FRP Backing Ring DN300 for GRP Pipes
Article BRP-300-344-06/10 · Drilling EN1092 PN10 · Working pressure up to 6 Bar
BRP-300-344-06/10
- Material: FRP (Fiber Reinforced Plastic)
- Pipe system: GRP
- Nominal size: DN300
- Max pressure: 6 Bar
- Drilling: EN1092 PN10
- Manufacturing: High-pressure Hot Pressing
Technical Specifications
| Property | Value |
|---|---|
| Article number | BRP-300-344-06/10 |
| Pipe system | GRP |
| Nominal diameter (DN) | 300 mm |
| Max working pressure | 6 Bar |
| Drilling standard | EN1092 PN10 |
| Pipe OD | N/A mm |
| Outer diameter (D) | 458 mm |
| Inner diameter (d1) | 344 mm |
| Inner stub OD (d10) | 343 mm |
| Radius (r1) | 6 mm |
| Bolt circle (k) | 400 mm |
| Bolt holes | 12 |
| Bolt hole diameter (d2) | 22 mm |
| Thickness (b1) | 38 mm |
| Material | FRP (Fiber Reinforced Plastic) |
| Manufacturing process | High-pressure Hot Pressing (SMC) |
| Quality | ISO 9001 certified |
About this Backing Ring
This BRP-300-344-06/10 is an FRP (Fiber Reinforced Plastic) Backing Ring designed for use behind GRP stub flanges in industrial piping systems. With a nominal size of DN300 and working pressure rated up to 6 Bar, it carries the bolt load on flanged connections to other equipment - pumps, valves, vessels, or matching steel flanges - without distorting the plastic pipe.
The drilling pattern matches EN1092 PN10, ensuring drop-in compatibility with industry-standard counter-flanges. Manufactured by high-pressure Hot Pressing using Sheet Molding Compound (SMC), this size range is produced at scale with consistent wall thickness, precise bolt-hole positioning and an excellent surface finish.
Like all FRP Backing Rings from BackingRing.com, this part is fully corrosion-free, lightweight relative to a metal equivalent, and intended for service in chemical processing, water and wastewater treatment, mining, marine and other demanding environments.
Common applications for DN300 GRP Backing Rings
- Connecting GRP pipe spools to flanged pumps, valves and instrumentation
- Tie-ins between GRP sections and steel/ductile-iron piping in mixed-material plants
- Replacement of corroded metal backing rings in saltwater or chemical service
- OEM equipment skid assemblies requiring a lightweight, non-rusting flange backing
Need a different size or pressure rating?
We manufacture FRP Backing Rings up to DN4000 in custom drilling patterns and pressure classes. Talk to our engineering team.