Polyurethane insulation tube

High-density polyethylene plastic sheathed polyurethane foam, good thermal insulation material should have low thermal conductivity; it will not deteriorate when wet, has good heat resistance, does not corrode metals, is lightweight and has many voids; has certain mechanical strength, No damage when exposed to external force; easy processing, low cost and other characteristics

High temperature is composed of steel tube, glass fiber reinforced plastic inner sheath, glass fiber reinforced plastic shell, which is characterized by: it also includes high temperature resistant heat insulation layer, lubricating layer, elastic seals. The utility model effectively solves the problems of insulation, sliding lubrication and waterproofing of the pipe end of the prefabricated direct buried insulation pipe for high-temperature heat transmission of 130 ℃-600 ℃ in the central heating of large cities and towns. ?

Is mainly composed of four parts.

(1) Working steel pipe: According to the technical requirements of the conveying medium, respectively adopt seam steel pipe, seamless steel pipe, double-sided submerged arc spiral welded steel pipe.

(2) Insulation layer: rigid polyurethane foam is used.

(3) Protective shell: high-density polyethylene or glass steel.

(4) Leakage alarm line: At the time of manufacture, an alarm line is buried in the thermal insulation layer near the steel pipe. Once leakage occurs somewhere in the pipeline, through the conduction of the line, a special detection instrument can be used to alarm and display the leak The exact location and the size of the leakage degree are to inform the maintenance personnel to quickly deal with the leaking pipe section to ensure the safe operation of the heating network.