3PE steel pipe in industry applications, suitable for coal mine underground water supply and drainage, grouting, negative pressure ventilation, gases, fire sprinkler system, thermal power plant process water waste, return water pipelines, communication, highway cable buried pipeline, oil pipeline, chemical industry, pharmaceutical, printing and dyeing, and other corrosive substances. We can say that 3PE anticorrosive steel tube is an indispensable part of industrial construction in China, then how to repair the anticorrosive layer when a 3PE anticorrosive steel tube is installed and the welding site is damaged?

1. less than 30mmx30mm, point, surface, linear, single 3PE damage point repair technical requirements

(1) Remove the dirt at the damaged site and wool the polyethylene layer there.

(2) Trim the polyethylene layer at the injury site smoothly, and the edge should be obtuse Angle. Fill the hole with adhesive matching with the repair piece, and then stick the repair piece. The size of the patch should ensure that its edge is away from the hole edge of the polyethylene layer

Not less than 50mm.

(3) When patching, it should be heated and rolled with a roller or squeezed by hand with a heat-resistant glove to discharge air until the adhesive around the patch spills evenly.

(4) Hot melt adhesive must be used to reinforce and fix the wound pieces around.

2. greater than 30mmx30mm,3PE damage point

At this time, a radiation cross-linked polyethylene thermal shrinkage belt (sleeve) should be used. The selected thermal shrinkage sleeve should be selected according to the diameter of the pipe with matching specifications. The edge of the substrate of the product should be flat, and the surface should be smooth, clean, and free of bubbles, cracks, and discoloration. The circumferential shrinkage of the thermal contraction zone should not be less than 15%; the Circumferential shrinkage of heat-shrinkable sleeves should not be less than 50 percent.

Cangzhou shenlong pipe manufacturing co., ltd. Is engaged in oil, gas, water, coal slurry mixing medium steel pipeline coating operations, anti-corrosion, insulation, piping is set in a body's specialized pipeline engineering precast construction enterprises, products used in an oil pipeline, chemical piping, electrical, pipe, gas pipe, heat pipes, sewage pipes, etc. Anti-corrosion processing of straight pipe and bend pipe DN40-3000 three-layer structure polyolefin (PE, PP, TPEP,3LPE) steel pipe coated with anti-corrosion, DN40-3800 steel hot stewed bend pipe and pipe fittings coated with FBE, epoxy resin coating anti-corrosion, DN40-3800 steel pipe inner wall resistance reduction, solvent-free epoxy steel pipe, epoxy paint anti-corrosion, Coated plastic steel pipe, dip plastic steel pipe. Lined with plastic steel pipe PE, PO, PP, PTFE, HDPE, polymer polyethylene corrosion. The company is in strict accordance with China Petroleum and Natural Gas SY/T0413-2002, national GB/T23257-2009, German DIN 30670, American AWWA C210, and other international and domestic anti-corrosion standards.