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What are Backpressure and Built-up Backpressure?

asked Aug 14, 2015 in Process by mobassey (1,250 points)

1 Answer

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answered Aug 15, 2015 by pparrene (1,410 points)

Backpressure: The pressure that exists at the outlet of a pressure relief device as a result of flow in the discharge system.  Backpressure can be either constant or variable.  Backpressure is the sum of the built-up and superimposed backpressures.

Built-up Backpressure: The increase in pressure in the discharge header that develops as a result of flow after the pressure relief device or devices open up.