The polyurethane PERT pre-insulation pipe-internationally known as a flexible pre-insulated pipe-is defined in Chinese standards as Type II Heat-Resistant Polyethylene (PE-RT II) Low-Temperature Direct-Buried Heating Pipe.

This production line adopts a one-step continuous foaming process, ensuring stable performance, high production efficiency, and long-term reliability for district heating applications.

Superior Thermal Performance

• High Temperature Resistance: PERT II pipes can tolerate temperatures up to 110°C, ensuring reliable performance in high-temperature heating systems.
• Efficient Heat Transfer: With a 60°C supply water and 45°C backwater temperature, these pipes meet heating demands efficiently, reducing energy consumption and costs.

Quality and Safety

• Smooth and Pure Surface: The pipeline is smooth, free from impurities, and non-polluting, ensuring a clean and safe heating environment.
• Automated Operation: Heating companies can achieve unattended, automated operation, reducing labor costs and increasing operational efficiency.

Construction Advantages

• Simplified Construction: The construction process is simple and convenient, with a 40% reduction in excavation volume, greatly reducing construction costs and time.
• Material Savings: Compared to traditional materials like PERT I and PP-R, PERT II pipes offer significant material savings. For example, compared to PERT I, PERT II can reduce material use by 15%, and compared to PP-R, it can reduce material use by 30%.

  

  

  
  

  Product Parameters

  It saves the raw materials for using PE-RT II pipe.
  Example: Level 2 design pressure: 10 Bar; for cold and hot water transfer in buildings
  Selection of different material pipes: the highest PE-RTIIS value; the thinnest wall thickness
  Compared to PERT I, PERT II can reduce material use by 15%
  Relative to PP-R, PERT II can reduce material use by 30%
  Note: According to relevant Chinese national standards and draft

  	s	Dia.(mm)	Wall Thickness(mm)	Wall Thickness Area(m2)	Density(kg/m3)	Length(m)	Weight (kg)	Weight Save PERT/X
  PERT II	S3.2	16	2.2	9.5E-05	947	1000	90
  PERT I	S2.5	16	2.7	1.1E-04	933	1000	105	-17%
  PP-R	S2	16	3.3	1.3E-04	900	1000	118	-31%
  PERT II	S3.2	20	2.8	1.5E-04	947	1000	143
  PERT eI	S2.5	20	3.4	1.8E-04	933	1000	165	-15%
  PP-R	S2	20	4.1	2.0E-04	900	1000	184	-29%
  PERT II	S3.2	25	3.5	2.4E-04	947	1000	224
  PERT I	S2.5	25	4.2	2.7E-04	933	1000	256	-14%
  PP-R	S2	25	5.1	3.2E-04	900	1000	287	-28%
  PERT II	S3.2	32	4.4	3.8E-04	947	1000	361
  PERT I	S2.5	32	5.4	4.5E-04	933	1000	421	-17%
  PP-R	S2	32	6.5	5.2E-04	900	1000	469	-30%

Flexible Polyurethane Foam Insulation Pipe Production Line

• Products: Flexible pipe production line in polyurethane foam insulation.
• Pipe Diameter Range: 20-110 mm.
• Productivity: 1.5-5 m/min.
• Structure: Work tube - PE, PE-RT or steel; Isolation - PPU; Sheath pipe - LDPE.

Model Specifications

One-Step PERT Flexible Pre-Insulation Pipe Production Flow
Pipe Unwinding → Unwinding Traction → V-Shaped Wheel Conveying → Track Feeding → Film Encapsulation → Polyurethane Pouring & Foaming → Foam Curing → HDPE Outer Layer O-Shape Extrusion → Vacuum Coating → Spray Cooling → Winding