Product Description
FRP (Fiber-Reinforced Plastic) piping is extensively used in Flue Gas Desulfurization (FGD) systems due to its excellent corrosion resistance, low weight, and durability in harsh chemical environments.
1. Purpose of FRP Piping in FGD
Transports aggressive chemicals and slurries like:
Limestone slurry
Gypsum slurry
Acidic/alkaline process water
Oxidized slurry
Used in areas where metallic pipes would corrode quickly
2. Advantages of FRP Piping
High corrosion resistance to sulfuric acid, chlorides, and slurry.
Lightweight and easier to install compared to steel.
Low maintenance and longer service life.
Can be customized with various resin systems (e.g., vinyl ester, epoxy, polyester).
3. Construction Features
Layers:
Inner liner: Chemical-resistant resin (e.g., vinyl ester).
Structural layer: Reinforced with glass fibers .
Outer layer: UV and abrasion protection.
Joints: Usually flanged, laminated, or butt & strap joints.
Fittings: Elbows, tees, reducers, and customized bends are also made of FRP
4. Applications in FGD
Absorber inlet/outlet piping
Limestone slurry feed lines
Gypsum slurry discharge lines
Recirculation piping
Drain, vent, and overflow lines
5. Design Considerations
Pressure rating: Typically up to 10 bar depending on thickness and resin.
Temperature resistance: Generally up to 100C (based on resin type).
Abrasion resistance: Enhanced with special liners or using dual-laminate construction.