A537 class 2 plates API 650 SUG III tanks

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

API 620 crude oil tank piping materials made according to ASTM A333 and A350 may be used at API 650 SUG III tanks design metal temperatures no lower than the impact test temperature required by the ASTM specification for the applicable material grade without additional impact tests. For temperatures below those allowed by the ASTM specification, the following paragraph shall apply.

Application scope of API 650 petroleum storage tank:
1. API 650 SUG III tanks Working pressure: atmospheric storage tank;
2. API 650 petroleum storage tank working temperature: -30℃～150℃;
3. API 650 petroleum storage tank liquid medium: various oil products, including naphtha, gasoline, diesel, kerosene, crude oil, fuel oil, heavy oil, benzene, xylene, methanol, ethanol;
4. API 650 petroleum storage tank volume: current design considerations generally do not exceed 10,000 cubic meters.