Division 1.1 Pressurised parts

The materials used for manufacturing the pressurised parts of the vessels shall be:

1. (a)

   capable of being welded;

2. (b)

   ductile and tough, so that a rupture at minimum working temperature does not give rise to either fragmentation or brittle-type fracture;

3. (c)

   not adversely affected by ageing.

For steel vessels, the materials shall in addition meet the requirements set out in point 1.1.1 and, for aluminium or aluminium alloy vessels, those set out in point 1.1.2.

They shall be accompanied by an inspection slip as defined in point (i) of point 3.1 of Annex III, drawn up by the producer of the materials.