Polyurethane insulated foamed steel pipe has excellent characteristics such as light bulk density, high strength, insulation, sound insulation, flame retardant, cold resistance, corrosion resistance, non-absorption of water, simple and quick construction, etc. It has become an indispensable material for insulation, waterproof plugging, sealing, etc. in the construction, transportation, petroleum, chemical, electric power, refrigeration and other industrial departments.

1.Low thermal conductivity: The thermal conductivity of polyurethane foam is the highest among insulation materials, so it can reduce the heat loss of materials to a minimum

2. Waterproof, anti-corrosion, and aging-resistant. Since the closed-cell rate of polyurethane foam is over 92%, using polyurethane foam as the insulation layer of the direct buried pipeline can not only play a role in insulation, but also effectively prevent the penetration of water, moisture, and other corrosive liquids and gases, and prevent the growth and development of microorganisms.

Polyurethane Insulation Foam Steel Pipe

The polyurethane insulation foam steel pipe has a three-layer structure from the inside to the outside:

First layer: Working steel pipe layer: seamless steel pipes, spiral steel pipes and straight seam steel pipes are generally selected according to the design and customer requirements. After the surface of the steel pipe is treated with advanced shot blasting and rust removal technology, the rust removal grade of the steel pipe can reach the Sa2 level in the GB/T8923-1988 standard, and the surface roughness can reach R=12.5 microns in the GB6060.5-88 standard.

Second layer: Polyurethane insulation layer: It is made by injecting rigid polyurethane foam stock solution into the cavity formed between the steel pipe and the outer sheath at one time using a high-pressure foaming machine, which is commonly known as "tube-in-tube foaming".

Third layer: high-density polyethylene protective layer: premade into black or yellow polyethylene plastic pipes with a certain wall thickness. Polyethylene is odorless, non-toxic, feels like wax, has excellent low-temperature resistance, and the lowest operating temperature can reach -70~-100°C. It has good chemical stability and is resistant to erosion by most acids (not resistant to oxidation). acid), it is insoluble in general solvents at room temperature and has low water absorption. However, as it is a linear molecule. It can be slowly soluble in some organic solvents without swelling and has excellent electrical insulation properties.