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What is the difference between cavitation and flashing?

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Question added by MOHAMMAD IMTIYAZ UDDIN , Instrumentation Engineer , BOC
Date Posted: 2017/03/10
Waqar Ahmed
by Waqar Ahmed , Instrument Technician , ADNOC Gas Processing

Flashing is the first stage of cavitation. Flashing occurs in liquid flows when some of the liquid changes permanently into vapour. This is brought on by a reduction in pressure forcing the liquid to change to gaseous state. Bubbles can suddenly collapse or implode as the pressure increases down line, producing Cavitation.

Selvam Palaniappan
by Selvam Palaniappan , Senior Application Engineer , Emerson Automation Solutions

Cavitation:

This phenomenon will occur when the vapor pressure goes below the outlet pressure (P2) and recovers above the outlet pressure after some time. 

 

Flashing:

This phenomenon will occur only when the vapor pressure goes below outlet pressure and will not recover above the outlet pressure.

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