PU Foam Insulated Pipe

The PU foam insulated pipe is usually used in chemical and medical equipment, boiler heating, shipbuilding, as well as for transporting oil, water and natural gas.

There is an insulation layer outside the pipeline of medium or small diameter for hot crude oil transportation or heat supply so as to reduce heat dissipation of pipeline to soil. The favorite thermal insulation material is rigid polyurethane foam whose density is 60kg/m³ to 80kg/m³ and applicable temperature is -185℃ to 125℃.

PU foam is characterized by good mechanical property and heat insulating property. In the normal conditions, it can bear the temperature of 120℃. After modification or combining with other thermal insulation material, PU foam can withstand 180℃.

For our pre-insulated pipe, the thermal insulation material fills the gap between the steel pipe and the outer sleeve fully. Since it has certain bonding strength, the steel pipe, outer sleeve, and thermal insulation layer form a solid whole.

Advantages
1. Reduced construction cost
It is estimated that applying the PU foam insulated pipe can cut down the construction cost by about 25% when using glass reinforced plastic as protective layer and 10% when using high density polyethylene as protective layer under general circumstances.

2. Low heat loss, energy saving
The thermal conductivity of PU is 0.013 to 0.03 kcal/m·h·℃, which is much lower than that of the commonly used pipeline heat insulation material in the past. The heat preservation effect is enhanced by 4 to 9 times. Also, the water absorption of PU is very small, which is about 0.2kg/m².

3. Good corrosion resistance and insulation performance
The rigid PU foam insulating layer tightly adheres to the outer surface of steel pipe to eradicate the infiltration of air and water, achieving good corrosion protection.

4. Long service life
As long as the water in the pipeline is treated finely, the PU foam insulated pipe can serve more than 50 years which is 3 to 4 times longer than that of traditional water pipeline using trench laying or overhead installation.