Q. Inspection of Flange assembly?
Flanges shall be clean and free of old gasket fragments, scratches, burrs, pits, etc. if needed, the flange surfaces shall be cleaned with a scraper and/or a wire brush (stainless steel wire brush if the flange is austenitic).
A straight edge shall be used to check the flange face for warpage. Warped flanges or flanges with deep scratches or dents shall be re-faced or replaced.