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welding procedure test coupon qualified

welding procedure test coupon qualified

As per welding procedure , welder is qualified up to 1" in production.
If welder do test coupon 1" by using above procedure then he should qualified up to 2".
Please advice

RE: welding procedure test coupon qualified

If all you are trying to do is qualify your welder to a greater thickness, test your welder on a 1/2" coupon. This will qualify for unlimited thickness..."Max to be welded".
See Table QW-452.1(b)
As others have stated, 3 layers minimum required.

RE: welding procedure test coupon qualified

Thanks david.

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