HDPE gas pipes of almost all raw materials used by using imported raw materials, main level is PE80 and PE100. There are no special material for mass production of PE gas pipes HDPE gas pipe, usually high-density polyethylene the strength and hardness to be higher than the fuel pipe compound.
For pipe, however, as time goes on will have aging phenomenon, its mechanical properties and physical properties will be attenuated, pipe initial ductile failure, will decay into a brittle failure of aging.
For the decay of the aging process, special material gas slowly than HDPE, so, mainly using a MDPE is used as special material for gas.