API 650 stainless steel storage tanks tank-bottom reinforcing plate

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

Aftershock Level Earthquake (ALE)
This design case shall be applicable only when regulations or project documents specifically require the tank system to be designed or evaluated for aftershocks.
If the outer tank is not designed as a secondary containment (i.e. it serves as vapor barrier and pressure boundary only and is not constructed of API 620 material suitable for the inner tank API 650 stainless steel storage tanks), then no design or evaluation for ALE is required by these provisions for the inner or outer tank.

Generally, external environment corrosion should be considered before design and construction of API 650 stainless steel storage tanks and so on storage tanks. The corrosion on the outer surface of storage tank is often worse than that on the inner surface. Especially in the chemical industry area, there are often acid fog, alkali or salt dust in the atmosphere. These impurities form an active corrosive medium with dew or steam and oxygen in the atmosphere. The corrosion of the external environment of the storage tank shortens the maintenance period of the storage tank, even causes the storage tank to be scrapped in advance, which affects the normal operation of the storage and transportation.

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Steel transportation because of the special material of API 650 stainless steel storage tanks steel, is a metal with "iron" as the main basic element, small volume and large weight, and easy to oxidize and rust when contacting with air and rain water, so there are many precautions in the transportation of steel. There are 11 proverbs for steel transportation: "evenly placed, moisture-proof and rust proof". Our company chooses the logistics aspect to be very rigorous, takes the customer's request as the standard, guarantees the steel product quality.

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