129、production process of storage tank (8) -凯时登录

 129、production process of storage tank (8) -凯时登录

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129、production process of storage tank (8) - doer equipment

classification:industry publishtime:2020-03-03 15:50:35

production process of storage tank (8)

from the beginning of production to the completion of production, the process of lng storage tank is complex and takes a long time. each process must be strictly operated, without any carelessness, otherwise the whole storage tank may not be used. from the following:

1) first group 3 cylinder sections to ensure that the long arm submerged arc welding machine can weld.

2) use the cylinder assembly tooling to assemble the cylinder section, and the outer side is fixed by manual welding.

3) the inner side is submerged arc welded, the outer side is carbon arc gouged and polished with grinding wheel, and the outer side is submerged arc welded.

4) after welding, 3 to 4 circumferential weld support fixtures can be removed, but both ends of the circumferential weld support fixture must be retained.

5) in the future, each group can weld one section of cylinder or two sections of cylinder, provided that long arm submerged arc welding can be carried out.

6) by analogy, the final cylinder body is said to maintain 6 circumferential welding support fixture.

7) the surface of all welds shall be ground, and 20% of the welds shall be qualified for grade iii radiographic inspection.

8) after the flaw detection is qualified, the reinforcing ring is assembled, the mixed gas shielded welding is used to fix the spot, the mixed gas shielded welding is used to weld, the intermittent welding is used to weld 100, and the 80 is broken.

9) cylinder marking, nozzle opening, the opening position should avoid the weld, the distance should not be less than 100 mm, grinding groove with grinding wheel and grinding head, assembling explosion-proof device nozzle and perlite filling tooling, manual arc welding, manual welding, welding wire h10mn2.

10) the inner surface of the outer cylinder must be sandblasted before assembly.

11) assemble and weld the lifting lug of the transverse tension belt, and assemble the transverse tension belt.

12) group welding explosion-proof device, group welding perlite filling hole, group welding transverse connecting process hole.

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