1. Because the plate is thin, it is easy to produce welding deformation. Long welds are prone to wave-like deformation. Therefore, the welding process must be strictly followed during welding, especially the welding current must be strictly controlled. (To ensure penetration, use as small a welding current as possible) and welding sequence. The welder should check the offset of the groove before welding. Welding can only be carried out after the offset is qualified. For girth welds of tanks with larger diameters, try to weld symmetrically and segmentally.

2. The back side of all manual argon arc welding seams must be protected with Ar. For spot welds (especially prone to lack of fusion and incomplete penetration), the welding requirements are the same as those of welds, and welding should be as thorough as possible in one go, otherwise it should be polished before welding. If the tank has a large volume, you can first fill the tank with a portion of water according to the diagram and then inflate it to save argon.

3. For parts of the tank without manholes, try to weld the accessories that require double-sided welding or gas protection on the back (such as pipes and pads, etc.) before welding the seams. .

4. When welding accessories on the shell, such as lifting lugs, pads and support bars, they should be welded according to the minimum welding leg size. Try to water the back of the welding seam during welding to reduce deformation.

5. When there are many accessories welded on the shell, spot welding should be performed first and then the welding, and the reinforcing ribs should be welded as appropriate.

6. When removing the arc ignition, arc retreat plates and reinforcing ribs, use plasma or grinding wheel cutting, and do not knock them off with force.