Polyurethane thermal insulation steel pipe has excellent characteristics such as high-efficiency thermal insulation, waterproof, anti-corrosion, thermal insulation, sound insulation, flame retardant, cold resistance, anti-corrosion, light capacity, high strength, simple and fast construction, and not afraid of plant roots. It has become an indispensable material for thermal insulation, waterproof plugging and sealing in industrial departments such as construction, transportation, petroleum, chemical industry, electric power and refrigeration. Polyurethane thermal insulation steel pipe is used for indoor and outdoor pipelines, central heating pipelines, central air conditioning pipelines, chemical industries, and other industrial pipelines, such as thermal insulation, cold insulation projects, oil pipeline projects, steam and other pipeline projects. Polyurethane thermal insulation steel pipe can be directly buried in 0.6-1.2 meters of permafrost. The heat loss can be reduced by more than 40% compared with ordinary pipelines. The working life is 3-5 times higher than that of other thermal insulation and anti-corrosion materials, and the service life can reach 30-50 years.

Application of solvent, emulsion cleaning steel surface, in order to remove oil, grease, dust, smooth agent and similar organic matter, but it can not remove the appearance of steel rust, oxide skin, welding flux, etc., so in the anti-corrosion production only as an auxiliary trick.