HDPE Jacket Steel Pipe

 

The full name of high-density polyethylene jacket steel pipe is: high-density polyethylene plastic outer protective polyurethane foam prefabricated directly buried insulation pipe. It is composed of a working steel pipe for conveying the medium, a polyurethane insulation layer, and a polyethylene plastic outer protective pipe, combined outwardly in sequence through the equipment.

HDPE Jacket Steel Pipe Specification

Size	ERW/LSAW: 25-630mm*length: 6m SSAW：219mm-3620mm* length:12m WT: 1.24mm – 60mm (SCH10-SCH160)
Material	ASTM A53 pipe (Grade B) ASTM A106 pipe (Grade B/C) API 5L Grade B/X42/ X52/ X65/ X80, PSL1/ PSL2 line pipe
Coating Thickness	The outer 2.0-4.0 mm, and the inner 0.35-0.5 mm
Coating color	Black
Conventional pressure	0.1 mpa-5.0 mpa
Resistant to 3% saltwater, 10% acid, alkali, oil, salt	Unchanged in 72H

High-Density Polyethylene Plastic Outer Protective Polyurethane Foam Prefabricated Directly Buried Insulation Pipe

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Characteristics of High-Density Heat-resistant Polyethylene Insulation Pipe:

According to the data, high-density heat-resistant polyethylene pipes have the following characteristics compared to ordinary steel pipes:

1. Excellent Insulation Performance: The thermal conductivity of the inner layer is only 0.42W/m.K, resulting in significantly lower heat loss compared to steel pipes. Long-term operation can save a large amount of energy, thereby reducing energy costs significantly.
2. Strong Waterproofing and Corrosion Resistance: It is reliably sealed, preventing leakage and corrosion. It is rust-free, does not pollute water quality, and prevents scaling and blockage. This provides significant advantages in the daily management and maintenance of thermal networks.
3. Good Corrosion Resistance and Impact Resistance at Low Temperatures: The material remains resilient at temperatures as low as -70℃, making it suitable for use in cold regions.
4. Pressure and Temperature Resistance: It offers reliable performance with a service life of up to 50 years at temperatures up to 70℃.
5. Convenient Fusion and Electrofusion Welding: The pipe can be easily and securely joined using heat fusion or electrofusion welding.
6. Simple and Quick Construction Process: Installation is convenient and does not require trenching; the pipe can be directly buried underground.
7. Excellent Resistance to Rapid Crack Growth and Slow Crack Growth: The pipe can recover after being flattened. In case of pipe breakage or damage, local water-blocking operations can be easily carried out using a squeeze-off tool, facilitating emergency repairs and cost savings.
8. Economic Feasibility: For diameters below 90mm, the material cost of high-density heat-resistant polyethylene pipes is comparable to steel pipes. For diameters above 110mm, the cost may be 10-20% higher than steel pipes. Considering construction and operation costs, high-density heat-resistant polyethylene pipes are more cost-effective than steel pipes for diameters below dn355.

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