August 2019

Special Focus: Valves, Pumps and Turbomachinery

Specify the pressure drop of a vent silencer

Industrial facilities, such as refineries and petrochemical plants, have many systems and equipment that must relieve steam or gases through discharge piping to the atmosphere to avoid overpressure and protect the installation.

Casado, E., Empresarios Agrupados (EEAA)

Industrial facilities, such as refineries and petrochemical plants, have many systems and equipment that must relieve steam or gases through discharge piping to the atmosphere to avoid overpressure and protect the installation. It is often necessary to add a silencer at the end of the discharge piping to reduce discharge noise. In addition to reducing the noise, the silencer provokes a pressure drop that may increase the backpressure in the discharge line and reduce the flowrate. This article explores how to calculate this pressure drop to specify the silencer to maintain the design flowrate. It focuses on the discharge of a safety valve because it is the more common case, but it also appl

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