Polyethylene pipe performance advantages: ultra high molecular weight polyethylene pipe price is more moderate. Medium-diameter polyethylene pipe, the low-pressure pipe of the total project cost even lower than seamless, even lower than the composite tube and alloy pipes, but life is higher than six times more than steel, composite pipe more than 4 times Heilongjiang polyethylene fittings, very significant economic benefits. Polyethylene pipe, also known as high-density polyethylene. Extrusion: for the extrusion of grade generally has a melt index of less than 1 and the width to broad MWD. Inner Mongolia in the process of polyethylene pipe, the low availability of suitable melt strength MI. Broader MWD is more suitable for extrusion grades, because they have higher production speed, lower die pressure and melt fracture reduction trend.