Our PWHT company exceeded the weld procedure for the PWHT temperature of 1300F to 1350F for a 49 pieces of 2", 4", 6" and 10" pipe spools. The materials were ASME SA 333 gr. 6 pipe and ASME SA 350 gr. LF2 flanges welded with E8013-C3 consumables. Our European customer will not accept the 1350F...