Kongwang steel strip heat-resistant polyethylene prefabricated insulated pipe is a new type of heating pipe. It consists of a working pipe (including fittings), a rigid polyurethane foam insulation layer, and a polyethylene protective shell tightly combined. Because the three become one, buried directly in the soil, the thermal expansion stress caused by the temperature change of the inner pipe is transferred to the outer protective pipe through the polyurethane insulation layer, and the soil friction force on the outer protective pipe is also transferred to the working pipe through the polyurethane insulation layer, using the soil friction force to limit the thermal expansion of the pipe. This requires the polyurethane to have not only insulation function but also a certain compressive and shear strength.
The anti-static and flame-retardant components of polyethylene pipes used underground in coal mines are uniformly distributed throughout the pipe body, so the anti-static and flame-retardant performance indicators will not be affected by long-term use. The anti-static and flame-retardant properties meet national standards and are suitable for flammable and explosive environments underground.
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Fuqing Yuanhong Investment Zone, Fujian Province
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