API 653 - (9.10) REPAIR OF TANK BOTTOMS QUESTIONS AND 100% CORRECT ANSWERS 2025/2026

API 653 - (9.10) REPAIR OF TANK BOTTOMS QUESTIONS AND 100% CORRECT ANSWERS 2025/2026 dishing settlement - Answer -*General Repair Req* Welded-on patch plates shall not be placed over areas of the tank bottom that have global or local _____ [except as allowed by 9.10.1.1 d)], _______, or distortion greater than the limits of Annex B. 12 1/4 bottom 3/8 - Answer -A welded-on patch plate may be placed over a mechanical dent or local dishing if: 1. Its unsupported dimension does not exceed __ in. in any direction; 2. It is at least ____(fraction) in. thick; 3. It is at least as thick as the existing _____; 4. And does not overlap seams nor other patches, except for tanks designed in accordance with API 650, Annex M, which shall have welded-on patch plates at least ______(fraction) in. thick. 6 seam 2 - Answer -A welded-on patch plat