What is the outer skin of polyurethane insulation steel pipe?
Aug 26,2024
Polyurethane insulation steel pipe has two properties of anti-corrosion and waterproof, and is loved by users. Compared with traditional insulation pipes, polyurethane insulation pipes not only occupy less land, fast construction, but also conducive to environmental protection, low heat loss consumption, and many advantages of saving resources.
The outer skin of the polyurethane insulation steel pipe is a high-density polyethylene protective layer, so high-density polyethylene is the raw material made of raw materials to protect the heat pipeline. Polyurethane insulation steel pipe is divided into three layers from inside to outside: working steel pipe layer: seamless pipe, spiral welded pipe and straight welded pipe are usually selected according to design and customer requirements. Polyurethane insulation layer: A high pressure foaming machine is used to inject rigid polyurethane foam into the cavity between the outer protective layer of the steel pipe. One is waterproof, the other is thermal insulation, and the third is to maintain the weight of the heat supply network.
High-density polyethylene protective layer: prefabricated into a certain wall thickness of black (yellow) plastic pipe, its role is to protect the polyurethane insulation layer from mechanical hard objects damage, the second is anti-corrosion and waterproof.
We know that the highly polyethylene protective layer has these characteristics: through the configuration of fixed maintenance and sliding maintenance mechanical compensator, the deformation of the directly buried insulation pipe is standardized and harmonized, and the project damage caused by thermal expansion and cold contraction is prevented; May be useful waterproof, moisture-proof, acid, alkali, salt, oil, and good overall, elegant and generous, fixed shape, structure does not enter water; After configuring the polyurethane foam layer, the insulation layer and the outer protective layer are successfully built as a whole, which deals with the steel erosion problem of the extrusion and directly buried insulation pipe, and the service life can reach 30-50 years, while the traditional insulation raw materials have a short life, usually only between 3-5 years; The polyurethane foam filled in the casing has excellent mechanical properties and thermal insulation properties, and can withstand temperatures of 120 degrees Celsius under normal conditions.
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