GOST R ISO 15609-2-2009 Specification and qualification of welding procedures for metallic materials. Welding procedure specification. Part 1. Gas welding
ISO/TR 15608:2000 Welding - Guidelines for a metallic materials grouping system
GOST R ISO 15609-2-2009 history
2009GOST R ISO 15609-2-2009 Specification and qualification of welding procedures for metallic materials. Welding procedure specification. Part 1. Gas welding