Composition and production process of LPG storage tank
Time:2022-08-28
Views:109
The tank body of LPG storage tank is made of Q345R special steel plate for class III pressure vessel, with a yield strength of 340mpa. It has good comprehensive mechanical properties, corrosion resistance, high temperature resistance and good cutting performance. The tank body is welded by the cylinder body and the head. According to the volume size, the cylinder body needs to be divided into several sections. The inner circumferential seam must be welded first, and the outer circumferential seam is welded by air gouging. The automatic circumferential seam welder is the quality control point.
1. The use of automatic circumferential welding equipment with excellent technology can ensure the stability of the welding point, and the surface node is uniform and smooth, meeting the process requirements.
2. No cross crossing is allowed for welds. The horizontal distance of longitudinal welds between two cylinder sections shall be greater than 150mm to ensure the safety performance of the tank.
The tank body is composed of front and rear heads and cylinders. Accessories include: liquid level gauge, pressure gauge, temperature gauge, safety valve, emergency shut-off valve, subsea valve, sewage outlet, and liquid outlet valve, which are divided into double liquid outlet and single liquid outlet.
Generally, it is an ordinary ball valve. If all the valves are stainless steel, the price needs to be more than 6000. The single liquid phase inlet and outlet and the single gas phase inlet and outlet are separated from the bottom of the vehicle body and divided into the liquid phase outlet on both sides of the vehicle body.
Design process drawing - steel cutting and blanking - edge planing and beveling - cylinder section rolling and rounding - longitudinal weld welding - circumferential weld welding - X-ray flaw detection - opening of nozzle accessories - welding and magnetic particle flaw detection of flanges and accessories - tank heat treatment - surface sand blowing and derusting - tank surface paint spraying - tank production completed.
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