They are intended for heat pipelines designed for laying heating and hot water supply of cities, settlements and agricultural enterprises at the temperature of the coolant up to 150 degrees Celsius.
Advantages:
1.Cheapness(3-4 times cheaper than metal ones)
2.Durability(Service life 40-60 years)
3.Corrosion resistance
4.Low thermal conductivity
5.Do not require costs in operation
6.Low labour intensity at installation
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