Badger service rated expansion joints are used to protect piping systems, fittings, and process equipment from damage caused by either pipe movement or distortion resulting from temperature changes.

Selection of the specific expansion joint best suited for a given job depends on knowledge of the application and operating conditions.  The  following operating conditions should be considered:

• Pressure

  Badger expansion joints are available in two series... the SR series, which is designed to operate at up to 50 psig; and the SRR series, which is designed with reinforcing rings to operate at significantly higher pressures.  Note that pressure ratings are a function of operating temperature, diameter and corrugation count.

   

• Movement

  The amount and direction of the piping movement determine the number of corrugations in the element and the design of control hardware.  Types of joint movement include:

  • axial movement ÜÛÞ
  • lateral deflection  ÝßÝ
  • angular rotation    ßÞ
  
  
  

   

• Temperatures

  The temperatures affect material strenghts and will be considered for bellows pressure capacity, hardware material thickness, flange and weld end thickness.  Movements are also a function of the temperature, which is considered when choosing the number of corrugations.

   

• Flow Media

  Whether the media is erosive, corrosive, or viscous is a consideration for hardware design and service life of the expansion joint.