Efftek Diagnostic Engineers



Condition Monitoring Services for Industry


“Vibration induced fatigue of process piping systems is an important and fundamental failure mechanism. Data published by the UK’s Health & Safety Executive (HSE) for the offshore industry has shown that in the UK Sector of the North Sea, fatigue/vibration failures account for 21 % of all hydrocarbon releases. Although overall statistics are not available for onshore facilities, available data for individual plants indicates that in Western Europe, between 10 % and 15 % of pipe work failures are caused by vibration induced fatigue.”

Guidelines were published by the Energy Institute in 2008 aimed at minimising the risk of incurring loss of containment from vibration induced fatigue failures of process plant pipe-work.

Benefits of following the good practice detailed in these guidelines include:
          · Compliance with statutory duty
          · Improved Health, safety and reliability
          · Reduced risk of product leakage
          · Minimised plant down time

The Energy Institute guidelines provide a very detailed method of data collection. Vibration levels are recorded using a single axis accelerometer connected to a portable data collector, with a required frequency range of 1 Hz to 300 Hz. The results are presented as a vibration spectra showing amplitude in units mm/sec of RMS velocity against frequency.

By comparing these measurements against the vibration assessment criteria detailed in the guidelines, the vibration is classified into one of three categories: Acceptable, Concern or Problem.


Efftek Engineers are available to carry out 'Proactive Assessments', which can be used to routinely assess all existing pipework on a site to ensure that good practice has been adopted and to identify possible areas of concern


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