Control over PWHT activities
Posted: 14 Jul 2010, 12:33
Inspection points from AWS Welding Inspection Handbook, Article 8.2.1 (Heat Treating Inspection)
(1) Verification of preheat, interpass, and postweld heat treat temperatures
(2) Verification of surface cleanliness prior to preheating, welding, and postweld heat treating
(3) Calibration of temperature indicating and measuring devices and monitoring of their correct placement
(4) Monitoring the postweld beat treating operation to assure that the procedure requirements have been met
(5) Verification of the dimensional accuracy of the weidment after the final heat treatment
(6) Verification of weld quality after final heat treatment
Keep adding in.
(1) Verification of preheat, interpass, and postweld heat treat temperatures
(2) Verification of surface cleanliness prior to preheating, welding, and postweld heat treating
(3) Calibration of temperature indicating and measuring devices and monitoring of their correct placement
(4) Monitoring the postweld beat treating operation to assure that the procedure requirements have been met
(5) Verification of the dimensional accuracy of the weidment after the final heat treatment
(6) Verification of weld quality after final heat treatment
Keep adding in.