Different from pipe-in-pipe manufacturing process, this polyurethane foam pipe adopts one-step integrated forming. Working steel pipe, optional FBE anti-corrosion layer, polyurethane foam insulation layer and extruded PE outer sheath are produced simultaneously. It is mainly used for direct-buried laying and also available for trench laying. Products are manufactured complying with GB/T50538-2020 and GB/T29047-2021 standards.
Product Parameters
|
Molding Process |
Steel Pipe Diameter |
Axial Eccentricity |
Minimum Protective-layer Thickness(mm) |
|
One-step |
φ48~φ114 |
±3 |
≥1.4 |
|
One-step |
φ159~φ377 |
±5 |
≥1.6 |
|
One-step |
＞φ377 |
- |
≥1.8 |
Production range: DN25-DN400 mm - Annual production capacity: 1200 km - Max allowable medium temperature: ≤120 ℃ - Execution Standard: GB/T50538-2020, GB/T29047-2021
Production Process
Raw material inspection
Shot blasting for rust removal
Steel pipe transmission
Deviation correction, outer-sheath extrusion control, pusher feeding, polyurethane foaming control, feeding of isocyanate & polyether polyol
Spray cooling
Pipe-end cutting and cleaning
Mark model & batch number, warehousing
FAQ
Q: What are the laying options for this polyurethane foam pipe?
A: Direct-buried laying is the primary application, trench laying is also acceptable. The medium operating temperature shall not exceed 120 ℃.
Q: Is FBE anti-corrosion layer available for selection?
A: Yes. FBE anti-corrosion layer is optional to improve anti corrosion performance of working steel pipe.
Q: What size range can you provide?
A: Production scope covers DN25-DN400 mm, annual capacity reaches 1200 km for bulk-order projects.
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