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Welding Procedure Specification (WPS) Shall give details of how a welding operation is to be performed and shall contain all relevant information about the welding work. Welding procedure specifications may cover certain range of thickness of the joined parts and may also cover a range of parent metals and even filler metals. Some manufacturers may prefer additionally to prepare work instructions for each specific job as part of detailed production planning. The relevant information shall be specified in the WPS. Ranges and tolerances, according to the manufacturer's experience, shall be specified where appropriate.

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