Bending and Straightening
1. Minor deviations in dimensions shall be corrected before heat treatment.
2. Small residual deviations remaining after heat treatment may only be corrected by cold straightening, after obtaining the consent of the Company Inspector. Hot straightening after heat treatment is not permitted (except nonpressure attachments).
3. Piping bends, when shown on the piping drawings, shall indicate the required bend radius. Wall thickness shall be in accordance with ASME B31.3. Do not thin the pipe wall to less than the minimum required thickness.
4. Bending procedure shall be submitted for Company approval prior to start of fabrication.
5. Completed bends shall be free from harmful defects and in accordance with ASME B31.3, Paragraph 332.
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