Air Pollution Control Systems & Heavy Ductwork

Industrial processing plants, chemical factories, steel mills, and power generation facilities generate significant volumes of high-temperature exhaust, gaseous emissions, and airborne particulate matter during daily operations. To protect surrounding communities and comply with strict national air quality standards, facilities must install robust Air Pollution Control (APC) infrastructure—including heavy exhaust ductwork, wet scrubbers, baghouse dust collectors, and elevated discharge stacks.

Designing and fabricating industrial air handling infrastructure requires deep expertise in fluid dynamics, high-temperature metallurgy, structural support design, and corrosion prevention.

Engineering High-Performance Industrial Ductwork

Industrial exhaust ducting acts as the conduit carrying corrosive or hot process gases from manufacturing equipment to scrubbers and filtration units. Poorly designed ducting can lead to internal particulate settling, severe corrosion, gas leakage, and excessive pressure drops that overload fan drives.

Key engineering considerations for industrial ductwork include:

• Compliance with air design frameworks recognized by the Air & Waste Management Association (AWMA)
• Smooth internal bend geometries and expansion transitions to maintain optimal gas velocities and minimize pressure losses
• Integration of heavy-duty steel support frames and elevated trestles engineered to hold filtration units manufactured by global providers like Donaldson Company
• Flexible expansion joints and vibration isolators to absorb thermal expansion cycles without cracking structural welds

Material Selection for Aggressive Gas Environments

The chemistry and temperature of process gas dictate material selection. Carbon steel coated with specialized heat-resistant primers is suitable for dry, non-corrosive ambient air. However, acidic vapors, wet flue gases, or chemical emissions require 316L stainless steel, Hastelloy, or rubber-lined carbon steel ducting to prevent premature corrosion.

Turnkey Exhaust System Fabrication with SJEC

At SJEC, we specialize in fabricating custom stainless steel and carbon steel ducting, scrubber supports, structural trestles, and high-height exhaust stacks. Our fabrication processes follow strict quality management guidelines to support leak-tight performance and long-term structural reliability.

Learn more about our custom industrial equipment capabilities on our factory building page or reach out directly to SJEC.

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