Description

The Duct Flange Corner — also commonly referred to as a Duct Corner or Duct Flange Connector — is an essential mechanical component used in modern HVAC (Heating, Ventilation, and Air Conditioning) systems. Purpose-built to enhance both structural integrity and precision alignment, duct corners are specifically designed for use at the intersection points of rectangular ductwork, where they provide strong, stable, and airtight connections that are critical for maintaining system performance and operational efficiency.

These corners are fully compatible with TDF (Transverse Duct Flange) and TDC (Transverse Duct Connection) profile systems — the industry standards for rectangular duct flanging — allowing them to integrate seamlessly into both new installations and retrofit applications. Positioned at the critical meeting points of duct flange profiles, duct corners reinforce the frame of the ductwork, simplify assembly, and provide a standardized method for connecting sheet metal ducts in a way that ensures strength, longevity, and optimal airflow performance.

Beyond offering physical stability, duct corners are engineered to reduce vibration, minimize air leakage, and prevent mechanical fatigue at the connection points. This contributes significantly to the long-term reliability of the duct system, reducing maintenance needs and extending the service life of the entire HVAC network.

Key Features and Benefits

Premium-Grade Construction
Manufactured from high-quality materials such as galvanized steel, stainless steel, or aluminum, duct flange corners deliver outstanding strength, durability, and corrosion resistance. Each material option is carefully selected to meet the demands of various environmental conditions, including indoor climate-controlled spaces and outdoor installations exposed to weather and industrial pollutants.

Rigid and Airtight Joint Reinforcement
Duct corners provide firm mechanical support at the critical junctions of duct flanges, maintaining the shape and alignment of ductwork under operational stresses. Their precise, tight fit helps create an airtight seal, reducing the risk of air leakage and noise, while promoting energy-efficient airflow distribution across the HVAC system.

Streamlined Installation Process
Designed for ease and speed of assembly, duct corners can be quickly and securely fitted into standard TDF and TDC flange profiles. Their user-friendly design simplifies onsite installation, helps reduce labor time, and minimizes the need for specialized tools or procedures, which translates into lower project costs and faster turnaround times.

Available in Multiple Sizes
Duct corners are offered in a variety of standardized sizes — including 20mm, 30mm, and 40mm — to accommodate different duct configurations and project requirements. This wide size selection ensures suitability for applications ranging from compact ductwork in confined spaces to large-scale air distribution systems in commercial and industrial settings.

Superior Corrosion Resistance
Thanks to the use of corrosion-resistant materials and optional protective finishes, these corners are built to withstand harsh and humid environments. Whether installed in industrial plants, commercial kitchens, cleanrooms, or coastal regions, duct flange corners retain their mechanical strength and visual appearance over time, helping maintain the integrity of the HVAC system.

Customizable to Meet Specific Project Needs
To address the unique challenges of specialized HVAC installations, duct flange corners can be customized in terms of material thickness, coating type, and edge configurations. This level of flexibility enables designers, contractors, and engineers to tailor the component to suit both standard applications and complex, high-performance systems.

Enhances HVAC System Efficiency
By securing airtight and vibration-resistant connections between duct segments, duct corners minimize air leakage and energy losses. This contributes to improved thermal performance, balanced airflow distribution, and reduced strain on HVAC equipment, which together help lower energy consumption and operational costs.

Typical Applications

• HVAC ductwork for commercial and industrial buildings

• Ventilation systems in large public structures and residential complexes

• Cleanroom and laboratory air circulation systems

• Hospital and healthcare ventilation infrastructures

• Manufacturing facilities and process air management systems

• High-performance air handling units and climate control systems

• Commercial kitchens and food processing ventilation

• Specialized systems for harsh or corrosive environments