Welding evaluation for submerged arc welding
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I would like to ask the experts on this forum: can the PQR values for single-pass submerged arc welding be used in multi-pass submerged arc welding in the future? I checked the welding procedure qualification factors for 47014, and it only states that it is permissible to change from multiple passes of welding to a single pass per side; it doesn’t mention anything about a single pass I would be grateful for your advice! Thank you~
Theoretically, by switching from single-pass welding to multi-pass welding, the wire energy used during welding is lower than that in single-pass welding; as long as the thickness requirement is met, there is no need for re-evaluation. Conversely, reinforcement factors need to be increased.