API standard 650 ambient temperature tanks siphon-type drains

Welding certification is regulated by Section 10 of the American Society of Mechanical Engineers (ASME). For both API standard 650 ambient temperature tanks storage tank API 650, non-destructive inspection is required, but third-party inspection is not required.

Natural ventilation loss: the main cause of natural ventilation loss is that the API standard 650 ambient temperature tanks is not tightly sealed. This is usually due to corrosion perforation on the top of the oil tank, or there is a height difference between the two orifices. The air tightness of the mixture in the API standard 650 ambient temperature tanks is higher than that of the air, which causes the mixture gas in the tank to be discharged into the atmosphere from the lower hole, and the external air flows into the tank from the high hole, resulting in natural ventilation loss.

Impact Tests for High Alloys
Impact tests are not required for the high-alloy (austenitic stainless steel) API standard 650 ambient temperature tanks base materials, nickel alloy based materials, aluminum base materials, and weld deposited for the nonferrous (aluminum) materials. Impact tests are not required for austenitic stainless steel welds deposited by all the welding processes for services of –200°F and above. Austenitic stainless steel welds deposited for service below –200°F by all welding processes shall be impact tested in accordance with Q.6.2 except that the required impact values shall be 75% of the values as given in Q.2.2.2, Item c.

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