External protective layer: high density polyethylene external protective tube insulation layer: polyurethane rigid foam insulation layer work steel pipe: socket cast iron pipe
The prefabricated directly buried insulation pipe can be directly buried in 0.6-1.2m frozen soil layer, the heat loss can be reduced by more than 40% compared with ordinary pipes, and the service life can be increased by more than 3-5 times compared with other heat insulation and anti-corrosion materials, and the service life can reach 30 years.
The cast iron pipe PE external insulation polyurethane insulation pipe is made up of high density polyethylene outer pipe, polyurethane foam insulation layer and cast iron pipe. Cast iron pipe, a cast iron pipe. The connection between pipe and pipe adopts socket type or flange type interface; according to function, it can be divided into flexible interface and rigid interface. The flexible interface is sealed with rubber ring, which allows a certain limit of rotation angle and displacement, so it has good seismic resistance and sealing performance. Compared with the rigid interface, it is simple and fast to install. According to the different casting methods, the labor intensity is small.