Gas cylinders - Compatibility of cylinder and valve materials with gas contents - Part 2: Non-metallic materials (ISO/DIS 11114-2:2011); German version prEN ISO 11114-2:2011
Specification and approval of welding procedures for metallic materials - Part 1: General rules for fusion welding (including Amendment A1:1997); German version EN 288-1:1992 + A1:1997— 9 стр.