instead of copper pipe, middle is steel, outside is plastic. 1.large ... .5Mpa 2. temp -20 to 95 degree 3.easy repair instead of seamless, copper pipePipe Outer diameter (mm)Pipe Thickness (mm)Pipe ... drain conveying pipe, drainage pipe, irrigation pipe;Chemical industry:Manufacturing of Acid, alkali and salt. fertilizer, pesticide, pharmacy, chemical, mining and ...