Thermal insulation pipe is the abbreviation of thermal insulation pipe, thermal insulation pipe for liquid, gas and other media transport, in petroleum, chemical, aerospace, military, central heating, central air conditioning, municipal and other pipeline thermal insulation projects.

Ship engineering (first-level discipline); Offshore Oil and Gas Development Engineering Facilities and Equipment (Secondary Discipline)

Insulation pipeline is widely used in liquid, gas transmission pipe network, chemical pipeline insulation engineering petroleum, chemical industry, central heating network, central air conditioning ventilation pipeline, municipal engineering and so on. High temperature prefabricated direct buried insulation pipe is a kind of direct buried prefabricated insulation pipe with good insulation performance, safety and reliability, and low engineering cost. The problems of thermal insulation, sliding lubrication and waterproofing of exposed pipe end of prefabricated directly buried thermal insulation pipe used for 130℃-600℃ high temperature heat transmission in urban central heating are effectively solved. High temperature prefabricated direct buried insulation pipe not only has advanced technology and practical performance that traditional trench and overhead laying pipes are difficult to match, but also has significant social and economic benefits, and is also a powerful measure for heating energy saving. The high temperature prefabricated direct buried insulation pipe adopts the direct buried heating pipe technology, marking that the development of China’s heating pipe technology has entered a new starting point.

The insulation pipe is composed of steel pipe, glass fiber reinforced plastic inner sheath, glass fiber reinforced plastic shell, which is characterized by: also includes high temperature insulation layer, lubrication layer, elastic seals. The utility model effectively solves the problems of heat preservation, sliding lubrication and waterproofing of the exposed pipe end of the prefabricated directly buried insulation pipe used for high temperature heat transport at 130℃-600℃ in urban central heating.

Constituent part

(1) Working steel pipe: according to the technical requirements of the conveying medium, welded steel pipes, seamless steel pipes, double-sided submerged arc spiral welded steel pipes are used.

(2) Insulation layer: rigid polyurethane foam or aerogel felt.

(3) Protective shell: high-density polyethylene or glass fiber reinforced plastic.

(4) Leakage alarm line: When manufacturing high temperature prefabricated directly buried insulation pipe, there is an alarm line buried in the insulation layer near the steel pipe, once there is leakage somewhere in the pipeline, through the conduction of the alarm line, it can be alarmed on the special detection instrument and show the exact location of the leakage and the size of the leakage degree, so as to notify the maintenance personnel to quickly deal with the leaking pipe segment and ensure the safe operation of the heat network.

Advantages and characteristics

1. Reduce project cost.

According to the estimates of the relevant departments, dual-pipe heating pipes can generally reduce the project cost by 25%(using glass fiber reinforced plastic as a protective layer) and 10%(using high-density polyethylene as a protective layer).

2 Low heat loss, saving energy.