Key Features
- Steel-HDPE composite structure enhances compressive strength
- Compatible with electrofusion welding processes
- Resistant to chemical corrosion and UV degradation
- Precise dimensional tolerances ensure sealing reliability
Typical Applications
- Medium/low-pressure gas pipeline junctions
- Underground gas pipeline rehabilitation
- Industrial fuel transfer systems
- Urban gas distribution networks
Manufacturing Process
Insert injection molding process (steel ring embedded in HDPE matrix)
- Melt temperature control: 210±5°C
- Steel ring surface preparation grade Sa 2.5
- Interfacial bond strength ≥25 N/mm²
- Cooling rate gradient management
Raw Material Characteristics
- PE100 RC: MRS 10 MPa (ISO 9080)
- Slow crack growth resistance ≥500h (ISO 13479)
- Steel ring yield strength ≥235 MPa
- Melt flow index (190°C/5kg): 0.3–0.5 g/10min
- Reinforcement of electrofusion tees in natural gas pipelines
- LPG storage terminal piping connections
- Urban gas network retrofit projects
- Industrial gas meter installation junctions
