Quality inspection of API 650 self-anchored flat-bottom tanks

Unqualified welding quality of API 650 self-anchored flat-bottom tanks is prone to hidden dangers such as oil tank steel plate cracks and leakage. To avoid this situation as much as possible, it needs to be avoided when the oil storage tank is manufactured. Scientific and reasonable measures are adopted to control the welding quality when welding the API 650 self-anchored flat-bottom tanks. How to reasonably control the welding process quality of oil storage tanks?

The horizontal projection of the roof plate within the compression-ring region is 4.9 x 0.866 = 4.25 in., which fulfills the requirement of API 620 tank standard 5.12.5.1. The required area and horizontal projection can be provided by any of the standard angles listed in Table F-3.
Any of these angles may be used in accordance with the details of Figure 5-6, detail a or b, but if details c, h, or i in Figure 5-6 were intended, the net area of the angle must be calculated by deducting the area expected to be lost by corrosion from that part of the angle surface that is exposed to the interior of the tank.

Lateral braces between outer bay rafters must be provided if asymmetrical structural shapes are used for rafters and if the API 650 self-anchored flat-bottom tanks API 650 tanks are located in areas subject to earthquakes. The bracing must be adequately sized for the seismic zone specified.

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BBN steel strictly control quality of our carbon steel plate, alloy steel plates and structural steel plates. For API 650 self-anchored flat-bottom tanks ASTM A572 Grade 50 structural steel plate, Our Q/C Department will inspect dimension before shipment, making sure structural steel plate thickness tolerance and width, length tolerance are matchable to the API 650 self-anchored flat-bottom tanks standard requirements. The company is a good ASTM A572 Grade 50 structural steel plate supplier in the globle market and the head is located in China. Welcome to send us inquiry and questions about structural steel plate.