Common Causes of Overpressure


Common causes of overpressure

below is a list of Common causes of overpressure in process operation.common causes of overpresure

  • Utility failures, including:
    • General power failure
    • Partial power failure
    • Loss of instrument air
    • Loss of cooling water
    • Loss of steam
    • Loss of fuel gas or fuel oil.
  • Loss of cooling duty, caused by:
    • Loss of quenching medium
    • Air cooled exchanger failure
    • Loss of cold feed
    • Loss of top or intermediate reflux
  • External fire
  • Mechanical equipment failure
  • Exchanger tube rupture
  • Upstream pressure relief
  • Runaway chemical reaction
  • Blocked outlets, such as:
    1. Blocked liquid outlet
    2. Blocked vapor outlet
  • Thermal expansion
  • Abnormal heat input
  • Abnormal vapor input
  • Loss of absorbent flow
  • Entrance of volatile material
  • Accumulation of non-condensables
  • Valve malfunction, such as
    • Check valve malfunction
    • Inadvertent valve operation (open/close/bypass)
    • Control valve failure fully open
    • Control valve failure fully closed.
  • Process control failure
  • Human error.

Any of the above causes warrant the installation of pressure relief instruments such as relief valves or bursting disks.

keywords; Potential causes of overpressure, common causes of overpressure

Next Post

Hazen-Williams equation

Hazen-Williams equation is a popular approach for the calculation of head loss of liquid in piping systems. In this method, Hazen-Williams coefficient is introduced to the equation, the coefficient eliminates the need for using Reynolds number. The Hazen-Williams coefficient is mainly used to account for the pipe roughness or efficiency.
Head loss calculation

By continuing to use the site, you agree to the use of cookies. more information

The cookie settings on this website are set to "allow cookies" to give you the best browsing experience possible. If you continue to use this website without changing your cookie settings or you click "Accept" below then you are consenting to this.