API Std 650 duplex stainless steel tanks annular bottom plates

Suggested Practice Regarding Installation of Low-pressure storage tanks
Access: All openings and accessories for tanks API Std 650 duplex stainless steel tanks constructed according to this standard shall be installed so that any periodic inspections required can be readily made.
Corrosion: When a tank bottom rests directly on the ground, a survey shall be made to establish the need for cathodic protection.
Drainage: All tanks in which water might accumulate under the hydrocarbon contents shall be provided with adequate drains that are suitably protected from freezing.

The application of API 650 is as stated by the American Petroleum Institute: The production and installation of our ground welded steel API Std 650 duplex stainless steel tanks storage tanks are generally used in industry; under normal circumstances, the storage tanks installed on the industrial site in the United States are in accordance with API 650, API 620 and API 12d Standards are established.

The establishment of a correct method for evaluating the life of API Std 650 duplex stainless steel tanks requires the preparation of criteria related to the strength and cracks of API Std 650 duplex stainless steel tanks, mechanical damage mechanisms, corrosion mechanisms, and mathematical models of fatigue crack growth, etc., which are compiled into computer programs. In the process of programming the program, it is required to select the operating parameters, plates, reinforcement accessories, metal properties, corrosion levels, mechanical damage defects and other data of the oil storage tank under various conditions.