There are several major steps in the production process of storage tanks. First, let’s take a look at the inner cylinder head in the first step, which is as follows:

1. The steel plate will be re-inspected as required when entering the factory.

2. The process provides the processing drawings of the outer inner cylinder head.

3. The blanking size of the head is in accordance with the requirements of the spinning head factory.

4. Scribing, blanking, plasma cutting, bevel processing (4mm blunt edge, 30 degree bevel) of the head plate, manual welding spot fixation on the back of the assembly (electrode Ao 107).

5. Submerged arc welding, welding wire H0Cr21Ni10, flux 260. The back is protected by a longitudinal flux pad, the back is carbon arc gouged to clean the roots and the metal luster is polished with an angle grinding wheel, and the back is welded by submerged arc welding.

6. Spin the head according to the requirements of the drawings, and process the grooves as required.

7. After the head is spinning, 100% radiographic inspection is carried out on the weld, and it is Class II qualified.

8. Scribe lines on the right head and make holes according to the pipe (plasma cutting). The hole position should avoid the welding seam and the distance is not less than 100mm. Grind the groove with a grinding wheel and a grinding head, set the transition pipe, and argon arc welding point. Solid, welded on both sides with full penetration, welding wire H0Cr21Ni10. 100% color inspection of welds after welding.

9. The left head is the final closing weld of the inner cylinder. The left head and the lining plate are paired, the argon arc welding spot is fixed welding, the lining plate and the head side are argon arc welding intermittent welding, welding 100 breaks 80, the lining plate and the head groove are self-fluxing sealing welding with argon arc welding .

10. After degreasing the surface of the left and right heads, they will be paired.

11. Strict process discipline.