Externally Pressurized Expansion Joints

Externally Pressurized Expansion Joints                

          Our externally pressurized type expansion joint,in which the bellows elements are arranged so that they are exposed to the media on their external surface,and are therefore externally pressurized, is an ideal unit in a pipeline system.When large amounts of axial deflection are required in piping systems of relative high pressure,bellows which are internally pressurized have limitations due to the phenomenon called squirm.Externally pressuring a bellows eliminates squirm as a limitation to the design and permits the safe acceptance of large amounts of axial thermal expansion.This type of expansion joint has many other inherent advantages over internally pressurized bellows.