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Steel Angle Flanges for Ventilation Ducting

July 8, 2021

The steel angle flange refers to a connection component used in HVAC (heating, ventilation, and air conditioning) ducts and fume exhausting systems. Generally, it can be a circular flange with bolt holes made from a length of steel angle, or a rectangular flange with bolt holes made by welding several pieces of steel angles. Steel angle flanges are bolted up to connect the ventilation ducts and fittings.

Steel angle flanges

Large-diameter steel angle flanges for HVAC ducts, supplied to Israel.

Angle flange bending

The bending of a steel angle flange.

Welding of angle flange

The rectangular steel angle flange made by a welding process.

The steel angle flanges may be made from carbon steel with hot dipped galvanization or stainless steel 304. They are drilled with standard bolt holes and can be readily installed by tightening a set of fasteners. The circular steel angle flanges are usually made by a bending process. The rectangular steel angle flange is welded by 4 pieces of steel angles.

Circular HVAC duct

The circular ventilation spiral-welded ducts connected by steel angle flanges.

Rectangular venting ducts

The rectangular venting/ exhausting ducts for a factory.

SS HVAC ducting

The stainless steel HVAC ducting system, connected by ss304 angle flanges.

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