FRP Flanges | Corrosion-Resistant Fiberglass Pipe Flanges - CNPS
CNPS FRP Flanges - corrosion-resistant fiberglass flanged connections engineered for harsh chemical, marine and industrial piping systems.
Product Overview
CNPS FRP flanges are high-strength glass fiber reinforced plastic flanges engineered to join, terminate and connect composite piping systems in demanding service environments. They are approximately 60% lighter than steel flanges while offering tensile strength up to 300 MPa, and they perform reliably across a temperature range of -40 deg C to 110 deg C. Their inherent corrosion resistance makes them suitable for harsh chemical environments, and the designed service life exceeds 25 years. Standard accessories are available and installation is straightforward, helping to reduce downtime during pipeline construction and maintenance.
Why Choose FRP Flanges?
- Approximately 60% lighter than steel flanges, reducing transportation and installation costs.
- Tensile strength up to 300 MPa for reliable pressure-load performance.
- Corrosion-resistant construction suited to chemical, wastewater and marine service.
- Documented operating range of -40 deg C to 110 deg C.
- Design service life exceeding 25 years, lowering replacement and maintenance costs.
- Connects to standard metal pipeline systems with appropriate gaskets and bolts.
CNPS FRP flanges are supplied in standard sizes to match fiberglass and composite pipelines, with standard accessories such as gaskets and bolts available. Flanges can be connected to standard metal pipeline systems using appropriate gaskets and bolts. Flange size, facing, drilling pattern and pressure class are configured per project - confirm the exact dimensions and drilling standard with CNPS for non-standard configurations.
- Chemical resistance: withstands corrosive acids and bases, ensuring pipeline integrity in chemical processing plants.
- Lightweight design: approximately 60% lighter than steel flanges, reducing transportation and installation costs.
- High strength: designed to withstand pressure loads with tensile strength up to 300 MPa.
- Long service life: designed service life exceeds 25 years, reducing replacement and maintenance costs.
- Marine durability: designed to withstand harsh marine conditions, extending lifespan and reducing maintenance in seawater desalination plants, offshore platforms and port facilities.
- Easy integration: connects to standard metal pipeline systems using appropriate gaskets and bolts, with standard accessories available.configurations.
Technical Specifications
| Item | Specification |
| Material | Glass fiber reinforced plastic (FRP) |
| Operating Temperature | -40 deg C to 110 deg C |
| Connection Type | Standard accessories (gaskets, bolts); connects to standard metal pipeline systems |
| Service Life | Over 25 years |
🔧Connection / Installation
FRP flanges are installed with standard bolting procedures. Position the appropriate gasket between the flange faces, align the bolt holes with the mating flange, and tighten the bolts progressively in a crisscross pattern to avoid uneven stress. Because the flange is lightweight, it can be handled without heavy lifting equipment. FRP flanges connect to standard metal pipeline systems using appropriate gaskets and bolts; for composite-to-composite joints the same procedure applies. Follow CNPS torque guidance for the specific flange size and avoid over-torquing (confirm values by model).
⚙️Applications
- Chemical processing plants
- Seawater desalination plants
- Marine pipelines, offshore platforms and port facilities
- Wastewater treatment systems
- Industrial piping systems
💎Project Customization
CNPS supports project-specific flange configurations - size, facing, drilling pattern, pressure class and gasket/bolt packages can be matched to the piping design. For non-standard drilling patterns or special service media, contact CNPS with your flange standard and dimensions so the correct configuration can be confirmed.
🎨Why CNPS
- Complete composite piping portfolio: CNPS flanges complement tees, elbows, reducers and couplings for fully integrated FRP piping systems.
- Documented performance: weight, strength, temperature and service-life data drawn from CNPS engineering documentation.
- Corrosion-first engineering: product design focused on chemical, marine and wastewater durability.
- Project support: customization and installation guidance backed by CNPS engineering service.
Frequently Asked Questions
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