What is Flow-Induced Vibration?

Flow-induced vibration (FIV) occurs due to pressure pulsation in the flow that causes the pipe to vibrate. It occurs at susceptible locations where high velocities and substantial mass flows generate significant amounts of kinetic energy. This often results in the permanent deformation of pipes with a subsequent loss of product, assets, and revenue.

At WKC we have developed a tool that enables engineers and consultants to screen their piping systems for FIV against the Energy Institute Guidelines (2008).

Energy Institute Guidelines

In January 2008 the Energy Institute (EI) published the ‘Guidelines for the Avoidance of Vibration Induced Fatigue in Process Pipework’.

The EI Guidelines were published to help minimise the risk of vibration induced fatigue of process piping, intended to be used by engineers with no prerequisite vibration knowledge.

The EI method generates a Likelihood of Failure (LOF) score. The LOF is a form of scoring to be used for screening purposes. It should be noted the LOF is not an absolute probability of failure nor an absolute measure of failure.