(1) Before repair, the causes of steel pipe defects should be analyzed and corresponding repair measures should be proposed.
(2) When reworked steel pipes require repair welding, qualified welding processes should be used and welded by qualified welders.
(3) When the number of repairs for the same part exceeds 2 times, the repair measures should be re-established, and repairs can only be carried out after approval by the technical chief of the welding unit.
(4) After repair, it should be re-inspected and recorded in the technical delivery documents together with the repair and inspection records.
(5) Pipes requiring post-weld heat treatment should be reworked before heat treatment. If the weld is reworked after heat treatment, heat treatment should be performed again after rework.
Post time: Oct-24-2023