The heat loss of polyurethane foam insulation steel pipe is only 25% of that of traditional pipe material. Long term operation can save a lot of energy and significantly reduce energy cost

Polyurethane foam thermal insulation steel pipe has strong water-proof and corrosion-resistant ability. It can be directly buried in the ground or water without the pipe trench. The construction is simple and rapid, and the comprehensive cost is low.

Polyurethane foam insulation steel pipe also has good corrosion resistance and impact resistance at low temperature, which can be directly buried in the frozen soil.

The correct installation and use of polyurethane foam insulation steel pipe can reduce the maintenance cost of pipe network.

The alarm system can be set up for polyurethane anticorrosive and thermal insulation steel pipe, which can automatically detect the leakage fault of pipe network, accurately indicate the fault location and automatically alarm.

The anti-corrosion and thermal insulation method of polyurethane foam insulation spiral steel pipe can be overhead or buried underground, and the whole construction process can be carried out on site, which is convenient for construction and operation, and is easy to be controlled by construction personnel, and the process is relatively simple.

The porosity structure of rigid polyurethane foam material is stable and basically closed, which not only has excellent heat preservation performance, but also has good freeze-thaw resistance and sound absorption.

Under the condition of normal use and maintenance, the average life of cast-in-situ polyurethane rigid foam insulation structure can reach more than 25 years.

All kinds of component materials of polyurethane rigid foam insulation system have chemical and physical stability.

Technical standard for buried polyurethane insulation steel pipe:

"High density polyethylene external protective tube rigid polyurethane foam prefabricated directly buried insulation pipe and fittings" GB/T 29047-2012 "urban heating prefabricated directly buried insulation pipe technical index detection method" GB/T 29046-2012

What is polyurethane heat preservation pipe

The thermal polyurethane direct buried thermal insulation pipeline is mainly composed of three layers of structure, one is a protective shell made of high-density polyethylene or fiberglass reinforced plastics, one is a thermal insulation layer made of rigid polyurethane foam, and one is a working steel pipe. The working steel pipe can adopt seamless steel pipe, seamless steel pipe and double-sided submerged arc welded pipe separately according to the requirements of medium transportation.

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The field joint insulation of polyurethane insulation seamless steel pipe must be carried out after the test pressure is qualified.

This work is necessary for the construction of polyurethane directly buried insulation pipe. The construction quality directly affects the service life. There are two methods of foam construction and insulation tile construction for insulation layer. No matter which method is adopted, the defects such as annular space, cracking and delamination can not appear.

There are many methods for maintenance layer, but the integrity and tightness of joints should be ensured.