Others
Insulation tube due to polyurethane rigid foam insulation layer tightly bonded to the steel pipe, isolated from the infiltration of air and water, can play a good anti-corrosion effect. While its foam is closed, the water is very small. High-density polyethylene shell, FRP shell has a good anti-corrosion, insulation and mechanical properties. Therefore, the work of steel pipe skin is difficult to be outside the air...
Explore