... idea of energy saving, environment protecting, healthy and comfortable, it’s the ideal choice for the modern building supporting facilities.“Seher” PE ... the damage.4, Pipe wall is smooth both in inner and outer and little fluid resistance, it can carry 30% more liquid ... low temperature condition and no need to preheat.6, Rust-proof, long service life;7, Easy for butt welding or fusing welding, good in ...