API standard 650 ambient temperature tanks foundations for leak detection

The construction period comparison of mechanical cleaning and manual cleaning for vertical storage tank, API standard 650 ambient temperature tanks. The API standard 650 ambient temperature tanks mechanical cleaning period is short, and the construction period is not affected by the size of the storage tank and the amount of sludge in the tank, and the cleaning equipment operates 24 hours a day. The manual cleaning of the API standard 650 ambient temperature tanks has a long construction period, which is easily affected by the external environment, and the number of workers is limited by the size of the storage tank and the amount of sludge.

Large Low-Pressure Tanks Corrosion Allowance
In cases in which the rate of corrosion is closely predictable, additional metal thickness over and above that required for the initial operating conditions shall be provided and shall be at least equal to the expected corrosion loss during the desired life of the tank.
When corrosion effects are indeterminate before the tank is designed (although they are known to be inherent to some degree in the service for which the tank is to be used), and when corrosion is incidental, localized, or variable in rate and extent, the best judgement of the API standard 650 ambient temperature tanks designer must be exercised in establishing reasonable maximum excess tank wall thicknesses. For all tanks that come under this classification, a minimum corrosion allowance of 1/16 in. shall be provided.

The internal floating plate of internal floating roof tank of API 650 tank is different from that of open floating plate of API standard 650 ambient temperature tanks External floating roof tank of API 650 tank, so it is impossible to have rain and snow load.

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