API 650 liquid-storage tanks examiner

The floating roof is the top cover floating on the liquid level, so the sealing performance of API 650 liquid-storage tanks API 650 oil storage tank is very important. The floating plate mainly adopts elastic packing, and at the same time, it is compressed with the wall of API 650 oil storage tank with pressure strip around, and fixed with the floating plate with bolts. After the API 650 liquid-storage tanks floating plate is lowered to a certain position of about 1.8m, a prop will support the floating plate to keep it in position.

Production Weld Tests
Production weld test plates shall be welded for API 650 liquid-storage tanks primary-component butt-welded shell plates when welding procedure qualifications are required to be impact tested per Q.6.2 and Q.6.3. The number of production weld tests shall be based on the requirements of Q.6.6.3 and Q.6.6.4. The locations impact tested (i.e., HAZ and/or weld deposits) shall likewise be the same as required for weld procedure qualifications per Q.6.2 and Q.6.3. Weld testing shall be in accordance with Q.6.6.5. Test plates shall be made from plates produced only from the heats that are used to produce the shell plates for the large welded steel tank.

Unqualified welding quality of API 650 liquid-storage tanks is prone to hidden dangers such as oil tank steel plate cracks and leakage. To avoid this situation as much as possible, it needs to be avoided when the oil storage tank is manufactured. Scientific and reasonable measures are adopted to control the welding quality when welding the API 650 liquid-storage tanks. How to reasonably control the welding process quality of oil storage tanks?

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