GRP Backing Rings for Thermoset (GRP) pipe systems
Product specification
Glassfiber Reinforced Vinylester (GRV) Backing Rings made by Resin Transfer Molding (RTM) are corrosion free, high performance products, suitable for both Thermoplastic and Thermoset pipe systems. The RTM manufacturing technology is a closed mold manufacturing method, ensuring high fiber content and high performance laminates, capable to handle high mechanical loads.
Composite Backing Rings are a very good and competitive alternative for Stainless Steel alloys (SS 304 / SS 316 / Duplex), are light weight compared to steel and easy to handle. The Backing Rings are having specific inner diameter to meet the dimensions of PE, PP, PVC and GRP stub flanges of the pipe system.
Specifications of Composite Backing Rings:
- Resin : Bisphenol A based Vinylester Derakane 411 or equivalent
- Glass reinforcement : E-glass Multi Axial fabric, quantity and build up as per Rotec product design
- Core : Vinylester bonded silica particles, core dimensions as per Rotec product design
- Fiber content glass laminate : 60 % (+/- 3) by weight
- Color : Black, Grey or off-white
- Maximum operational temp.: 80°C.
- UV resistant
- Max. Working Pressure in pipe system : as specified on product drawing
- Max. Test Pressure in pipe system: as specified on product drawing
The allowable operating temperature can be increased to 110°C. if required (at cost).
The inside diameter of Backing Rings can be modified as per customers’ requirements.
All flanges available with drillings according to different Standards: EN 1092 / ASA / ANSI / JIS / AWWA / AS 4087
| GRP/SMC Backing Rings suitable for GRP pipe systems DN15 - DN300 |
| Backing Ring (to suit GRP Stub) with drillings according to EN1092-1 PN10 More info |
| Backing Ring (to suit GRP Stub) with drillings according to EN1092-1 PN16 More info |
| Backing Ring (to suit GRP Stub) with drillings according to ASA 150 / ANSI B16.47 Class 150 More info |
| Backing Ring (to suit GRP Stub) with drillings according to JIS 10K More info |
| GRP/RTM Backing Rings suitable for Rotec Stub Flanges / GRP pipe systems DN200 - DN2400 |
| Backing Ring RTM (to suit GRP Stub) with drillings according to EN1092-1 PN10 More info |
| Backing Ring RTM (to suit GRP Stub) with drillings according to EN1092-1 PN16 More info |
| Backing Ring RTM (to suit GRP Stub) with drillings according to ASA 150 More info |
| Backing Ring RTM (to suit GRP Stub) with drillings according to ANSI B16.47 Class 150 More info |
| Backing Ring RTM (to suit GRP Stub) with drillings according to ASA 300 More info |
| Backing Ring RTM DN200 - DN1000 with dimensions according to DIN16966 Teil6 (not suitable for Rotec Stub Flanges) More info |
| GRP - RTM/SMC Backing Rings according to BAYER WERKNORM DN25 - DN400 |
| Backing Ring according Bayer Standard WN9901-12 with drillings according to EN1092-1 PN10 (DIN 2501 PN10) More info |