... the pipe circumference4.Advantage: 1.Non-toxic, no heavy metal additives, no fouling, not breed bacterium,2.Corrosion resistant: PE is ... mediums, or electron chemical corrosion. except for few strong oxidants3.High strength, good performance to resist the environmental stress cracking, good ... under normal conditions.8.Recyclable, benefit to the environmentOur company: high quality PE gas pipe