISO 3807:2013 pdf free.Gas cylinders一Acetylene cylinders一Basic requirements and type testing
For a range of cylinders of different water capacities as defined in 5.2.1 the following type tests shall be carried out and successfully passed:
a) two cylinders of the largest and two cylinders of the smallest water capacity shall be subjected to the porosity test in accordance with Annex A;
b) two cylinders shall be subjected to the compressive strength test in accordance with Annex B;
c) two cylinders of the largest water capacity shall be subjected to the elevated temperature test in accordance with D.2 or the calculation method is applied in accordance with D.3;
d) three cylinders of the largest and three cylinders of the smallest water capacity shall be subjected to the backfire test in accordance with Annex E;
e) for cylinders equipped with fusible plugs three cylinders of each nominal diameter shall be subjected to the fire test in accordance with Annex E in addition;
f) if the cylinder shell has joggle welds, three cylinders of the largest and three cylinders of the smallest water capacity shall be subjected to the test of the integrity of the porous material in the area of joggle welds in accordance with Annex G.
For cylinders which are identical to cylinders that have already passed prototype testing with regard to 5.2.1 c), d), e) and f) and differ only with regard to the type of material of the cylinder shell (see 5.2.1 a) and/or the construction of the cylinder shell (see 5.2.1 b), a reduced test programme may be performed in order to extend the approval as follows.
Three cylinders of the largest and three cylinders of the smallest water capacity shall be subjected to the drop procedure as specified in E.2. They shall then be sectioned longitudinally and inspected for damage to the porous material (e.g. excessive clearance, cracks, disintegration). If the porous material is undamaged, no further tests according to Annex E are required. If the porous material is damaged, a complete backfire test (see Annex E) on a further three cylinders of those water capacities that did not pass the drop test shall be carried out.
NOTE 1 Welded cylinders previously approved with joggle welds do not need a test for extension of the approval for other welded or seamless cylinders.
NOTE 2 The elevated temperature test (see Annex D) need not be carried out.
NOTE 3 The reduced test programme is not applicable to cylinders with non-monolithic porous materials.ISO 3807 pdf download.