EN ISO 15614-12:2004 Specification and qualification of welding procedures for metallic materials - Welding procedure test - Part 12: Spot@ seam and projection welding
2021EN ISO 15614-12:2021 Specification and qualification of welding procedures for metallic materials - Welding procedure test - Part 12: Spot, seam and projection welding (ISO 15614-12:2021)
2014EN ISO 15614-12:2014 Specification and qualification of welding procedures for metallic materials - Welding procedure test - Part 12: Spot, seam and projection welding (ISO 15614-12:2014)
2004EN ISO 15614-12:2004 Specification and qualification of welding procedures for metallic materials - Welding procedure test - Part 12: Spot@ seam and projection welding