Swiss Approval inspects and certifies welding processes and welders in accordance with the standards EN 15614-1, EN ISO 15609-1:2004, EN 287-1, EN 287-2 and BS EN 473. The welding process certification (WPQR) demonstrates the ability of a manufacturer to produce concrete seams that meet the construction quality requirements. Through the process certification (WPQR) the most successful option is determined: Method, Materials, Configuration, Auxiliary Materials and Welding Conditions, as well as Thermal Treatment Methods, before / During / After Welding.
With WPS (Welding Procedure Specification) the power ranges in nearly all factors (described in WPQR), such as material quality, material thickness, pipe diameter, type of connection (Butt, T, Fillet), welding position, etc, are extended.
Both WPQR and WPS special requirements derive from conventional Technical Specifications of the project which are taken into account.
We also offer EN 17020 Accredited Inspection Services fo the following standards regarding Welding Activities:
EN ISO 15614-1 to 6