The HDPE Electro Fusion Steel Backing Ring for EF Fittings for Fuel Gas is a steel-reinforced HDPE backing ring designed to enhance the compressive strength and sealing reliability of electrofusion joints in fuel gas pipelines.
| Specifications DN |
Item |
OD (mm) |
ID (mm) |
BOLT ID (mm) |
T (mm) |
| 50 |
AFST 50 |
140 |
69 |
18 |
12 |
| 63 |
AFST 63 |
155 |
84 |
18 |
12 |
| 75 |
AFST 75 |
175 |
100 |
18 |
12 |
| 90 |
AFST 90 |
190 |
116 |
18 |
15 |
| 110 |
AFST 110 |
210 |
144 |
18 |
15 |
| 160 |
AFST 160 |
275 |
199 |
23 |
16 |
| 200 |
AFST 200 |
330 |
247 |
23 |
18 |
| 250 |
AFST 250 |
385 |
303 |
23 |
20 |
| 315 |
AFST 315 |
435 |
367 |
23 |
20 |
Key Features of HDPE Electro Fusion Steel Backing Ring for EF Fittings for Fuel Gas
- Steel-HDPE composite structure enhances compressive strength.
- is compatible with electrofusion welding processes.
- Resistance to chemical corrosion and UV degradation protects.
- Precise dimensional tolerances ensure sealing reliability.
Manufacturing Process of HDPE Electro Fusion Steel Backing Ring for EF Fittings for Fuel Gas
Each is produced by insert injection molding with the steel ring embedded in HDPE matrix.
Critical Process Parameters of HDPE Electro Fusion Steel Backing Ring for EF Fittings for Fuel Gas
- 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 of HDPE Electro Fusion Steel Backing Ring for EF Fittings for Fuel Gas
- PE100 RC: MRS 10 MPa (ISO 9080)
- Slow crack growth resistance ≥500h (ISO 13479)
- Steel ring yield strength ≥235 MPa
- Melt flow index: 0.3–0.5 g/10min (190°C/5kg)
Typical Applications of HDPE Electro Fusion Steel Backing Ring for EF Fittings for Fuel Gas
- reinforces electrofusion tees in natural gas pipelines.
- is used in LPG storage terminal piping connections.
- is installed in urban gas network retrofit projects.
- is used at industrial gas meter installation junctions.
Application Scenarios of HDPE Electro Fusion Steel Backing Ring for EF Fittings for Fuel Gas
- Reinforcement of electrofusion fittings in fuel gas pipelines — is the standard backing ring for these applications.
