The loose flange is sleeved on the pipe end by using a flange, a steel ring, etc., and the flange can be moved on the pipe end.
The loose flange is not in contact with the media due to being blocked by the steel ring or flange.
The loose flange is suitable for the connection and corrosion-resistant pipelines of non-ferrous metals such as steel and aluminum and stainless acid-resistant steel containers.