Pre-Insulated Steel Pipe Production Line with 508-1620mm Diameter Range, Continuous PUR Spraying, and PE Wrap Winding
Huashida's independently developed PUR Spray & PE Wrapping Insulated Steel Pipe Production Line (suitable for 508-1620 mm steel pipes) integrates three core sections: an external pipe shot blasting and rust removal line, a polyurethane spray foaming line, and a PE wrap winding line.
This advanced production system is supported by multiple national utility patents and has received a Level 5 technology rating from a third-party evaluation, meeting domestic leading industry standards. It has also been recognized as a "First Set of Technical Equipment" in Shandong Province.
The line adopts a continuous PUR spraying process and is fully automated, delivering high production efficiency, reduced raw material consumption, and optimized energy savings. It ensures excellent polyurethane foaming quality, a high closed-cell rate, low water absorption, and a stable three-in-one (trinity) molded structure.
The resulting insulated pipes are eco-friendly and low-carbon, offering stable performance along with outstanding economic and social benefits.
- Steel pipe surface shot blasting and de-rusting
- Medium-frequency induction preheating
- Uniform polyurethane spray foaming
- HDPE strip wrapping over PU foam layer
- Finished pipe end trimming
| No. | Equipment Name |
|---|---|
| 1 | External wall shot blasting derusting machine |
| 2 | Medium-frequency induction heating furnace |
| 3 | Polyurethane spray foaming unit |
| 4 | Pipe rotator trolley |
| 5 | Single screw extruder and die head mould |
| 6 | Finished pipe end trimming machine |
| 7 | Pipe conveyors and racks |
| 8 | Electrical control system and PLC |
External Shot Blasting & PU Foaming
Qingdao Huashida Machinery Co., Ltd was established in 2003 and has focused on plastic pipe extruder production line and joints of plastic pipes and 2PE 3PE pipes machinery for over 16 years. We are a private high-tech enterprise integrated by R&D, manufacturing, selling, service and trading.
We are always concentrating on research and development of plastic extrusion equipment, tightly cooperating with Tsinghua University, Beijing University of Chemical Technology, South China University of Technology and some other colleges and scientific research institutions. Meanwhile, by absorbing advanced technology home and abroad, we have been one of the top manufacturers of plastic extrusion machines in China, especially of PE insulation jacket pipe extrusion line, PE PP sheet extrusion line, and PE hollow wall spiral pipe production line.
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