Thank you Sir for your helping response.
1.) For procedure qualification. Actually, the details of the production joint, I have to weld do not conform to the details of the groove for prequalification of WPS. Details of my production joint is 10 mm root face, 1 mm root gap and 60° groove angle and thickness of the plates to be welded is 21 mm. So, for this weld joint, I need to qualify the WPS by performing all the test of PQR qualification. So, what current range may I mention in the WPS, if I have used a range of current while performing a PQR i.e. I have used 170A for 1st pass, 200A for 2 nd pass and 150A for 3rd pass. Now, what amperage range may I mention in the WPS???
150 -+ 10% = 135 A / 165 A, 170 -+ 10% = 153 A / 187 A & 200-+10% = 180 A / 220 A
So, may I mention a current range in amperage as 145 A to 220 A for all the passes in the WPS? or should I mention like ' for 1st pass 145 A to 165 A; for 2nd pass 153 A to 187 A and for 3rd pass 180A to 220A?
2.) For welder Qualification. Engineer / Customer representative has not been decided yet for the contract. This contract needs the qualification as per AWS D1.1 . For this contract, I need to qualify the welders. I have written a prequalified WPS for the welder qualification purpose, but it has not been approved by Engineer / customer representative as engineer / customer representative has not been decided yet. So, may I qualify welders using this written prequalified WPS which has not been approved by engineer? May I qualify welders using this now and later I ask for engineer's aprroval, is it ok?
Thanks and Regards,
Mayur