This prefabricated hot-water insulated pipe is designed for overhead, trench and integrated pipe-gallery installation, not for direct-buried condition. It consists of working steel pipe, high-temperature composite layer, insulation layer and metal outer jacket. Multiple outer-jacket materials are optional: color steel sheet, hot-dip galvanized steel sheet, aluminium sheet and stainless steel sheet. It is manufactured in accordance with T/CDHA 1-2013 Prefabricated Hot-water Insulated Pipes and Fittings for Overhead and Integrated Pipe Gallery.
Product Structure
· Working steel pipe: Medium-transport base, bears pipeline working pressure
· High-temperature composite layer: Protection component for high-temperature working conditions
· Insulation layer: Polyurethane thermal-insulation component
· Metallic outer jacket: Optional: color steel sheet, hot-dip galvanized steel sheet, aluminium sheet, stainless steel sheet
Product Parameters
|
Outer-jacket Outer Diameter(mm) |
Color steel / Hot-dip galvanized steel Min. Wall Thickness(mm) |
Aluminium / Stainless steel Min. Wall Thickness(mm) |
|
90~250 |
0.5 |
0.4 |
|
251~500 |
0.6 |
0.5 |
|
501~800 |
0.8 |
0.6 |
|
801~1400 |
1.0 |
0.8 |
|
1401~2000 |
1.2 |
1.0 |
Production range: DN25-DN1600 mm Annual production capacity: 1000 km Max nominal pressure: 2.5 MPa Normal continuous medium temperature: ≤120 ℃ Execution standard: T/CDHA 1-2013
Production Process
· Raw material inspection
· Work pipe transfer
· Outer-jacket penetration and plug-in installation
· Polyurethane extrusion(Raw material: isocyanate, polyether polyol)
· Unplugging
· Pipe-end cutting and cleaning
· Finished-product inspection and marking
· Finished-product warehousing
FAQ
Q: What installation modes are suitable for this district heating insulated pipe?
A: It supports overhead laying, trench laying and installation inside integrated pipe gallery. Direct-buried laying is not applicable. Composite insulation structure shall be adopted if continuous-running medium temperature exceeds 120 ℃.
Q: Can I choose different outer-jacket materials for site corrosion environment?
A: Color steel sheet, hot-dip galvanized steel sheet, aluminium sheet and stainless steel sheet are available for selection according to actual site corrosion conditions.
Q: What operating limits should be noticed?
A: Max nominal pressure is 2.5 MPa. Under normal working condition, continuous medium temperature shall not exceed 120 ℃.
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