• The piping system shall be reviewed to determine the location and type of expansion Joint suitable for the application.
  • The bellows material shall be specified and must be compatible with the flowing medium, external environment and the operating temperature.
  • Internal sleeves shall be specified in all applications involving flow velocities which could induce resonant vibration in the bellows or cause erosion of convolutions resulting insubstantially reduced bellows life.
  • The system design pressure and test pressure shall be specified realistically without adding orbituary safety factors.
  • The maximum, minimum and installation temperatures shall be accurately stated.
  • The movements to be absorbed by the expansion joint shall include not only piping elongation or contraction, but also movement of attached vessels, anchors etc. and the possibility of misalignment during installation.
  • The piping system drawings shall specify the location of all anchors, guides, supports and fixed points. Both the anchors and guides must be suitable for the highest pressures to be applied to the system.

In general, the most reliable and safe bellows expansion joint installations have always involved a high degree of understanding between the user and the manufacturer.