Certificate of Conformity of the Factory Production Control 0836-CPR-17/F411 Execution of steel structures and aluminium structures - Part 1: Requirements for conformity assessment of structural steel kits and components. Applicable standarad: BS EN 1090-2 : 2018 Execution class: EXC2 according to BS EN 1090-2 : 2018 Declaration methods: 1 & 3a according to table A. 1 : BS EN 1090-1 : 2009 + A1 : 2011 Parent metals: Mild steel up to and including S355 Welding process: MAG (135). TIG (141)