What are the operational details of polyurethane buried insulation pipes

In piping systems, elbows are fittings that change the direction of the pipeline. According to the angle, there are three commonly used types, and according to engineering needs, there are also other abnormal angle elbows. The materials for elbows include cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, non-ferrous metals, and plastics. The methods of connecting with pipes include: direct welding, commonly used flange connection, hot melt connection, electric melt connection, threaded connection, and socket connection. According to the production process, it can be divided into welded elbows, stamped elbows, cast elbows, etc. Other names: Degree Bend, Right Angle Bend, Love Bend, etc.

(1) Prefabricated polyurethane direct buried insulation steel pipe working steel pipe: according to the technical requirements of the conveying medium, seamless steel pipe, double-sided buried arc spiral welded steel pipe are used respectively.

(2) Prefabricated polyurethane directly buried thermal insulation steel pipe insulation layer: rigid polyurethane foam plastic is used. (3) Prefabricated polyurethane buried insulation steel pipe protective shell: made of high-density polyethylene or fiberglass.

(4) Prefabricated polyurethane direct buried insulation steel pipe leakage alarm line: When manufacturing high-temperature prefabricated direct buried insulation pipes, an alarm line is buried in the insulation layer near the steel pipe. Once a leakage occurs in a certain part of the pipeline, through the conduction of the alarm line, it can be alerted on a dedicated detection instrument and display the accurate location and degree of leakage, so as to notify maintenance personnel to quickly deal with the leaking pipe section and ensure the safe operation of the heating network.

Prefabricated polyurethane directly buried insulation pipe, also known as "pipe in pipe", is composed of "two-step method", which is composed of high-density polyethylene outer protective layer, polyurethane rigid foam plastic pipe and steel pipe.