Langdon Double Wall Ductwork: Superior Solutions for Every Environment

Langdon offers an extensive range of double wall ductwork options, designed for durability and efficiency in various applications. Our products include:

  • Double Wall Round Ductwork
  • Double Wall Spiral Ductwork
  • Double Wall Rectangular Ductwork
  • Double Wall Flat Oval Ductwork

All our double wall duct and fittings are available in both spiral lockseam and longitudinal seam configurations, ensuring flexibility to meet your project specifications.

Innovative Features

  • Sure Seal Spiral: This transverse joint gasketed connection enhances the integrity of double wall spiral ductwork, ensuring airtight performance.

  • Material Options: Our double wall ducts are constructed from galvanized sheet metal, featuring inner fiberglass insulation. For enhanced protection, we also offer:

    • Acrylic Coated Insulation: This option resists air erosion of fibers and inhibits the growth of fungi and bacteria.

  • Custom Fabrications: We provide double wall ductwork with:

    • Inner Perforated Metal Liner: Ideal for sound attenuation.
    • Inner Solid Metal Liner: For increased strength and durability.
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18 Gauge Stainless Steel Welded Double Wall with 2" Liner

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22 Gauge Galvanized Double Wall Ductwork

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18 Gauge Galvanneal Double Wall Ductwork

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22 Gauge Galvanized Double Wall Ductwork

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Aluminum Sure Seal Double Wall Lateral

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.050 Type 3003 Aluminum Double Wall Duct with TDC connection. Aluminum 3003 Definition – General purpose alloy for moderate strength applications. 20% strength increase over 1100 with same good forming, weld ability and corrosion resistance. Used for gene

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.050 Type 3003 Aluminum Double Wall Rectangular Duct with TDC connection. Aluminum 3003 Definition – General purpose alloy for moderate strength applications. 20% strength increase over 1100 with same good forming, weld ability and corrosion resistance. U

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.050 Type 3003 Aluminum Rectangular Double Wall Ductwork with TDC connection. Aluminum 3003 Definition – General purpose alloy for moderate strength applications. 20% strength increase over 1100 with same good forming, weld ability and corrosion resistance. Used for general sheet metal work.

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22 Gauge Type 304 Stainless Steel Double Wall Elbows with Slip connection. Stainless Steel 304 Definition – This basic 18 chrome/8 nickel stainless steel is the most versatile and widely used austenitic grade. It has excellent drawing and forming characteristics and provides excellent resistance to a wide range of corrosives. It also has good elevated temperature properties and excellent toughness at cryogenic temperatures.

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20 Gauge Type 304 Stainless Steel Double Wall Ductwork and Fittings with Companion Flange connection. Stainless Steel 304 Definition – This basic 18 chrome/8 nickel stainless steel is the most versatile and widely used austenitic grade. It has excellent drawing and forming characteristics and provides excellent resistance to a wide range of corrosives. It also has good elevated temperature properties and excellent toughness at cryogenic temperatures.

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20 Gauge Galvanneal Double Wall Spiral with Accuflange Connection. Galvanneal Definition - Heat treating process alloys galvanized zinc coating to steel and provides good surface for immediate painting. No spangle to show through. Withstands temperatures to 750 degrees F without flaking - unlike ordinary galvanized. A60 and A40 coating available.

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20 Gauge Galvanneal Double Wall Damper with Accuflange Connection. Galvanneal Definition - Heat treating process alloys galvanized zinc coating to steel and provides good surface for immediate painting. No spangle to show through. Withstands temperatures to 750 degrees F without flaking - unlike ordinary galvanized. A60 and A40 coating available.

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20 Gauge Galvanneal Double Wall Elbow with Accuflange Connection. Galvanneal Definition - Heat treating process alloys galvanized zinc coating to steel and provides good surface for immediate painting. No spangle to show through. Withstands temperatures to 750 degrees F without flaking - unlike ordinary galvanized. A60 and A40 coating available.

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22 Gauge Galvanneal Double wall Square to Round with Accuflange Connection. Galvanneal Definition - Heat treating process alloys galvanized zinc coating to steel and provides good surface for immediate painting. No spangle to show through. Withstands temperatures to 750 degrees F without flaking - unlike ordinary galvanized. A60 and A40 coating available.

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Double Wall Ductwork and Fittings used throughout the Vessel.

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Double Wall Ductwork and Fittings Used throughout the Vessel.

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Double Wall Ductwork and Fittings Used throughout the Vessel.

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24 Gauge Galvanized Double Wall Spiral Ductwork. Galvanized Definition - Continuous hot dip process bonds zinc coating to steel. Forms and bends without flaking. A versatile, low cost, corrosion resistant steel. G90 and G60 coatings available per ASTM A525.

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18 Gauge Galvanized Double Wall Rectangular Fresh Air Intake. Galvanized Definition - Continuous hot dip process bonds zinc coating to steel. Forms and bends without flaking. A versatile, low cost, corrosion resistant steel. G90 and G60 coatings available per ASTM A525.

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18 Gauge Galvanized Double Wall Oval Fittings with Accuflange Connections. Galvanized Definition - Continuous hot dip process bonds zinc coating to steel. Forms and bends without flaking. A versatile, low cost, corrosion resistant steel. G90 and G60 coatings available per ASTM A525.

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22 Gauge Galvanized Double Wall Spiral Ductwork with Rectangular Takeoff. Galvanized Definition - Continuous hot dip process bonds zinc coating to steel. Forms and bends without flaking. A versatile, low cost, corrosion resistant steel. G90 and G60 coatings available per ASTM A525.

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18 Gauge Galvanized Double Wall Rectangular Ductwork with TDC connection.Galvanized Definition - Continuous hot dip process bonds zinc coating to steel. Forms and bends without flaking. A versatile, low cost, corrosion resistant steel. G90 and G60 coatings available per ASTM A525.

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18 Gauge Galvanized Double Wall Transitions with TDC connections. Galvanized Definition - Continuous hot dip process bonds zinc coating to steel. Forms and bends without flaking. A versatile, low cost, corrosion resistant steel. G90 and G60 coatings available per ASTM A525.

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24 Gauge Type 316 Stainless Steel Double Wall Transition with TDC connection. Stainless Steel 316 Definition – The addition of molybdenum and higher nickel content give 316 better corrosion and pitting resistance than 304 plus higher strength at elevated temperatures. Used for pumps, valves, textile and chemical equipment, pulp/paper and marine applications.

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18 Gauge Galvanized Double Wall Spiral Ductwork with Angle Ring Connections. Galvanized Definition - Continuous hot dip process bonds zinc coating to steel. Forms and bends without flaking. A versatile, low cost, corrosion resistant steel. G90 and G60 coatings available per ASTM A525.

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18 Gauge Galvanized Double Wall Square to Round. Galvanized Definition - Continuous hot dip process bonds zinc coating to steel. Forms and bends without flaking. A versatile, low cost, corrosion resistant steel. G90 and G60 coatings available per ASTM A525.

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18 Gauge Galvanneal Double Wall Elbow with Companion Flange connection. Galvanneal Definition - Heat treating process alloys galvanized zinc coating to steel and provides good surface for immediate painting. No spangle to show through. Withstands temperatures to 750 degrees F without flaking - unlike ordinary galvanized. A60 and A40 coating available.

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20 Gauge Galvanized Double Wall Elbow with Perforated Inner Core and Angle Ring connection. Galvanized Definition - Continuous hot dip process bonds zinc coating to steel. Forms and bends without flaking. A versatile, low cost, corrosion resistant steel. G90 and G60 coatings available per ASTM A525.

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20 Gauge Galvanized Double Wall Spiral Ductwork with Perforated Inner Core and Angle Ring connection. Galvanized Definition - Continuous hot dip process bonds zinc coating to steel. Forms and bends without flaking. A versatile, low cost, corrosion resistant steel. G90 and G60 coatings available per ASTM A525.

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22 Gauge Galvanized 1" Double Wall Spiral Ductwork - Fabrication Step 1. Galvanized Definition - Continuous hot dip process bonds zinc coating to steel. Forms and bends without flaking. A versatile, low cost, corrosion resistant steel. G90 and G60 coatings available per ASTM A525.

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22 Gauge Galvanized 1" Double Wall Spiral Ductwork - Fabrication Step 2. Galvanized Definition - Continuous hot dip process bonds zinc coating to steel. Forms and bends without flaking. A versatile, low cost, corrosion resistant steel. G90 and G60 coatings available per ASTM A525.

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22 Gauge Galvanized 1" Double Wall Spiral Ductwork - Fabrication Step 3. Galvanized Definition - Continuous hot dip process bonds zinc coating to steel. Forms and bends without flaking. A versatile, low cost, corrosion resistant steel. G90 and G60 coatings available per ASTM A525.

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22 Gauge Galvanized 1" Double Wall Spiral Ductwork - Fabrication Step 4. Galvanized Definition - Continuous hot dip process bonds zinc coating to steel. Forms and bends without flaking. A versatile, low cost, corrosion resistant steel. G90 and G60 coatings available per ASTM A525.

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20 Gauge Galvanized Double Wall Spiral Elbow. Galvanized Definition - Continuous hot dip process bonds zinc coating to steel. Forms and bends without flaking. A versatile, low cost, corrosion resistant steel. G90 and G60 coatings available per ASTM A525.

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22 Gauge Galvanized Double Wall Oval Ductwork with Slip connection. Galvanized Definition - Continuous hot dip process bonds zinc coating to steel. Forms and bends without flaking. A versatile, low cost, corrosion resistant steel. G90 and G60 coatings available per ASTM A525.

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16 Gauge Type 304 Stainless Steel Double Wall Fittings. Stainless Steel 304 Definition – This basic 18 chrome/8 nickel stainless steel is the most versatile and widely used austenitic grade. It has excellent drawing and forming characteristics and provides excellent resistance to a wide range of corrosives. It also has good elevated temperature properties and excellent toughness at cryogenic temperatures.

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24 Gauge Galvanized Double Wall Spiral Ductwork with Angle ring Connections. Galvanized Definition - Continuous hot dip process bonds zinc coating to steel. Forms and bends without flaking. A versatile, low cost, corrosion resistant steel. G90 and G60 coatings available per ASTM A525.

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22 Gauge Galvanized Double Wall Oval Ductwork with Rectangular Tap and Angle Ring connection. Galvanized Definition - Continuous hot dip process bonds zinc coating to steel. Forms and bends without flaking. A versatile, low cost, corrosion resistant steel. G90 and G60 coatings available per ASTM A525.

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24 Gauge Galvanneal Double Wall Fittings with Slip connection. Galvanneal Definition - Heat treating process alloys galvanized zinc coating to steel and provides good surface for immediate painting. No spangle to show through. Withstands temperatures to 750 degrees F without flaking - unlike ordinary galvanized. A60 and A40 coating available.

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24 Gauge Galvanneal Double Wall Spiral Ductwork with Slip connection. Galvanneal Definition - Heat treating process alloys galvanized zinc coating to steel and provides good surface for immediate painting. No spangle to show through. Withstands temperatures to 750 degrees F without flaking - unlike ordinary galvanized. A60 and A40 coating available.

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22 Gauge Galvanneal Double Wall Fittings with Slip connection. Galvanneal Definition - Heat treating process alloys galvanized zinc coating to steel and provides good surface for immediate painting. No spangle to show through. Withstands temperatures to 750 degrees F without flaking - unlike ordinary galvanized. A60 and A40 coating available.

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22 Gauge Galvanneal Double Wall Spiral Ductwork. Galvanneal Definition - Heat treating process alloys galvanized zinc coating to steel and provides good surface for immediate painting. No spangle to show through. Withstands temperatures to 750 degrees F without flaking - unlike ordinary galvanized. A60 and A40 coating available.