A334 grade 1 pipe API Std 650 anchored liquid-storage tanks

As we know, the vertical metal tank, API Std 650 anchored liquid-storage tanks is welded by many components, and the welding quality of each component determines the later use effect of the API Std 650 anchored liquid-storage tanks. Professional API Std 650 anchored liquid-storage tanks manufacturers should have a set of professional skills in the welding process of API Std 650 anchored liquid-storage tanks. Key points for weld inspection of vertical metal tank, API Std 650 anchored liquid-storage tanks:
1. It is strictly forbidden to paint the welds before passing the inspection.
2. Visual inspection shall be carried out for welds.
3. NDT shall be carried out on the weld.

The API Std 650 anchored liquid-storage tanks stiffener ring and backing strip (if used) are primary components, and they shall comply with the requirements of API 620 storage steel tank Q.2.1. The stiffener rings may be fabricated from plate using an intermittent weld on alternating sides between the web and the flange.
Except for aluminum or stainless steel tanks, all fillet welds shall consist of a minimum of two passes. The ends of the fillet welds shall be 2 in. from the rat hole (see Figure Q-1), and these welds shall be deposited by starting 2 in. from the rat hole and welding away from the rat hole. An acceptable alternative to the detail that includes stopping fillet welds 2 in. short of the rat hole would be to weld continuously through the rat hole from one side of the stiffener to the opposite side. All craters in fillet welds shall be repaired by back welding.

The floating roof is the top cover floating on the liquid level, so the sealing performance of API Std 650 anchored liquid-storage tanks API 650 oil storage tank is very important. The floating plate mainly adopts elastic packing, and at the same time, it is compressed with the wall of API 650 oil storage tank with pressure strip around, and fixed with the floating plate with bolts. After the API Std 650 anchored liquid-storage tanks floating plate is lowered to a certain position of about 1.8m, a prop will support the floating plate to keep it in position.

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