Jiangsu HDPE Pipe Manufacturer_Sales_Price_Supplier_How Much【Zhenjiang Xingyang Electrical Pipe Industry Co., Ltd.】HDPE pipes must withstand certain pressure, usually requiring the use of high molecular weight PE resins with good mechanical properties, such as HDPE resins. LDPE resins have low tensile strength, poor pressure resistance, poor rigidity, poor dimensional stability during molding, and are difficult to connect, making them unsuitable for water supply pressure pipes. However, due to their high hygiene standards, LDPE, especially LLDPE resins, have become common materials for producing drinking water pipes. HDPE Pipe Specifications and Connection Methods: The diameter of HDPE pipes ranges from DN32 to DN1000, divided into 26 grades. The pressure grades are between 0.6Mpa and 1.6Mpa, with 5 grades. HDPE pipes will melt between 190℃ and 240℃, utilizing this property, the two melted parts of the pipe material (or fittings) are fully contacted and maintained under appropriate pressure, and upon cooling, they become a solid unity. Therefore, the connection methods for PE pipes differ from those for U-PVC pipes, usually employing electric heat fusion and hot melt butt joint methods. Specifically, for DN≤63, injection molding hot melt socket connection is used; for DN≥75, hot melt butt joint or electric fusion socket connection is used; and for connections with different materials, flange or threaded connections are used. In terms of pipeline repair methods, there are expansion pipe construction and HDPE lining methods.