PU foam thermal insulation coating of steel pipe is made of polyether polyol composition and methyl polyphenyl polyisocyanate through chemical reaction and foaming.Polyurethane thermal insulation pipe is used in various indoor and outdoor pipelines, central heating pipelines, central air conditioning pipelines, chemical, pharmaceutical and other industrial pipeline insulation, cooling engineering.Overview of polyurethane foam insulation tube polyurethane synthetic materials, it has been as a kind of excellent heat insulation material and got rapid development, its application scope also more and more widely, more because its construction is simple and remarkable energy-saving anti-corrosion effect and is widely used in all kinds of steel line pipes such as heating, refrigeration, oil, steam, etc.
Main components of polyurethane thermal insulation steel pipe:
I.Protective case: high density polyethylene(HDPE) or glass fiber reinforced plastics.
II.Insulation layer: rigid polyurethane foam
III.Working steel tubes: welded steel tubes, seamless steel tubes and double-sided submerged arc spiral welded steel tubes shall be used according to the technical requirements of the conveying medium.
IV.leakage alarm line: manufacturing high temperature, the prefabricated directly buried insulating pipe are close to the steel pipe insulation, embedding a warning line, once the pipeline leakage somewhere, conduction through the warning line, can be on the special detecting instrument alarm and show the leaking of accurate location and the size of the degree of leakage, in order to inform the maintenance staff quickly deal with a leaky pipe section, to ensure the safe operation of the heat supply network.
There are three kinds of laying methods: directly buried, overhead and trench.
We have accumulated a lot of rich experience in the long-term polyurethane insulation and thermal insulation construction of pipe fittings, whose quality has reached the national and international standards, and won the trust and praise of the majority of customers.
Polyurethane thermal insulation steel pipe, with the advantages of light bulk, high strength, thermal insulation, sound insulation, flame retardant, cold resistance, corrosion resistance, non-water absorption, simple and fast construction as well as other excellent characteristics, has become the construction, transportation, petroleum, chemical industry, electric power, refrigeration and other industrial sectors thermal insulation, waterproof plugging, sealing and other indispensable materials.
Small thermal conductivity:
The thermal conductivity of polyurethane foam is the lowest in the thermal insulation materials, so it can reduce the heat loss of materials to the minimum.
Waterproof, anticorrosive, aging resistant:
Due to the closed pore ratio of polyurethane foam is more than 92%, the use of polyurethane foam as the insulation layer of directly buried pipelines can not only play a role in heat preservation and insulation, but also effectively prevent the infiltration of water, moisture and other corrosive liquids and gases, and prevent the growth and development of microorganisms.
Polyurethane insulation pipe is popular because of its excellent performance, convenient construction and long service life.
Related standards for polyurethane insulation pipes is CJ/T114 <High Density Polyethylene Outer Protective Pipes Polyurethane Foam Prefabricated Directly Buried Insulation Pipes Standard> or EN253 <Integrated Precast Insulation System for Underground Water Heat Pipe Network Consisting of Working Steel Tubes, Polyurethane Insulation Layer and Polyethylene Outer Casing Insulation Pipes>.