Dear Gents,
We have different thicknesses, I have to confirm for the Impact Test (-20 degree Celsius) requirements According to API 1104 Minimum thickness qualified with the PQR is Restricted for the sour service or it is as mentioned in API 1104 (A3.2 Essential Variables) we can go +/- 0.125 inch (3.17 mm) for the Procedure Qualification according to our job / project thickness requirements.
My question is if we qualify a procedure with a thickness 10 mm with a mechanized (GMAW) & Manual (GMAW/FCAW) Processes two different PQR & WPS, then can we go up or down in thickness to weld of thickness +13.20 mm up and -6.83 mm Down possible. can we weld these thicknesses.?? our PQR will cover these thicknesses or not.? Restriction is minimum thickness qualified in PQR can we go down from that or not.?
Restrictions of OD +.5D & -0.25D as well mentioned.
Thanks for your consideration,
Regards,