PE Injection Molded Backing Ring
The PE Injection Molded Backing Ring is a precision-molded sealing and support component designed for PE flange connection systems. Manufactured from high-quality virgin HDPE material through one-piece injection molding technology, the product provides reliable sealing, pressure resistance, vibration absorption, and alignment support for flange assemblies.
Installed between two flange faces, the PE Injection Molded Backing Ring helps improve sealing stability while reducing the impact of vibration, pressure fluctuations, and pipeline misalignment during operation.
The product is widely used in:
- PE water supply pipelines
- Gas transmission systems
- Chemical fluid transport
- Agricultural irrigation projects
- Industrial piping systems
It is an essential accessory for secure and stable PE flange connections.
The product complies with major international and domestic standards, including:
- GB/T 15558
- GB/T 13663
- ISO 4427
- ISO 4437
Technical Specifications
|
Item |
Specification |
|
Product Name |
PE Injection Molded Backing Ring |
|
Material |
PE80 / PE100 HDPE |
|
Production Process |
One-Piece Injection Molding |
|
Function |
Sealing / Cushioning / Alignment Support |
|
Size Range |
DN32 – DN355 |
|
SDR Rating |
SDR11 / SDR17 |
|
Oxidation Induction Time (210°C) |
≥ 20 min |
|
MFR Change After Processing |
≤ 20% |
|
Standards |
GB/T 15558, GB/T 13663, ISO 4427, ISO 4437 |
|
Color |
Black |
Product Features & Benefits
Excellent Sealing Performance
The backing ring is manufactured with a smooth and uniform surface structure that fits tightly against flange contact faces, effectively sealing connection gaps and preventing fluid or gas leakage.
Its reliable sealing capability significantly improves the overall performance of flange-connected PE pipeline systems.
Fast & Simple Installation
Lightweight and flexible construction allows easy positioning during flange assembly without requiring complicated tools or installation procedures.
The PE Injection Molded Backing Ring helps improve installation efficiency while reducing labor intensity and assembly time on site.
Pressure Resistance & Vibration Absorption
The material offers excellent flexibility and resilience, helping absorb pipeline vibration and pressure shocks caused by water hammer or gas flow fluctuations.
This reduces:
- Flange loosening
- Connection displacement
- Mechanical stress on pipeline joints
- Long-term wear at flange interfaces
The result is a more stable and durable piping connection.
Corrosion & Weather Resistance
Made from high-density polyethylene, the PE Injection Molded Backing Ring delivers outstanding resistance against:
- Acid and alkali corrosion
- Soil chemicals and moisture
- Rust and oxidation
- UV exposure and environmental aging
Unlike traditional metal sealing components, it will not corrode, harden, crack, or deform under long-term outdoor or underground service conditions.
Accurate Dimensions & Strong Compatibility
Produced according to standardized specifications, the backing ring is designed to precisely match corresponding PE flanges and pipe fittings.
Benefits include:
- Accurate flange alignment
- Easy installation
- Excellent compatibility with standard PE piping systems
- Reliable long-term sealing performance
Safe, Hygienic & Long-Lasting
Manufactured from non-toxic virgin PE material, the product complies with potable water transport requirements and contains no harmful substances.
Additional advantages include:
- Long-term aging resistance
- Low maintenance requirements
- Extended service life
- Reduced replacement costs over time
Typical Applications
The PE Injection Molded Backing Ring is suitable for a wide range of PE flange connection systems, including:
- Municipal water supply pipelines
- Urban gas distribution systems
- Chemical processing pipelines
- Agricultural irrigation networks
- Industrial fluid transportation
- Underground PE piping projects
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