Large-Diameter Polyurethane Spray Insulated Pipe Machine with Automated Spraying and PE Wrapped Corrosion Resistance

This advanced production line is designed for manufacturing large-diameter insulated pipes, utilizing a highly efficient polyurethane spray coating process combined with polyethylene (PE) outer wrapping technology. It ensures superior thermal insulation, corrosion resistance, and structural durability, making it ideal for district heating, oil and gas pipelines, and industrial applications. The automated system enables precise control over insulation thickness and PE wrapping, delivering consistent high-quality pipes that meet international standards for energy efficiency and long-term performance.

 The spray coating and winding process for polyurethane insulation pipe products offers several key advantages:
•  Enhances the mechanical properties of the outer protective tube.  
•  Thins the wall of the outer protective tube.  

•  Lowers the water absorption rate of the insulation layer.
•  Increases the closed cell rate of the insulation layer.  
•  Decreases the eccentricity of the insulation pipe axis.  
•  Improves the uniformity of the overall insulation layer density throughout the pipeline.  
•  Boosts the compressive strength of the insulation layer.  
•  Reduces the thermal conductivity of the insulation layer, thereby minimizing energy loss.

Shot-blasting line (File 1)
1.  Auto loading - eliminates manual lifting
2.  Auto pipe-tracking & end-to-end connection - guarantees continuous flow
3.  Auto pipe-separation & end release - jam-free unloading
4.  Auto off-line - fully unmanned, maximum throughput

Coating / extrusion line (File 2)
5.  Self-adapting chuck: 520-1620 mm - no chuck change when switching diameter
6.  Elevating transfer car for loading - replaces overhead crane, safer & faster
7.  Dual-station chuck + robot spraying - spray while prepping next pipe, zero idle time
8.  Motorized lift for IF coil & spray-cooling ring - one-button format change, minutes only
9.  Adjustable spray density + manual touch-up - zero scrap, lower energy
10.  High-efficiency extruder - less power, higher output
11.  Electrically opening/closing frame - full access for maintenance & size change

Production process 
flow chart Steel pipe External shot blasting ----> PU foam spraying----> PE film wrapping----> water cooling---->cutting down pipeline---->trim end of pipe---->printing mark&loading down finished pipe---->sealing end of pipe 
Main equipment External shot blasting and rust removal operation line
Chuck type spraying operation line
PU Thermal insulation layer winding production line

Qingdao Huashida Machinery Co., Ltd was established in 2003 and has focused on plastic pipe production line, 3LPE anti-corrosion processing line and joints of plastic pipes & 2PE 3PE pipes for over 15 years, we are private high-tech enterprises integrated by R&D, manufacturing, selling, service and trading. We are always concentrating on research and development of plastic extrusion equipments, 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, 3PE anti-corrosion processing line, and PE hollow wall spiral pipe production line. 

Established in 2003, Qingdao Huashida Machinery Co., Ltd. is a leading private high-tech enterprise dedicated to the integrated operations of R&D, manufacturing, sales, service, and trading. Our factory spans an area of approximately 4,000 square meters and employs 70 skilled professionals. We operate two main production facilities: one specializing in pipe-making production lines and the other in pipeline plastic joints. Our technical prowess is underpinned by a team of over 10 engineers and two state-of-the-art detection and control testing laboratories. Our commitment to innovation has earned us more than 30 technical patents, as well as certifications such as ISO 9001 for quality management, ISO 14001 for environmental management, SGS, DVGW, and CE. Qingdao Huashida Machinery Co., Ltd. is deeply committed to the research and development of plastic extrusion equipment. We maintain close collaborations with prestigious institutions such as Tsinghua University, Beijing University of Chemical Technology, and South China University of Technology. By continuously absorbing advanced technologies both domestically and internationally, we have positioned ourselves as one of China's top manufacturers of plastic extrusion machines. We excel particularly in the production of PE insulation jacket pipe extrusion lines, 3PE anti-corrosion processing lines, and PE hollow wall spiral pipe production lines.

The company has a technical team of over 10 engineers and two state-of-the-art detection and control testing laboratories. It has obtained more than 30 technical patents and holds certifications such as ISO 9001 for quality management, ISO 14001 for environmental management, SGS, DVGW, and CE. 

After Sales Service

We have a professional after-sales team. After purchasing the product, our engineers will arrive at the factory in the customer's country to provide guidance on equipment installation and commissioning.
For detailed inquiries, please contact Ms.Xiaofei

Exhibition