The female flange in aluminium compressed air piping is a piping connector featuring an internal thread on the end face of the flange. This flange design makes it possible to connect to pipes or fittings with external threads to achieve a tight connection and sealing of the pipes. In aluminium alloy compressed air piping systems, internal wire flanges are widely used in scenarios where two pipes or equipment need to be connected. Due to its internal thread design, it can ensure the sealing and stability of the connection and reduce the risk of gas leakage. Meanwhile, the use of aluminium alloy material also makes the female wire flange with light weight and good corrosion resistance, suitable for various environments and media.