API Std 650 aboveground steel oil storage tanks ladders
Under the same sealing effect, the internal API Std 650 aboveground steel oil storage tanks floating roof API 650 tank can further reduce the evaporation loss compared with the external floating roof API 650 tank. This is due to the shielding of the fixed roof and the gas phase layer between the fixed roof and the inner floating plate, which has more significant heat insulation effect than the double disc floating roof of the API Std 650 aboveground steel oil storage tanks external floating roof tank.
The thickness of the API Std 650 aboveground steel oil storage tanks annular bottom plates shall be in accordance with Table Q-4 (for steel or aluminum, as applicable). The thicknesses shown are minimums. The ring of annual plates shall have a circular outside circumference, but it may have a regular polygonal shape inside the tank shell with the number of sides equal to the number of annular plates. These pieces shall be butt-welded in accordance with Q.7.1.1, Item b. The plates of the first shell course shall be attached to the annular bottom plates by a weld as required by API 620 oil tank 5.9.5 except when a full-penetration weld is used or required (see Q.7.1.1). Butt-welds in annular plates shall be not closer than 12 in. from any vertical weld.
Proper use of API Std 650 aboveground steel oil storage tanks and precautions:1. The API Std 650 aboveground steel oil storage tanks must be used within the safe height range;2. Check before use to ensure that the safety valve and breathing valve are flexible and easy to use;3. The explosion-proof and fire-proof safety measures for oil tanks are implemented effectively;4. The oil level in the API Std 650 aboveground steel oil storage tanks should be accurately measured when receiving and delivering oil, so as to prevent overflow or empty;5. In the process of receiving and sending oil, the flow rate of oil should be controlled, and it should not be too fast to avoid electrostatic accidents.
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