Automated PLC Control Pre-Insulated Pipe Production Line with High-Pressure Foaming Machine for 500-1600mm Diameter Range
PU Spray Foaming HDPE Winding Pre-Insulated Pipe Production Line
Pipe Diameter Range: 500-1600mm
The PU spray foaming HDPE wrapping pre-insulated pipe production line is specially designed for manufacturing polyurethane pre-insulated direct buried pipes. These pipes are widely used in district heating networks, cooling systems, and crude oil transportation projects.
Main Features of PU Spray Pre-Insulated Pipe:
- Uniform and adjustable polyurethane foam density ensures stable insulation performance.
- The rigid polyurethane foam is fully filled without voids or air gaps.
- The polyurethane foam surface is rough, providing strong adhesion to the polyethylene outer jacket, with shear strength exceeding 200 kPa.
- Both the polyurethane insulation thickness and HDPE outer casing thickness can be customized according to project requirements.
- Fully automated production process with high efficiency and stable operation.
PUF spray PE winding preinsulated pipe production line consists of the following parts:
3) Polyethylene sheet extruding winding line
4) Water cooling line
5) End-cutting equipment
Main line Composition of the polyurethane coating steel preinsulated pipe equipment:
| No. | name |
| 1 | External wall Shot blasting rust removel machine |
| 2 | Medium-frequency induction heating furnace |
| 3 | Polyurethane spray foaming unit |
| 4 | pipe rotator trolley |
| 5 | Single screw extruder and diehead mould |
| 6 | Finished pipe ends trimming machine |
| 7 | pipe Conveyers and racks |
| 8 | Electrical system and PLC |
Production line equipment Photos show
Rust Removal
First, the surface of the steel pipe is derusted, usually by shot blasting or sand blasting, to ensure that the surface is clean and free of rust, oil and other impurities. Preheating: The cleaned steel pipe is preheated so that the subsequent polyurethane foam can better adhere to the steel pipe surface.
Polyurethane spray molding line
The polyurethane raw materials (isocyanate and polyol) are mixed in a high-pressure foaming machine and evenly sprayed onto the surface of the preheated steel pipe. The polyurethane raw materials rapidly foam on the surface of the steel pipe, forming an insulating layer.
Polyethylene sheet extruding winding line
Polyethylene (PE) is wrapped around the polyurethane insulation layer to form an outer sheath. Cooling and shaping: The wrapped pipe is cooled and shaped to ensure that the outer sheath and insulation layer are tightly bonded to form a stable structure.
PE Jacket Water quenching
Wrapped finished pipe
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