Dongying Donhe Pipeline Technology Co., Ltd , is a professional manufacturer for HDPE pipeline and fittings for gas, water supply, drainage, pollution discharge. In strict accordance with the standard of ISO, CNS, EN, ASTM, DIN, our company can supply HDPE ÃŽ¦20ÃŽ¦1600 series water supply pipelines and HDPE ÃŽ¦20ÃŽ¦630 series gas pipes; HDPE DN300-DN4000 winding reinforcing pipes with various levels and series for drain and pollution discharge with the pressure class such as SN2, SN4, SN6, SN8, SN10, SN12, SN16 and SN20. The technology for manufacturing HDPE ä75ÃŽ¦1600 of double-wall corrugated pipe in S1 and S2 series for drain and pollution discharge and their fittings, especially for caliber that over ÃŽ¦1000 of the flange and the reducing pipe of HDPE series pipeline, is leading in the plastic pipe industry. The products have been widely applied in many fields such as municipal industry, agriculture, electric power industry, mining industry, chemical industry and so on.With the proprietary brand â Donheâ, the perfect enterprise management system and continual innovation, our company cooperates with customers to develop win-win.