... weight, good mechanical strength and heat-resisting performance, PEX/AL/PEX PIPE 1, Non-toxic, corrosion resistance,light weight, good mechanical ... low temperature and long service life. 2, Fluid resistance inside pipe is small, not easy scaling, fluid not being polluted, ... 3, 100% insulating oxygen,stop oxygen's penetration. Aluminum-plastic pipes can be used as shielding of communications lines, and ...