Steel sleeve steel insulation pipe

Steel Sleeve Steel Insulation Pipe

Product Overview:
The steel sleeve steel insulation pipe—also known as “steel jacket steel pipe” or “steel-insulated steel pipe”—is a high-performance thermal pipeline system designed for the transportation of high-temperature steam or hot water. It features a multi-layer structure consisting of a working steel carrier pipe, high-efficiency insulation material, and a spiral-welded steel protective outer casing, making it ideal for direct-buried heating applications in urban and industrial settings.

Structure Composition:

1. Working Pipe (Inner Layer):

• Material: Seamless or welded carbon steel (e.g., 20#, Q235B, Q345B)

• Function: Carries steam or high-temperature fluid

2. Insulation Layer:

• Material: High-density glass wool or composite silicate insulation

• Function: Minimizes heat loss, ensures energy efficiency

3. Outer Protective Sleeve:

• Material: Spiral welded carbon steel pipe

• Function: Protects against soil pressure, corrosion, and mechanical damage

4. Optional: Air Duct or Leak Detection Cable:

• Enables real-time monitoring and maintenance

Key Features:

• High Temperature Resistance: Supports steam transport up to 400°C

• Excellent Insulation: Minimizes thermal loss during long-distance transport

• High Structural Strength: Resists external loads in buried environments

• Corrosion Resistance: Outer steel sleeve prevents water and chemical ingress

• Factory Prefabricated: Ensures quality and reduces on-site work

• Optional Leak Detection System: Enhances safety and operational control

Technical Specifications:

• Diameter Range: DN100–DN1200 (customized sizes available)

• Insulation Thickness: Typically 30–100 mm

• Operating Pressure: Up to 2.5 MPa or more

• Applicable Temperature: –30°C to +400°C

• Service Life: 30+ years under normal operating conditions

• Standard Compliance: GB/T 29047, CJ/T 114, SY/T 0420, etc.

Applications:

• Municipal central heating networks

• Industrial steam and hot water pipelines

• Chemical, power, and petrochemical industries

• Underground long-distance thermal energy transmission

Advantages:

• Strong mechanical protection from soil and external forces

• Low thermal conductivity ensures efficient energy use

• Long service life with low maintenance requirements

• Ideal for direct-buried installation in urban infrastructure projects

• Customizable to fit various design and engineering needs