It is known that the angle iron round flange plays a connecting role in the connection between the air ducts. With it, people can connect each air duct with the air duct and the valve, and the angle iron round flange is widely used in the HVAC. The connection of the pipeline has the characteristics of easy installation and durability. The angle iron round flange can guarantee 90-degree non-flapping to ensure that the diameter error does not exceed 1 mm and the screw holes can be interchanged freely.

        In addition, the appearance of the angle iron round flange has changed the appearance effect of the traditional steel flange air duct, and replaced the semi-mechanized or hand-fabricated flanged production process with a high-tech, automated flangeless production process; Noise and pollution to the environment have also reduced the quality problems in the project; a brand-new concept has been injected into the machining and installation operations of angle iron flanges.