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wr@insulatedpipeline.com
wyy@insulatedpipeline.com
Published:2025-07-14 | Last Updated: 2025-07-14 Views: 2
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High-temperature pre insulated pipelines are industrial piping systems designed specifically for transporting high-temperature media.
They are prefabricated in a factory and incorporate highly efficient insulation structures.
They are then transported to the construction site for direct installation.
This design improves construction efficiency, insulation quality, and system reliability.
| Parameter Name | Description/Example |
|---|---|
| Working Pipe Outer Diameter (mm) | DN80, DN100, DN150, DN200, DN250, DN300, DN400, DN500 |
| Working Pipe Material | Carbon Steel, Alloy Steel, Stainless Steel |
| Working Temperature (°C) | 120°C, 150°C, 200°C, 350°C, 400°C, 450°C |
| Working Pressure (MPa) | 0.6MPa, 1.0MPa, 1.6MPa, 2.5MPa |
| Insulation Material | Rock Wool, Aluminum Silicate Fiber, Calcium Silicate, Polyurethane Foam (for medium and low temperature) |
| Insulation Thickness (mm) | 50mm, 75mm, 100mm, 150mm |
| Outer Casing Material | HDPE, Steel Casing, FRP (Fiberglass Reinforced Plastic) |
| Outer Casing Diameter (mm) | Determined based on insulation thickness and working pipe outer diameter |
| Laying Method | Direct Burial, Overhead, Trench |
| Execution Standard | CJ/T 114-2000, GB/T 29047-2012, EN 253 |
| Component | Description | Common Materials/Features |
|---|---|---|
| Working Pipe | The core channel for conveying high-temperature media such as steam, high-temperature water, heat transfer oil, etc. |
|
| Insulation Layer | Wrapped outside the working pipe to reduce heat loss, maintain medium temperature, and lower the outer surface temperature. |
|
| Outer Casing | Protects the insulation layer from physical damage, moisture intrusion, and chemical corrosion. |
|
(1) Working Pipe for Medium Transportation
The core component of high-temperature prefabricated insulated pipes is the working pipe.
It is responsible for transporting high-temperature media such as steam, high-temperature hot water, or thermal oil.
The material selection depends on the medium's temperature, pressure, and corrosiveness, with options including carbon steel, alloy steel, or stainless steel.
For example, in a steel jacketed steam pipe system, the working pipe can withstand high temperatures and pressures.
(2) Insulation Layer for Thermal Insulation
An insulation layer is installed around the working pipe, typically made of materials such as alumina-silica fiber, calcium silicate, rock wool, slag wool, or composite insulation structures.
The functions of the insulation layer are:
To minimize heat loss and maintain the medium temperature
To reduce the surface temperature of the pipe, ensuring construction and operational safety
To prevent condensation droplets from falling (for pipes transporting hot water or steam)
(3) Outer protective pipe structure
The outermost layer is the outer protective pipe, primarily serving the following functions:
Protecting the insulation layer from physical damage
Preventing moisture intrusion into the insulation layer to avoid reduced insulation performance
Resisting chemical corrosion from soil or groundwater
Common materials include high-density polyethylene (HDPE), steel casing (for steel sleeve insulated steel pipe), or fiberglass-reinforced plastic (FRP).
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Urban district heating primary network (high-temperature hot water >110°C)
Industrial steam transportation (temperature 120°C - 500°C+)
High-temperature thermal oil systems
Petrochemical process fluid transportation
Regional energy station combined cooling, heating, and power supply systems
Significant energy savings: extremely low heat loss
Long service life: comprehensive corrosion and waterproof protection
High construction efficiency: shortened construction period and reduced on-site risks
Operational safety: low surface temperature, reducing the risk of burns
High comprehensive economic benefits: long-term energy savings and reduced maintenance costs
| Selection Factor | Description | Common Options/Suggestions |
|---|---|---|
| Conveying Medium | The type of medium conveyed inside the pipeline. |
|
| Operating Temperature | The maximum operating temperature of the medium, which determines the insulation material and structure. |
|
| Operating Pressure | The operating pressure of the system, which determines the material and wall thickness of the working pipe. | Select carbon steel, alloy steel, or stainless steel according to the design requirements. Use thick-walled pipes if necessary. |
| Working Pipe Material | Select the material based on temperature, pressure, and corrosion resistance. |
|
| Insulation Material | Select the appropriate insulation material based on temperature and cost-effectiveness. |
|
| Outer Casing Material | Select the outer casing material based on the laying method and environment. |
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| Laying Method | The installation environment of the pipeline. |
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| Economy and Service Life | Combine project budget and service life. | Choose a solution with low long-term heat loss and low maintenance costs. Although the initial investment is high, the overall economy is better. |
| Typical Applications | Examples of application scenarios. |
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E-mail：wr@insulatedpipeline.com
E-mail：wyy@insulatedpipeline.com
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