Steel Wire Reinforced SRTP Pipe Production Line
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Steel Wire Reinforced Polyethylene Pipe Manufacturing Process & Application For many years, the pipe researching engineers want to reinforce the plastic pipe with metal, and then the plastic’s anti-corrosive and flexible properties could be combined with the metal’s high stiffness properties together. An outstanding plastic welded-steel-mesh composite pipe system then has been developed by Russian technicians in 1990’s and it has been widely used in pressure pipe application and oil field. However, the pipe still has some shortage in steel-plastic bonding interface and the connection of the pipe. Therefore, after this technology has been introduced to China, Goldstone Orient New Material Equipment Co., Ltd., one of the leading companies in China for composite pipe, has improved and developed a new generation innovative Steel Wire Reinforced Polyethylene Composite Pipe (hereinafter called SRP Pipe) use their owned technology. The polyethylene pipe has been reinforced by wrapping the high strength steel wire in the middle layer. It results the pipe working pressure could easily reach 5Mpa (D≤φ110), 3Mpa (D≤φ200), 2Mpa (D≤φ500) when you use PE80 grade polymer. Goldstone Orient owns full intellectual property rights and patent for pipes as well the pipe making machinery. The new technology makes the PE pipe stronger, durable and reduces the material cost definitely.

Goldstone Orient’s know-how of composite process could guarantee that the polyethylene and the reinforced material could be integrated into one well-combined part. The pipe is available used as the pressure pipe systems for water supply, chemical industry, agriculture, construction, petroleum and gas. Thinking of the different requirements of customers, the extrusion line is flexibility either for standard polyethylene pipe or composite pipe. We aim to bring you more benefit with the minimal investment.

Structure of the pipe The composite pipe’s structure is shown as Figure 1. Adhesive bonding layer Steel wire (mesh) reinforced layer Outer pipe layer (PE) Core pipe layer (PE) Process The polyethylene core tube has been produced firstly. Then the pipe will go through the steel wire winding unit to the outside layer extruders. Steel wire bobbins are installed in two round plate, the plate rotate one in clockwise and the other in opposite direction. So the wire will wrap on the core tube as a steel mesh. The second extruder

coats the adhesive resin on steel for binding of steel and plastic. And then the outer polyethylene layer will cover all steel mesh and core tube to make a finished composite pipe. Reinforcement The meshed steel wire located in the middle layer to be the reinforcement. This wire is a kind of high sthrength steel wire which can provide the excellent pressure against property. Steel wire, fiberglass, polyester fiber or other kinds of high stiffness fiber could be used as the medial reinforcement on the polyethylene pipe. With these strengthening materials, the working pressure resistance of...

* The above data is based on PE80. Binding material The bond material coated on the steel wire is a kind of high performance modified HDPE adhesive resin. This thermal resin is easily merged with polyethylene; further more, the polar-link-key of the resin provides an excellent bond property with steel atoms (200N/25mmASTMD903). This kind of resin has been widely used as boundary material between steel and HDPE in the many big project in China. Steel-Plastic Binding For the other composite polyethylene pipes, the most serious bug is that there is no binding interface between steel and PE. So...

In summarized, SRP pipe is a kind of innovated plastic composite pipe, accompany with the improvement of reinforced material, pipe structure and manufacturing process, we believe that the SRP will play more roles in future pipe market. Goldstone Orient New Material Equipment Co., Ltd. Tel: 86-28-87769121/ 31 Fax: 86-28-87769982 www.goldstone-group.com