one-step continous pre-insulated production line for steel pipe and plastic pipe

The One-Step pre-insulated Pipe Production Line is an advanced, fully integrated manufacturing system designed for the continuous production of high-performance insulated pipelines used in district heating, oil & gas transportation, and underground thermal networks. This system adopts one-step continuous forming technology, where the carrier pipe, polyurethane foam insulation, and outer HDPE jacket are combined in a single synchronized process. Compared to traditional multi-step production, this technology significantly improves efficiency, reduces labor, and ensures superior bonding quality between layers. The production line is suitable for manufacturing pre-insulated pipes with diameters ranging from 30mm to 500mm (or customized), meeting international standards for thermal insulation and pipeline protection.
 

This production line is engineered to produce three-layer insulated pipe structures, consisting of:

1- Inner Pipe (Steel or Plastic Carrier Pipe)
Responsible for fluid transportation (hot water, oil, gas, etc.)
2- Middle Layer (Rigid Polyurethane Foam)
Provides excellent thermal insulation with low thermal conductivity and high compressive strength.
3- Outer Layer (HDPE Jacket Pipe)
Protects the pipeline from moisture, corrosion, and mechanical damage, especially in underground environments. 
 

Applications

• District heating and cooling systems
• Oil & gas pipeline insulation
• Chemical fluid transportation
• Underground thermal pipeline networks
• Industrial energy-saving systems 

• One-Step Continuous Production - Fully integrated process from feeding to finished pipe
• High Automation System - PLC control with synchronized operation
• Precise PU Injection - Accurate mixing ratio and uniform foam distribution
• Strong Layer Bonding - Ensures long service life and durability
• Wide Diameter Range - 48-630mm or customized
• Energy Efficient Design - Reduced material waste and power consumption
• Flexible Configuration - Suitable for heating, cooling, oil & gas pipeline 

• Higher production efficiency (continuous operation)
• Reduced labor and handling costs
• Improved insulation quality and consistency
• Better adhesion between layers
• Lower defect rates

Qingdao Huashida Machinery Co., LTD, is a manufacturer of series of plastic pipe machines, municipal pipe machines, pipe insulation&anticorrosion machines, and pipe jointing&anticorrosion materials, with more than 20 years of production experience. 
Our main products are:
1. HDPE jacket pipe for pre-insulated pipe Production Line 
2. Rigid pre-insulated pipe Production Line
3. Flexible pre-insulated pipe (PERT) production line
4. Steel pipe FBE/2LPE/3LPE anti-corrosion coating line
5. Steel pipe derusting line
6. PE pressure pipe/Water Gas supply pipe production line
6. PP/PE plastic board/sheet/geomembrane production line
7. NBR PVC Thermal insulation tube/plate production line  
8.Pipeline anti-corrosion materials and instruments: heat shrink joint coating sleeve, electro-fusion weldable joint sleeve, portable welding gun (extruder), PE PP welding rod.  

We are always attach great importance to research and development, collaborating closely with Tsinghua University, Beijing University of chemical technology, South China university of technology and scientific research institutions. by absorbing advanced technology home and abroad, we now rank one of the top 3 manufacturers in the industry in China. We have been working with more than 400 overseas customers and exporting our products to Kazakhstan, Uzbekistan, Middle East, Russia, Nigeria and other countries. 

 

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Thank you for your interest in Qingdao Huashida Machinery Co., Ltd. equipment.

For further details, please feel free to contact us at any time. Our team will respond promptly and provide a fully customized solution tailored to your specific requirements and project needs.