Stainless Steel
Ductwork
Corrosion-resistant stainless duct available as ready-to-ship parts or as a completely custom system design. Built in 304 and 316 from 2" to 144" for food, pharmaceutical, battery manufacturing, and heavy industrial facilities.
- Corrosion resistant
- Clamp-together or flanged
- Built to your spec
- Materials
- 304 / 316
- Gauges
- 10–28 ga
- Diameters
- 2"–144"
Manufacturing
Capabilities
Our stainless duct is available across a wide range of grades, finishes, and connection types so your system is right for the environment it runs in. Most stainless projects are custom built to your gauge, diameter, grade, finish and connection, not pulled from a catalog size.
Materials
304, 304L, 316, 316L
Gauges
10ga – 28ga
Diameters
2" – 144"
Welds
Buffed Smooth, Rough or Food Grade
Finishes
Electro Polish, #4, 2B
Connections
Clamp-together (rolled lip, flat lip, Tri-Clamp), flanged, or raw for butt weld
Performance, durability & longevity
Stainless steel ductwork provides exceptional strength, corrosion resistance, and long-term durability for industrial and commercial facilities, with options in multiple gauges, diameters, finishes, and connection styles for demanding applications.
When specifying stainless steel duct, the effectiveness and efficiency of the ductwork are key to performance, durability, and longevity. For optimal results, the gauge and size must meet your specific application requirements.
Our stainless steel ducting is built in 10 to 28 gauge and 2" to 144" diameters, with clamp-together or flanged connections. Our Quick-Fit® clamp-together line comes in 18 and 16 gauge from 8" to 24", and each part is built fully in the specified gauge, without lighter-gauge collars.
Our ducting systems feature laser or plasma-welded seams for smoother internal surfaces and enhanced leak resistance.
What your duct is up against
How stainless holds up to the chemistries common in battery, chemical and process plants.
| Chemistry | Attacks | Stainless solution |
|---|---|---|
| Acid gases & condensateHF, acid mist, NOx | Carbon steel, galvanized, glass, and stainless once condensate forms | 304/304L for dry service; 316L where condensate forms. Continuous full-penetration welds |
| Process solventsNMP, carbonates, IPA, acetone | Plastics, elastomers, sealants and adhesives | Not the weak point. No sealant in seams; gaskets matched to the solvent |
| Alkaline dust & mistLithium hydroxide & carbonate, caustic carryover | Aluminum and zinc coatings | No coating to strip; smooth interior with no seam pockets for dust |
Chemistry varies by process, so we confirm material, gasket and sealant choices against yours.
Engineered for demanding environments
Stainless steel ductwork is an essential solution for commercial businesses and large manufacturing facilities requiring medium to large industrialized applications. It offers the strength of galvanized and aluminum alternatives while providing superior corrosion resistance, making it ideal for demanding environments. See how stainless steel compares to galvanized ductwork.
In industries such as food processing and agriculture, stainless steel duct systems excel due to their specialized composition of iron, chromium, and nickel. This unique blend creates a resilient material that withstands highly acidic conditions while maintaining structural integrity. Stainless steel ducting also resists common environmental threats, including corrosion, mold, mildew, and moisture.
Designed for versatility, our stainless steel ductwork solutions accommodate both interior and exterior facility requirements with minimal maintenance and repair needs. These systems enhance energy efficiency while offering flexibility, allowing for easy relocation, reuse, and seamless integration with existing ductwork infrastructure.
Key advantages
- Superior corrosion resistance compared to galvanized or aluminum
- Withstands acidic and high-moisture environments
- Resists mold, mildew, and long-term environmental damage
- Versatile for both interior and exterior use
- Low maintenance, energy-efficient, and reusable
Where stainless ductwork is used
Clamp-together or flanged, matched to your pressure
Stainless duct is built with two main connection types, and the right one depends on the pressure your process runs at. Clamp-together suits lower-pressure dust and exhaust runs, and flanged is built for lines running at higher pressure. We match the connection to each run when we lay out your system.
For dust collection & exhaust
Rolled-lip stainless sections clamp together by hand, with no welding or caulking, so systems install fast and can be taken apart to relocate or expand.
- Dust and fume extraction
- Lower to moderate system pressures
- Fastest installation and easiest reconfiguration
For higher-pressure process lines
Many stainless process lines run at pressures a clamped joint isn’t built for. Flanged stainless duct bolts together over a gasket matched to your process chemistry, so the line stays sealed.
- Higher-pressure and process applications
- Rigid, sealed joints for long runs
- Can still be unbolted for service or changes
No caulking required
Clamp connections install fast with no sealant.
Pressure-ready flanges
Gasketed, bolted joints for higher-pressure lines.
Hygienic finish
Smooth, polished surfaces resist bacteria buildup and rust, and clean easily.
Adaptable
Both connection types can be taken apart to upgrade, relocate or expand.
Stainless Steel Duct Components
Quick-Fit® branches, clamps, elbows, blastgates and more, each built fully in 18 or 16 gauge stainless with no lighter-gauge collars.
Let our team design your stainless system
Industrial Ducting Systems proudly offers custom stainless steel ductwork and Stainless Plus solutions. Our team provides detailed CAD drawings for each connection point and customized project requirement lists with transparent budgetary quotes, so planning and installation stay on track.
- Professional CAD drawing
- Exact parts list
- Installation instructions
- Budgetary project quote
System design service at no charge
Tell us about your project and our design team will follow up with next steps.
Have a full layout? Use the design questionnaire →
FAQs: Stainless Steel Ducting
What types of stainless steel are used in ductwork, and what's the difference?
Our stainless steel ducting is available in 304, 304L, 316, and 316L grades. 304/304L are standard choices for general corrosion resistance, while 316/316L contain added molybdenum for stronger resistance to chlorides and acidic conditions, making them the preferred choice for food processing, pharmaceutical, or coastal environments.
What sizes and gauges does stainless steel ducting come in?
We supply stainless steel ducting in gauges from 10ga to 28ga and diameters from 2" to 144". The Quick-Fit® clamp-together line is available in 18ga and 16ga steel in diameters from 8" to 24", with each part built fully in the specified gauge rather than using lighter-gauge collars.
What industries benefit most from stainless steel ducting?
Food processing, pharmaceutical manufacturing, battery manufacturing, agriculture, chemical processing, and heavy industrial facilities commonly use stainless steel ducting because it resists corrosion, mold, and mildew while withstanding the highly acidic or high-moisture conditions common in these environments.
Which weld and finish options are available for sanitary stainless duct?
Stainless duct is available with buffed smooth, rough or food-grade welds, and in 2B, #4 or electropolished finishes. Food, beverage and pharmaceutical lines typically call for food-grade welds and a smoother finish that cleans easily during wash-downs. Our design team will match the weld and finish to your sanitation requirements.
Can stainless ductwork be installed outdoors or in coastal facilities?
Yes. Stainless resists moisture, mold and mildew, so it suits exterior runs as well as interior ones. Near the coast, or anywhere salt and chlorides are in the air, specify 316/316L, the grade built for chloride exposure.
Is stainless steel ductwork easy to install?
Yes. Clamp-together duct goes together without caulking, which cuts installation time, and flanged duct bolts together for higher-pressure lines. Laser- or plasma-welded seams also give a smoother interior and fewer leak points than traditionally welded duct.
Can stainless duct tie into a process line that already uses Tri-Clamp or flanged fittings?
Yes. Stainless duct can be built with rolled-lip, flat-lip or Tri-Clamp ends, flanged, or raw for butt welding, so new runs connect to existing process equipment and ductwork without adapters. Clamped and flanged runs can also be taken apart later to relocate or resize the system.
