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API 620 crude oil storage tank design manhole frame

API 620 crude oil storage tank design manhole frame

API 620 crude oil storage tank design manhole frame

Before pressure test, the main drain hose system of API 650 petroleum storage tank floating roof should be thoroughly flushed. Provide blind flanges, gaskets and bolts required for the API 620 crude oil storage tank design test (other types of covers are also required if necessary). Covers for maintenance shall be provided in accordance with the interfaces specified by API 650 petroleum storage tanks, and these seals shall remain in place after the test; and for those interfaces that are not provided for maintenance covers, the covers can be removed after the API 620 crude oil storage tank design test.

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Corrosion of the API 620 crude oil storage tank design body caused by external conditions such as high temperature, rain, humidity, or inadequate anti-corrosion measures of the oil storage tank itself, the water-bearing deposits in the oil storage tank caused corrosion and perforation of the inner surface of the oil storage tank bottom plate. Defects fatigue cracks caused by stress, with the accumulation of time, the compressive strength of the API 620 crude oil storage tank design body decreases and corrosion cracks occur.

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