Application cold or hot water supply, heating system including flooring heating, wall heating and radiating system, Central condition system, industrial liquids transpotation. Features: *Healthy and non-toxic, free of stains and scales *High temperature resistance *Adopting hot weiding connection for excellent welding quality of pipe and fittings, leakage effectively prevented. *Light weight, easy to handle and transport *Low noise, reduced by 40% compared to galvanized stee pipes *Excellent ability in chemical corrosion resistance *Easy and fast installation, minimized installation time and cost *Over 50 years of service life under normal conditions. S5 (cold water)S (cold water)S3.2 (hot water)S2.5 (hot water)20*2.020×2.320*2.820×3.425*3.225×2.825×3.525×4.232*2.932×3.632×4.432×5.440*3.740×4.540×5.540×6.750*4.650×5.650×6.950×8.363*5.863×7.163×8.663×10.575*6.875×8.475×10.375×12.590*8.290×10.190×12.390×15.0110*10110×12.3110×15.1110×18.3160*14.6160×17.9160×21.9160×26.6