Flared flanging
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Lately, when I read about GB standards, I keep coming across the term \"flared flange\". What exactly does it mean? It would be best to include a drawing, thank you.
Proverb. It’s very simple: by utilizing the ductility of metal materials, flaring is like shaping the end of a pipe into a bell shape. Flanging means processing the flared end to resemble the butt-welding ring of a slip-on flange. So this needs to be viewed in conjunction with the drawings. You’ll understand it if you look at the flanged stubs in GB12459-2005 Steel Butt-Welded Seamless Fittings
It is clearly explained on the second floor: generally, a numerical control mechanical expansion method is used for this purpose. Such mechanical expansion rods have a conical section at their ends, and by using this expansion process, the heat exchange tubes are flanged, thereby enhancing the clamping force between the heat exchange tubes and the tube sheet
Flare flanging is an important method for testing the toughness and plasticity of pipe materials.