EN ISO 15610 specifies how a welding procedure (WPQR) can be qualified by using tested welding consumables. But this application of EN ISO 15610 is limited to parent EN ISO 15608 material groups 1.1 and 8.1 (Material material thicknesses t ≤ 40 mm) and also EN ISO 15608 material groups 21, 22.1 and 22.2 (Material material thicknesses t ≤ 20 mm), which produce acceptable microstructures and properties in the heat-affected zone which do not deteriorate significantly in service.
EN ISO 15610 is not applicable when any of the following is specified for the welded joint:
- hardness;
- impact properties;
- preheating;
- controlled heat input;
- interpass temperature;
- post-weld heat treatment.
Is this WPQR (EN ISO 15610) accepted for pressure vessels design code EN 13445?
EN 13445-4 (steel pressure vessel) and EN 13445-8 (aluminium pressure vessel) does not accepted this WPQR. Also not for welds made directly on pressure vessels, that are not pressure-bearing, such as support rings, supports, saddles.
In accordance with EN 13445-4 (steel) and EN 13445-8 (aluminum), a welding procedure qualification test (WPQR) in accordance with EN ISO 15614-1 or EN 15614-2 is required for pressure vessels. This must be approved for category II, III and IV pressure equipment by a notified body or a recognised organisation third-party testing body.
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Which materials are meant in the above-mentioned material groups? You can find a list!
