API standard 650 low-alloy steel tanks impulsive spectral acceleration parameter

Design of a Double-wall Tank
The outer bottom, shell, and roof of a double-wall tank shall enclose an insulating space around the bottom, shell, and roof or insulation deck of the inner tank that contains the stored liquid. The annular space shall be maintained at a low positive pressure, which necessitates that the enclosure be vapor-tight. The Purchaser shall specify the design metal temperature and pressure of the inner tank and may specify the design temperature and pressure of the outer tank API standard 650 low-alloy steel tanks. The Purchaser shall state the specific gravity of the content to be stored, roof live loads, wind load, earthquake load where applicable, and corrosion allowance, if any.

While GB50341 generally takes the weld coefficient as 0.9;When the minimum yield strength of API standard 650 low-alloy steel tanks steel plate is greater than 390 MPa, take 0.85. The thickness of API 650 tanks is generally smaller than that of GB50341, and this difference is particularly evident in the design of large tanks, where the overall weight of the tanks varies greatly.

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The water dissolved in the oil will be separated out from the oil stored in the API standard 650 low-alloy steel tanks for a long time, and the acidic water layer will appear at the bottom of the API standard 650 low-alloy steel tanks for a long time, which will accelerate the corrosion of the API standard 650 low-alloy steel tanks and cause the wall thinning and even leakage. With the increase of service life, the API standard 650 low-alloy steel tanks must be inspected and cleaned regularly to check the hidden danger.

The 365 day service system is implemented, and the business, loading and delivery are handled as usual in holidays and festivals. Actively help users solve difficulties. When users encounter difficulties in handling business, they should actively coordinate with the external solution; if they need to solve the problems internally, they should solve them in a timely manner without prevarication and wrangling. In line with the API standard 650 low-alloy steel tanks principle of "fairness, justice and timeliness", coordinate with relevant departments and deal with all kinds of objections in a timely manner.