Specification and approval of welding procedures for metallic materials - Part 3: Welding procedure tests for the arc welding of steel (includes Amendment A1:1997); German version EN 288-3:1992 + A1:1997— 27 стр.
Water-tube boilers and auxiliary installations - Part 3: Design and calculation for pressure parts of the boiler; German version EN 12952-3:2011— 167 стр.
Vitreous and porcelain enamels - Glass-lined apparatus for process plants - Part 4: Quality requirements for glass-lined flanged steel pipes and flanged steel fittings (ISO 28721-4:2015)
Gas infrastructure - Gas installation pipework with an operating pressure greater than 0,5 bar for industrial installations and greater than 5 bar for industrial and non-industrial installations - Part 1: Detailed functional requirements for design, materials, construction, inspection and testing