CSA G40.21 Gr 44WT plates API standard 650 flat-bottom steel tanks

The preparatory work before the construction of the API standard 650 flat-bottom steel tanks is an important part of the oil tank project. Material purchase preparation before the construction of the API standard 650 flat-bottom steel tanks:
Before API standard 650 flat-bottom steel tanks construction, all materials shall be purchased and prepared, and the specifications and quality of materials shall be inspected to see if they meet the construction operation requirements. Fire and rain proof measures should be taken when storing materials. Paint should be stored in a ventilated and dry place.

Testing the Outer Tank: While the test pressure is being held, all welded seams and connections in the outer shell and roof shall be thoroughly inspected with a solution film unless they were previously checked with a vacuum box. The API standard 650 flat-bottom steel tanks air pressure shall be released. Pressure relief and vacuum relief valves shall be checked by applying the design gas pressure to the outer tank, followed by evacuation of the outer space to the vacuum setting of the relief valve.

API 650 Tanks in which liquid fluids are stored and designed to withstand atmospheric pressure operation, less than 18 kPa, or internal pressures not exceeding the weight of the API standard 650 flat-bottom steel tanks roof, with temperatures no higher than 93, 3 C are included in the scope of this design code.