Round Angle Iron Flange / Galvanized Circular Duct Flange / Punched Round Flange
Round angle iron flange is a premium galvanized GI circular flange designed for bolted connections on spiral and round HVAC duct systems. Built with robust high-strength angle steel and anti-corrosion zinc coating, this punched round flange guarantees stable structural performance and extended service life for long-term ventilation operation. Equipped with precision punched bolt holes, it simplifies duct alignment and accelerates on-site installation while ensuring secure and airtight joint fastening. Available in a full size range of Ø100mm–Ø2000mm and customizable thickness, hole layout and overall dimensions, it fits various standard and custom circular duct specifications. Widely applied in spiral duct installations, general HVAC ventilation, exhaust systems and industrial air handling duct networks.
Product Description
The Round Angle Iron Flange is specifically designed for circular HVAC duct systems, providing a strong, stable, and airtight connection between spiral or round ducts. Made from high-quality galvanized steel, this flange ensures excellent corrosion resistance and long-term durability in various ventilation environments.
The flange is manufactured with precision-punched bolt holes for accurate alignment and fast installation. It is widely used in HVAC, air conditioning, and industrial ventilation systems.
Key Features
- Robust Construction: Made of high-strength galvanized angle steel for enhanced rigidity
- Corrosion Resistance: Zinc coating protects against rust and harsh environments
- Precision Punched Holes: Ensures easy alignment and secure bolted connection
- Wide Size Range: Available from Ø100mm to Ø2000mm (custom sizes supported)
- Flexible Thickness Options: Typically 2–5mm depending on diameter
- Customizable: Hole quantity, diameter, thickness, and dimensions can be tailored
Applications
- Spiral duct systems
- Round HVAC air ducts
- Ventilation and exhaust systems
- Industrial air handling systems
Specifications
- Material: Galvanized Steel (GI)
- Type: Round / Circular Flange
- Diameter Range: Ø100mm – Ø2000mm
- Thickness: 2mm – 5mm
- Hole Type: Punched bolt holes
- Connection Method: Bolted flange connection
- Surface Treatment: Pre-galvanized or hot-dip galvanized
Keywords
- Round Duct Flange
- Circular Flange
- Angle Iron Flange
- GI Flange
- Spiral Duct Flange
- HVAC Flange System
- Punched Flange Ring
