API Std 650 aboveground welded storage tanks impact tests

For the welding of API Std 650 aboveground welded storage tanks bottom, attention should be paid to the slag removal and drying of the welding joint before welding, and there is no sediment and oil contamination in the lap joint of steel plate. The manufacturing quality and production efficiency of the central plate can be obviously improved by adopting the rolling central plate. The butt joint is used between the rolling plates to improve the installation conditions of the central plate at the bottom of the API Std 650 aboveground welded storage tanks. The welding sequence of the central plate is from the center of the central plate to the surrounding.

Material for the outer tank API Std 650 aboveground welded storage tanks and for the roof that contains the vaporized liquefied gas but is primarily subjected to atmospheric temperatures may conform to one of the following:
a)Table 4-1 for design metal temperatures down to –35°F (lowest 1-day mean ambient temperature of–35°F) without impact test unless they are required by Table 4-1 or by the Purchaser.
b)Table R-3 for design metal temperatures down to –60°F without impact tests unless they are required by Table R-4 or by the Purchaser.

Before pressure testing, thoroughly flush the API 650 tank floating roof primary drain hose system. Supply API Std 650 aboveground welded storage tanks blind flanges, gaskets, and bolting (for other types of blanking covers as may be required) necessary for testing.

Strengthen system construction. The system itself has a certain binding force, which specifies the rights and obligations of employees. It is a passive management means for employees. Its purpose is to promote each employee to develop good professional habits, form good behavior norms, and promote the improvement of enterprise management level.

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