Repair Of Damaged Surface Of Anti-corrosion Spiral Steel Pipe

After the surface is mechanically damaged, the anti-corrosion spiral steel pipe must be repaired. When the scratches do not cause leakage, the two circular fillet welds between the casing and the steel pipe body do not need to be welded. If it leaks, it needs to be welded. The sleeve is directly subjected to the internal pressure caused by the liquid, therefore, in this case the thickness of the sleeve is usually not less than the wall thickness of the pipe.

For surface mechanical damage, it is usually repaired by casing. The sleeve consists of two parts with two longitudinal seams welded from two laths. This has the advantage that there are no welds on the body of the steel pipe. The longitudinal seams are lined butt welds, and the pipe itself becomes the lining of the upper and lower casings.

Widely used in fluid transportation in urban construction water supply, fire protection, petroleum, gas, chemical industry, sewage, mining, agricultural irrigation and other fields, to replace cast pipes and steel pipes with high energy consumption, easy to rust, fouling, short life, and heavy transportation other traditional pipes

Production process of epoxy resin composite steel pipe coated inside and outside

The inner and outer epoxy resin steel pipes are first pretreated and polished to the base pipe (galvanized steel pipe). Automatic spraying makes the coating on the inner and outer walls of the substrate uniform and has good leveling. Put it into the curing box for curing (keep it for 15 minutes when the temperature reaches 200 degrees)

After the finished product is sprayed, the heating equipment is preheated to 180 degrees to cure the sprayed substrate. When spraying, the epoxy resin powder has not been completely fused to the inner and outer walls of the substrate. After 30 minutes of preheating and curing, the epoxy resin The curing agent inside is completely cured, making the coating adhesion on the inner and outer walls stronger.

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