(Standard EN ISO 3834-2:2005 – »Quality requirements for welding – Fusion welding of metallic materials – part 2 : comprehensive quality requirements« certified by Biro Veritas (BVQI))
(Standard EN ISO 1090-2:2008+A1:2012 – »Execution of steel and aluminium structures – part 2 : Technical requirements for steel structure » certified by Biro Veritas (BVQI))