... more technical and economical than copper pipe, UPVC pipe, PEX-AL-PEX pipe, PEX pipe and PB pipe. It is the primary water ... effective in heat preservation and energy conservation of hot water pipe.5, Light, high pressure resistance: the weight is ... outer of the pipe is smooth, with little fluid resistance.7, Easily fix and reliable: use fusing welding no need ... 32x5.4 40x6.7 50x8.4 63x10.5 ppr pipe