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Title: Flow Investigations On Free Vents
Author: K.G. Sivaprakash, As. Murali, Dr. V. Jayaraman
Source: 1999 International Symposium on Fluid Flow Measurement
Year Published: 1999
Abstract: This paper describes the test methodology and results of the flow test conducted on various pipe vent configurations. Free vents like long radius bend, mitre cut bend, canopy vent normally used in petroleum storage vessels, were tested for establishing its breathing capacity. Wire meshes of various porosity, were kept at the vent inlet to study its effect on the breathing capacity of the free vent. The tests were carried out in the suction mode so as to simulate the conditions as that during the outflow of petroleum products from the storage vessel. Suction pressure of 20, 25.3 and 30mm of water column was maintained inside the vessel during these flow tests, to establish the flow curve for each free vent. For some of the vents out-breathing flow capacity was established by operating the system in the pressure mode, so as to simulate the conditions of flow into the storage vessel.

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