Automated Polyurethane Spray Foam Preinsulated Pipe Production Line with High-Pressure Foaming Machine for 500-1600mm Pipe Diameter Range

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.
The line includes pipe pre-treatment, spray foaming, HDPE winding, cutting, testing, and finished product handling, realizing fully automatic continuous production.Applicable for various pipe diameters and insulation thicknesses, meeting the production needs of different specifications of pre-insulated pipes.

Features
1. Dust removal meets environmental standards
2. Suitable for the production of large-diameter insulation pipes
3. Automated operation of production lines
4. Spraying saves materials
5. Efficient extrusion of pipelines
6. Automated precision machining of pipeline interfaces

Application

District heating pipelines, urban central heating projects, industrial high-temperature pipeline insulation, and other buried pipeline systems.

The spraying and winding production process ensures the uniformity of the density of the insulation layer, improves product quality, and reduces production costs.

PUF spray PE winding preinsulated pipe production line consists of the following parts:

1) Steel pipe outwall shot blasting line

2) Polyurethane spray molding line
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

 

Detailed Photos

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

 

 

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.

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