Performance difference between steel plastic composite pipe and PE pipe 1. Long term hydrostatic strength Most of the pressure inside the steel skeleton plastic composite pipe is borne by the steel skeleton, so it greatly reduces the pressure on the plastic material itself. Therefore, steel skeleton polyethylene plastic composite pipe has better creep resistance to avoid long-term damage. The serv
Performance difference between steel plastic composite pipe and PE pipe
1. Long term hydrostatic strength
Most of the pressure inside the steel skeleton plastic composite pipe is borne by the steel skeleton, so it greatly reduces the pressure on the plastic material itself. Therefore, steel skeleton polyethylene plastic composite pipe has better creep resistance to avoid long-term damage. The service life of pipes largely depends on three factors - pressure, temperature and conveying medium. When the conveying medium and temperature are constant, higher long-term hydrostatic strength means longer service life or higher pressure bearing capacity.
2. Impact resistance and dimensional stability
The elastic modulus of steel is usually about 200 times that of high-density polyethylene. Steel wire spot welding steel skeleton structure makes the impact resistance and dimensional stability of steel skeleton polyethylene plastic composite pipe better than that of high-density polyethylene pipe. The existence of steel skeleton increases the rigidity and impact resistance of the pipe.
3. Large welding area
The steel skeleton polyethylene plastic composite pipe brings a large welding area through the connection of electric melting sleeve, and the calculation formula is π dl. D is the outer diameter and l is the width of the electrofusion sleeve. Taking DN250 as an example, the welding area is 3.14 x 0.275m x 0.25m = 0.22m2.
Ordinary polyethylene pipes are only welded at the cross section, and the calculation formula of welding area is π DW. W is the wall thickness. Taking de315 as an example, the welding area is
3.14 x 0.315m x 0.0185m = 0.018 m2 （SDR 17）
The welding area of steel skeleton plastic composite pipe with similar inner diameter is 12 times that of polyethylene pipe, and the strength of the welded joint is much higher than that of ordinary PE pipe.
4. Low construction cost
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