Pipe diameter range: 500-1600MM
polyurethane spraying polyethylene winding prefabricated direct buried insulation pipe is composed of working steel pipe for conveying medium, sprayed polyurethane rigid foam insulation layer and winding polyethylene outer casing. 

Main features of the production line:
Three-stage dust removal meets environmental standards.
Suitable for continuous production of large-diameter insulated pipes, offering high efficiency and energy conservation.
The production line operates automatically, with automatic loading and unloading of pipes.
Continuous spraying provides consistent coating thickness, conserving raw materials.
Extrusion is performed using a highly efficient and energy-saving extruder. Automated precision machining of pipe joints.
 

Pipe Usage

Polyurethane spraying polyethylene wrapping pre-insulated pipe production line is used for the production of polyurethane prefabricated direct buried thermal insulating pipes, which are widely used in the field of heating, cooling and crude oil transportation.

 

---The extrusion line comprise equipment and devices as below,

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

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

 

Detailed Photos

Production line equipment Photos show

  Rust Removal   
 

 PU Spray PE winding  

PE Jacket Water quenching 
 

 Wrapped finished pipe

 

Qingdao Huashida Machinery Co., Ltd was established in 2003. Since its inception, Huashida has focused on plastic polyurethane insulation pipe production line, 3LPE anticorrosion pipe production line, large diameter underground pipe production line and plastic pipe joints for 20 years. We always attach great importance to research and development,collaborating closely with Beijing University of chemical technology, Qingdao university of technology and scientific research institutions. by absorbing advanced technology home and abroad, after 22 years of endeavor we now rank one of the top 3 manufacturers in the industry in China.  Huashida machines have been well received in Saudi Arabia, Kazakhstan, Uzbekistan, United Arab Emirates, Turkey, Russia, etc.