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FRP/GRP DUCTING
FRP/GRP DUCTING
FRP/GRP ducting is engineered for safe and efficient transport of corrosive gases, fumes and vapors in industrial ventilation and environmental control systems. Unlike metallic ducting, which deteriorates in acidic, alkaline or moisture-rich conditions, FRP/GRP ducting provides long-term stability, excellent corrosion resistance and reliable airflow performance.
SREX Composites manufactures a full range of FRP/GRP ducting systems used in fume extraction, exhaust ventilation, scrubber interconnections and air-pollution-control applications. Our systems ensure consistent performance in industries that demand dependable non-metallic ducting for continuous operation.
Industrial Applicability
FRP/GRP ducting is widely used in:
- Chemical and petrochemical plant ventilation
- Acid and alkali fume extraction
- Scrubber inlet/outlet duct networks
- Battery and metal finishing exhaust systems
- Chlorination, bromination and halogen fume zones
- ETP and wastewater-treatment vent systems
- Pharmaceutical & API manufacturing ventilation
- Semiconductor corrosive gas extraction
- Mining / metallurgical process exhaust channels
These ducts ensure safe handling of corrosive gases where metal systems cannot withstand long-term exposure.
Why FRP/GRP for Ducting
- Excellent resistance to chemical vapors and corrosive fumes
- Stable operation in high-humidity or condensation-rich atmospheres
- Lightweight, reducing load on supports and structures
- Smooth internal bore for efficient airflow
- No rusting, pitting or internal scaling
- Low maintenance and long lifecycle
- Compatible with scrubbers, chimneys, blowers and filtration systems
Applications Within Environmental & Process Systems
- Wet scrubber interconnecting ducts
- Industrial exhaust manifolds
- VOC and hazardous fume removal systems
- Mist eliminator exhaust sections
- Process gas collection and transfer
- Emission-control and neutralization units
- Industrial air-handling and extraction systems
THERMOPLASTIC-LINED FRP/GRP DUCTING
For extreme fume and gas environments where elevated chemical resistance is required, SREX Composites manufactures thermoplastic-lined FRP/GRP ducting. These systems combine:
- A corrosion-resistant thermoplastic liner, and
- A reinforced FRP/GRP structural shell
This dual-layer construction provides exceptional resistance to aggressive vapors, halogen gases, mixed acids, solvent fumes and high-temperature exhaust streams.
Seamless vs. Non-Seamless Liners
To accurately represent the engineering capability:
- Seamless thermoplastic liners are available up to 300 mm diameter
These are produced as joint-free liners offering the highest level of internal corrosion resistance and smooth airflow characteristics. - For diameters above 300 mm, the thermoplastic liner cannot be seamless
Larger liners are fabricated using welding, thermoforming or segmental forming techniques and bonded to the FRP/GRP shell.
These non-seamless liners still provide excellent chemical resistance and allow manufacture of large-diameter ducting widely used in industrial ventilation systems.
Available Thermoplastic Lining Options
(All corrected to FRP/GRP terminology)
- HDPE-lined FRP/GRP ducting
- PP-lined FRP/GRP ducting / PPH-lined FRP/GRP ducting
- UPVC-lined FRP/GRP ducting / CPVC-lined FRP/GRP ducting
- PVDF-lined FRP/GRP ducting
- ECTFE-lined FRP/GRP ducting
- FEP-lined FRP/GRP ducting
- PFA-lined FRP/GRP ducting
These liners enable safe handling of:
- High-acid vapors (HCl, H₂SO₄, HNO₃)
- Halogen fumes (chlorine, bromine, fluorinated gases)
- High-temperature corrosive exhaust
- Cleanroom/semiconductor corrosive gases
- Strong oxidizing or permeation-prone vapors
Applications of Thermoplastic-Lined FRP/GRP Ducting
- High-acid fume extraction
- Tank ventilation and reactor off-gas ducts
- Caustic scrubber exhaust lines
- Chlorine, bromine and halogen ventilation systems
- High-temperature condenser venting
- Pure and semi-pure gas handling in pharma and semiconductor plants
- VOC, chemical and hazardous fume removal
Advantages of Thermoplastic-Lined FRP/GRP Ducting
- Superior corrosion and permeation resistance
- Non-contaminating inner surface
- Long service life even in extreme fume conditions
- Smooth internal airflow profile
- Configurable for large diameters and complex routing
- Compatible with all FRP/GRP duct supports and accessories
Ducting Accessories & System Components
(Already covered in Pipes & Fittings segment, not repeated.)
Available components include:
- Straight sections
- Elbows, bends, tees and wyes
- Transitions and reducers
- Dampers and diverter ducts
- Expansion joints
- Flanged connectors
- Support systems
Standards & Compliance
SREX FRP/GRP ducting systems conform to:
- ASTM-D-3982 (Reinforced Thermosetting Plastic Ducts)
- ASTM D2996 / D2310 (classification & filament wound standards)
- BS 4994 (non-metallic equipment and ducting guidelines)
- DIN standards for GRP ventilation components
Quality Assurance
Every ducting system undergoes:
- Dimensional and geometric accuracy checks
- Laminate quality and thickness verification
- Spark testing for lined ducts
- Leak-tightness and fitment inspection
- Documentation and batch traceability
Get More Details
Have a question about our FRP/GRP products? Need a custom solution or technical recommendation? Fill out the form below, and our engineering team will reach out with precise information tailored to your requirements.
We are here to serve you.
We’re here to support you with reliable FRP/GRP solutions engineered for industrial excellence. Whether you need technical guidance, custom manufacturing, quotations, or project collaboration — our team is ready to assist you.
+91 70431 70434
marketing@srexcomposites.com
Plot No. 27, Shri Hari Industrial Park, Sokhada, Rajkot, Gujarat, India – 360003