Automatic PU Spraying PE Winding Thermal Pre-Insulated Pipe Production Line

Huashida Rigid polyurethane spraying polyethylene winding prefabricated directly buried insulation pipe consists of steel working pipe, spraying polyurethane rigid foam insulation layer and winding polyethylene outer protective pipe.


The line adopts continuous spraying production process.It features a high degree of automation, fast production efficiency, raw material saving, increased foaming and closed-cell rate, reduced water absorption rate, and three-in-one molding, making its performance more reliable. Low-carbon and environmentally friendly products have high economic and social benefits.

The production line is composed of three major parts:

√ Steel Pipe Shot Blasting Machine
√ Polyurethane Spraying Production Line
√ PE Outer Jacket Winding Production Line

Application scenario:

Mainly used for the production of thermal insulation pipes for heating, cooling, petroleum, chemical and other fields.

Production steps:

1. Remove rust from steel pipe surface
2. preheat the steel pipe to get it ready for polyurethane spraying
3. Spray polyurethane evenly on steel pipe outer surface
4. Wrap melted HDPE strap around the PU foam
5. Trim the pipe ends

Production line parameter:

1.Steel pipe range: 206mm-1820mm

2.Processing capacity:≤250m²/h

3. Cleaning class: Sa2.5

4.Used material: ISO (isocyanate), POLY (premixed polyether polyols), PE

5.Main equipment: Shot blasting and rust removal production line, Polyurethane spray production line, PE winding production line.