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This section provides an overview for spiral ducts as well as their applications and principles. Also, please take a look at the list of 27 spiral duct manufacturers and their company rankings. Here are the top-ranked spiral duct companies as of December, 2024: 1.US Duct, 2.Langdon, Inc., 3.MKT Metal Manufacturing.
Table of Contents
Postdoctoral researcher, conducting research on the production of cathode composite particles for solid-state batteries in the Equipment Engineering Group of Osaka Prefecture University.
Belongs to the Resource and Energy Recycling Laboratory, Nagaoka University of Technology, and conducts research on the development of DDR-type zeolite membranes for CO2 separation and the capture of CO2 from digestion gas generated from sewage treatment plants.
https://researchmap.jp/eiji-hayakawa
Thesis
https://doi.org/10.3390/membranes11080623
http://www.ijcea.org/index.php?m=content&c=index&a=show&catid=109&id=1177
https://www.sciencedirect.com/science/article/abs/pii/S1387181119305529?via%3Dihub
https://www.sciencedirect.com/science/article/abs/pii/S138358661833154X?via%3Dihub
Spiral ducts are inexpensive ducts made by spiraling metal strips, taking advantage of the flexible nature of thin metal. Because spiral ducts are thin and lightweight, they are the most common type of duct used in various parts of buildings and factories.
Other types of ducts include bellows-type flexible ducts and ducts made of plastic such as polyvinyl chloride. Spiral ducts are used for air ducts unless there are special circumstances, as they are lighter and more affordable.
When cold or warm air is sent to a room for air conditioning, it is sent through spiral ducts. They are also used in air ducts for dust collection and smoke removal. They are often found in the ceilings and walls of buildings and factories.
Zinc steel plates are commonly used for general air conditioning, but spiral ducts made of stainless-steel plates are used where corrosion resistance, weather resistance, and even heat resistance are required.
There are also spiral ducts made of vinyl chloride coated on both sides of a steel plate, which are used in acidic atmospheres and other locations where metal is not resistant to corrosion.
Spiral ducts are made of spiral-rolled metal sheets, with the two ends stacked in a haze-fold formation. The structure of the spiral duct has a reinforcing effect, so even a duct with a thin wall thickness has high strength.
Spiral ducts are made by rounding metal plates to obtain a high degree of roundness and a smooth interior, which reduces the friction of air passing through the duct and allows for efficient airflow.
Straight pipes of spiral ducts can be connected to each other by using fittings and can also be branched in multiple directions by using branches. Spiral ducts of different diameters can also be connected by using special fittings, which can be used to control the air-blowing pressure. Of course, the airflow can also be controlled by installing a regulator.
There are two types of connection methods: plug-in type and flange type. The plug-in type is connected with a plug-in joint, fixed with screws, and sealed with aluminum tape, etc. The flange type can be installed directly on-site. This allows for direct installation on-site and easy fixation and angle adjustment. On the other hand, the flange method provides a stable connection and reproducibility even after connection and disconnection are made. For this reason, the flange method is suitable for high-pressure applications or where components need to be replaced frequently.
Spiral ducts are thin metal plates with high strength, are lightweight, and can be easily fixed to ceilings. Therefore, spiral ducts can be shaped flexibly according to the shape of the building, which speeds up the construction period.
Because of this low cost and ease of use, spiral ducts are used in a variety of locations.
*Including some distributors, etc.
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L&L fabrication, located in Fort Worth, Texas, is a manufacturer of HVAC metal products including a complete line of high velocity spiral pipes/ducts, and fittings with the state of art sheet metal equipment (coil line, DNC plasma cutters, and CAD stations) to meet the SMACNA duct construction standard. The company supplies angle rings, duct fabrication, kwikflange, spirals, and ducts as well as duct fabrications ranging from small sizes for commercial applications to large heavy gauge industrial projects. As part their training programs, the company provides plant tours, factory training, product testing, and complete literature for contactors and engineers.
US Duct, established 2013, located in Kernersville, is an American manufacturer of industrial ducts and industrial ductwork solutions that are used to serve various needs including dust extraction, industrial ventilation, and pneumatic conveying. The company offers fittings, gates, valves, industrial ductwork, custom fabrication, as well as performance components such as spark traps, flex hose, and rotary airlocks. These products have applications in laboratories, ventilation systems, woodwork dust collection, and food production lines. US Duct also provides resources including DuctQuote software, product design, testimonials, take-off designs, and product guides to their customers.
Pacific Duct Inc. was established in 1996 in Southern California and is a manufacturer of lock-seam, high-pressure spiral pipes, and fittings. The product portfolio of the company includes Round Ducts & Fittings, Rectangular Ducts, Custom Fabrication, Connectors & Hangers, Grilles & Registers, and many more. The company also has two online duct calculators where clients can calculate the rectangular duct to round equivalent and vice versa. The company has access to doors, zip ties, and other HVAC contractor supplies fully stocked in “Will Call” department of the company.
MKT Metal Manufacturing is an American sheet metal duct and HVAC products manufacturer founded in 2004 and based in York, Pennsylvania. The company offers various sheet metal ductwork products in different shapes and materials, as well as HVAC products and rooftop accessories that secure or protect exposed HVAC components and parts. Their products are utilized by clients in construction and architectural development, as well as in the medical and industrial sectors. MKT also provides custom fabrication services for demanding projects requiring high temperature, pressure, or corrosion resistance.
Spiral Manufacturing, established in 1962, and headquartered in Minneapolis, Minnesota, is a manufacturer and supplier of spiral pipe and high pressure products in various forms for project and industrial needs. Their product range includes spiral ducts, fittings, and accessories. These products are used in HVAC (Heating, Ventilation, and Air Conditioning) systems for efficient air distribution, ventilation, and ductwork installations in various residential, commercial, and industrial buildings for optimal airflow, energy efficiency, and improved indoor air quality in industrial and commercial settings.
Airside Sheet Metal was founded in 1992 and is known as a dominant ductwork fabricator in New Jersey and the East coast. With automated machines and manufacturing capabilities, the company offers spiral duct, rectangular ductwork, welded duct, flat oval spiral duct, as well as grease and dust collection ducts that conform with SMACNA and SPIDA guidelines. The company also offers many construction services including shop drawings for multiple trades, pre-construction laser scanning, full scope building information modelling coordination management, duct fabrications and installations in educational, industrial, government, as well as medical facilities.
DC Duct & Sheet Metal, LLC has its main office in Washington, DC, and the production facility is in Mount Rainer, Maryland. The company is a sheet metal fabricator and specializes in the manufacture of oval ducts, spiral duct, and fittings that are designed to meet the SMACNA standard. The company mainly serves Northern Virginia, Maryland, and District of Columbia, as well as offering their products throughout the US via common carrier at a nominal charge. They also stock spiral duct and fittings, and flat oval ducts that have many uses and applications in construction, mining, factories, and agriculture industries.
Aqel Sheet Metal is a New York-based company that manufactures commercial sheet metal products including grilles, ductwork, louvers, skylights, among others. The company also specializes in producing various products such as corrugated sheets, perforated or structural steel sheets, Q-Deckings, chimneys & chimney liners, refuse chutes, as well as HVAC duct systems that are all designed for customers’ project, as well as providing customer services through free consultation for custom fabrication and fabrications for trade.
Langdon, Inc., located in Ohio, United States, is a sheet metal fabricating company that has been producing ductwork and other products since 1966. The company supplies round, rectangular, oval, and spiral ductwork utilizing stainless steel, galvanneal, galvanized, aluminium, an PCD coated materials. These products have applications in air-pollution control, dust collection, and exhaust systems. The company accepts custom applications on customer specifications, and design unique products to meet their needs. Langdon operates under patented ductwork connections and manufacturing processes, having component parts as self-sealing spiral ductwork system.
COMERCIAL DUCT SYSTEMS, LLC (CDS) has its office in Thonotosassa, Florida, and specializes in manufacturing of all HVAC duct fabrications to meet the LEEDS STANDARDS for green construction projects. The company manufactures metal rectangular, oval, and spiral duct works, using galvanized steel, paintgrip, stainless steel, black iron, PVC coated, and aluminium. The company additionally offers welded duct that has application in grease exhaust, high pressure systems, and clean room technology. CDS also builds and installs various liner and inner walls including perforated inner wall with barrier, as well as single and dual wall duct systems.
Lindab AB, founded in 1959 and headquartered in Grevie, Sweden, is a manufacturer and distributor of ventilation products and systems. The company provides both individual components and complete indoor ventilation systems like air distribution, air diffusion and air control equipment. It also provides a range of roof, wall and rainwater systems in northern and eastern Europe. It also provides softwares for its ventilation systems and building products. The company has obtained ISO 9001 and 14001 certifications for quality and environmental management systems.
Novaflex Industries, established in 1977 and based in New Jersey, USA, is a manufacturer of hoses, ducts, and chimney products designed for the safe and efficient handling of materials. The product range includes hoses for material handling, chemicals, petroleum, food-grade applications, and mining, as well as steam and water hoses. Its products prevent spills and leaks by serving diverse sectors such as marine, food and beverage, petroleum, fire safety, and transportation.
Trelleborg AB, a company founded in 1905 and headquartered in Trelleborg, Sweden, is a manufacturer that provides solutions for extreme cold, heat, pressure, or the tremendous power of nature. The company offers a wide range of products, including Cassette Seal CSL 1500, Pneumatic seals, O-rings, and more. It also has a shop called Seals-Shop that offers various products, such as Rod and Piston Seals. It provides rubber wear liners with synthetic rubber and chemical resistance. It has received the Excellence in Quality 2018 Award and Certificate of Merit from Hyster-Yale Group. It serves various industries, including Aerospace, Agriculture, and more.
Industrie Plastiche Lombarde S.p.A., established in 1975 and headquartered in Besozzo, Lombardy, Italy, is an industrial hose designer, distributor, and manufacturer. The company's products include an extensive range of flexible hoses made of TPU, PVC, and other plastic materials that are designed for suction abrasive materials, extraction of air, fumes, and gases, and handling fluid. It also produces a small range of hose fittings, including clamps, reusable ferrules. These products are used in various industries, including food processing, agri-food production, and wastewater treatment.
Witzenmann Group, established in 1984 and headquartered in Troy, Michigan, United States, is a manufacturer and supplier of flexible metal connecting components. The company's products include metal hoses, expansion joints, and metal bellows. It also manufactures a range of automotive and aerospace components. These products are used in agricultural machinery, construction equipment, and rail vehicles. It also works with original equipment manufacturers to produce custom parts and components. It serves sectors that include transportation, residential building ventilation, and fire protection.
BSTFLEX Ningguo BST Thermal Products Co., Ltd, founded in 2011 and located in Ningguo City, Anhui, is a manufacturer and supplier of heat protection products. The company products include automotive heat shields, insulation blankets, fireproof ropes, heat sleeves, and needle insulation blankets. The products are used in welding, mining, defence, automotive, and marine industries. It offers custom services including printing, precision cutting, special packing, and die cutting. The company has certifications from ATC Test Reports for the products.
Unveren Inc., established in 1950 and headquartered in Adana, Turkey, is an industrial hose and ventilation system designer, manufacturer, and supplier. The company's products include industrial air cleaning units, exhaust gas extraction systems, and utility tables with ventilation (downdraft tables). It also offers mobile fans, oil mist filter units, and moving arms for hose and equipment handling. The company's services include timely order shipping, custom equipment production, and full original equipment manufacturing.
Huanyu Hose Co. Ltd., established in 2008 and headquartered in Taichung City, Taiwan, is an industrial hose designer, manufacturer, and supplier. The company's products include flexible suction, antistatic and electrically conductive suction hose, and abrasion-resistant suction hose. It also manufactures industrial tubes and accessories, including rubber connections, hose clamps, and hose insulation. These products are used in various industries, including pharmaceutical production, food processing, and woodworking, and have applications that include fume extraction, material conveying systems, and paint application systems. The company offers custom hose and tube production and full original equipment manufacturing services.
Tricoflex, established in 1957 and headquartered in Vitry-le-François, Champagne-Ardenne, France, is a flexible hose designer, manufacturer, and supplier. The company offers more than 60 different types of hose and 1,000 products. Its knitted, braided, and spiral flexible hose products include multipurpose reinforced, food-quality hose, antistatic hose specially designed for compressed air supplies, and industrial application heavy-duty hose with a rigid shock-proof wall. Customers can use the company's online quote system to configure and customized hose production requests.
AGI Fabricators, established in 1977 in the United States, is a manufacturer and supplier of quality metal fabrications and customized solutions. The company’s product range includes precision sheet metal components, enclosures, assemblies, and specialized metal structures. These offerings find applications across diverse industries such as aerospace, defense, electronics, and telecommunications. AGI Fabricators' devotion is reflected in their state-of-the-art manufacturing facilities and skilled workforce. By providing new designs, engineering expertise, and superior craftsmanship, AGI Fabricators plays a significant role in delivering dependable and great metal fabrication solutions to their clients.
MORRIS SHEET METAL CORP, an American-based company operated by Alpine 4 technologies Ltd., established in 1992 and located in Forth Wayne, designs and fabricates industrial ventilation systems, commercial ductwork, dust collectors, water furnaces, machine guards, architectural work, as well as kitchen hoods that conform with SMACNA and AFE standards for facility engineers. The company’s core products include cyclones, dust collectors, koolduct, chutes & guards, single/double wall round & oval spiral pipes, tanks, among others. The company also offers industrial, commercial, institutional, specialty, and custom metal fabrication services as well as product installations.
Ranking as of December 2024
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Langdon, Inc. |
10.8%
|
| 2 | US Duct |
10.8%
|
| 3 | L&L Fabrication |
9.9%
|
| 4 | MKT Metal Manufacturing |
9.9%
|
| 5 | Pacific Duct Inc |
9.0%
|
| 6 | COMMERCIAL DUCT SYSTEMS,LLC |
8.1%
|
| 7 | DC Duct & Sheet Metal LLC |
7.2%
|
| 8 | Airside Sheet Metal |
6.3%
|
| 9 | Aqel Sheet Metal |
6.3%
|
| 10 | NovaFlex Industries |
4.5%
|
Derivation Method
The ranking is calculated based on the click share within the spiral duct page as of December 2024. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
10 | 83.3% |
|
Sweden
|
1 | 8.3% |
|
China
|
1 | 8.3% |
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