What are the standards for preparing Welding Procedure Specification (WPS), Procedure Qualification Record (PQR), and Welder Performance Qualification (WPQ)?

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WPS, PQR, and WPQ are essential documents in welding that ensure quality and compliance with industry standards.

Welding Procedure Specification (WPS): A document that provides detailed instructions for welding processes, including materials, techniques, and parameters.
Procedure Qualification Record (PQR): A record that demonstrates the capability of a welding procedure by testing and validating the welds produced.
Welder Performance Qualification (WPQ): A certification that verifies a welder's ability to produce sound welds according to the specified WPS.
Standards: Common standards include AWS D1.1 for structural welding, ASME Section IX for pressure vessels, and ISO 3834 for quality requirements.
Example: A WPS for MIG welding might specify the type of filler metal, shielding gas, and welding parameters like voltage and travel speed.

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What are the standards for preparing Welding Procedure Specification (WPS), Procedure Qualification Record (PQR), and Welder Performance Qualification (WPQ)?

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