GRP FRP Backing Rings for Thermoplastic pipe systems
Backing Rings by Resin Transfer Moulding and Hot Pressing offer an excellent competitive solution with very high and constant quality.
The dimensions comply with the specified safety standards for each particular pressure class. Various internal diameters are available, to match all types of Pipe.
GRV/SMC - Sheet Moulding Compound
GRV/SMC Backing Rings in vinylester resin. Different internal diameters to meet Stub Flange dimensionsfor GRP pipes (DIN 16966) as well as for PE, PP and PVC pipes (DIN 16963). The GRV/SMC Backing Rings are light weigth and resistant to weathering and chemical influences.
RTM - Resin Transfer Moulding
RTM Backing Rings in vinylester resin Derakane 411 or equivalent. Internal diameters to meet Stub Flange dimensionsfor GRP pipes(DIN 16966) as well as for PE and PP pipe systems (DIN 16963). Currently available from DN 200 mm through DN 1400 mm, with pressure ratings up to 16 bars.
Please select your type of Backing Ring:
Composite (GRV) Backing Rings
Glassfiber Reinforced Vinylester (GRV) Backing Rings made by Resin Transfer Molding (RTM) and Compression molding (CM/SMC) are corrosion free, high performance products, suitable for both Thermoplastic and Thermoset pipe systems. The RTM and CM/SMC manufacturing technology are closed mold manufacturing methods, 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
- Glass reinforcement : E-glass
- Core material (RTM Backing Ring): Vinylester bonded silica
- 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