Transportable gas cylinders - Compatibility of cylinder and valve materials with gas contents - Part 4: Test methods for selecting steels resistant to hydrogen embrittlement (ISO 11114-4:2017); German version EN ISO 11114-4:2017
Natural gas - Natural gas for use as a compressed fuel for vehicles - Part 1: Designation of the quality (ISO 15403-1:2006); German version EN ISO 15403-1:2008— 32 стр.