Pharma API Solvent Exhaust Requirements
In Pharmaceutical Active Pharmaceutical Ingredient (API) and bulk drug manufacturing plants, solvent extraction, crystallization, and fluid bed drying generate volatile organic solvent fumes (IPA, dichloromethane, ethyl acetate, THF, toluene) alongside corrosive acid vapors (HCl, thionyl chloride, SO2). Exhaust duct systems must meet three non-negotiable engineering mandates: fire retardancy, chemical corrosion immunity, and electrostatic spark prevention.
1. Engineering Anti-Static, Fire-Retardant (FR-AS) FRP Ducts
Nikunj Fibre Glass fabricates specialized Pharma-grade FRP ductwork conforming to Class 1 flame spread (ASTM E84) and NFPA 91 / NFPA 45 cleanroom fire standards:
- Static-Dissipative Inner Layer: Surface resistivity maintained strictly between 10^5 and 10^8 ohms/square by infusing conductive carbon nanoparticles, preventing electrostatic charge buildup during high-velocity gas transport.
- Antimony Trioxide Synergy: Brominated vinyl ester resins compounded with antimony trioxide synergists provide superior self-extinguishing flame resistance.
- Smooth Interior Gelcoat: Ultra-smooth inner surfaces eliminate particulate entrapment, condensation pooling, and bacterial adhesion, complying with cGMP hygiene standards.
2. Mechanical Duct Construction Standards
| Diameter Range (mm) | Minimum Wall Thickness | Flange Construction & Reinforcement |
|---|---|---|
| 100mm to 300mm | 4.0 mm | Integral molded FRP slip-on flanges with gusset plates |
| 350mm to 600mm | 5.5 mm | External circumferential stiffeners for negative pressure stability |
| 650mm to 1200mm | 7.0 mm + Stiffener rings | Heavy-duty structural flanges with continuous earth bonding straps |
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Learn more about our FRP Industrial Ducting and complete pollution control systems in Vapi.