1-Cold and hot water systems in buildings. Under and above ground project. 2. Heating systems in buildings, including floor, wall panels, and radiant heating systems; 3. A pure water supply system that is drinkable 4. Central air-conditioning system 5. Conveying or discharging chemical media and other industrial piping systems.1.Hygienic and non-toxic 2.High Temperature Resistance 3.Anti-corrosion and no furring 4.Thermal Insulation and Energy Conservation 5.Light with high intensity 6.Agreeable Appearance 7.Easy and Reliable Installation 8.Long service life