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Shandong Aokai Pipe Material Technology Co., Ltd. was invested by Linyi Sunshine Automobile Trading Co., Ltd. with an investment of 100 million yuan. It is located in Nanlizhuang Town, Linyi Economic Development Zone. In the first phase, a 28,000-square-meter standard factory building has been built to produce high-density polyethylene (HDPE) winding reinforced tubes, which are widely used in municipal engineering, sewage treatment, sewage, power, sea, port, petrochemical and other fields. The company's products are mainly high-density polyethylene (HDPE) winding reinforced pipe and pipe fittings, divided into three series of PR, VW, SQ, more than 20 kinds of specifications, nominal diameter DN300-DN4000, resistance to external load performance - ring stiffness 2 Level 20; production, technology, inspection, storage, transportation, connection, implementation (GB/T19472.2-2004) "Purified polyethylene (PE) structural wall piping system Part II: Polyethylene winding structural wall pipe" B-type structural wall tube part and German standard DIN16961 standard. Design, construction, acceptance and compliance (CECS164-2004) "Technical Regulations for Buried Polyethylene Drainage Pipeline Engineering".