Double-flange and single-flange limit expansion joints mainly have differences in connection methods. Double-flange loose-fitting limit expansion joints use two flat or convex flanges as connection parts and are connected to the pipeline through bolts, which is more convenient to install, and it is not recommended to use this pipeline fitting as the connection body when there is sufficient manpower. Single flanges loose set limit expansion joint uses one piece of convex flange or flat flange seat connection parts, also connected by bolts, in the case of site construction conditions allow, you can choose this limit expansion joint, but the site to use electric welding for installation, the use of customers can choose according to the site conditions and design units after communication. In the past pipeline construction, there are mainly drawbacks such as pipeline expansion joint production, installation difficulties, large floor space, serious running and bubbling water phenomenon, large amount of softened hot water loss and frequent maintenance.
