Hydrocarbon leak detection in tank farms

Wireless leak detection sensors check to see if hydrocarbons are leaking into a tank’s retention pond from overflows, valves, pumps and cracks.

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On December 10, 2005, Tank 912 at the Buncefield Oil Storage Depot in Hertfordshire, England, was filling with gasoline. According to a report by the European Process Safety Centre, the tank had two forms of level control: a gauge enabling personnel to monitor the filling operation; and an independent high-level switch (IHLS) which was meant to shut down operations automatically if the tank was overfilled. The first gauge stuck and the IHLS was inoperable, so there was no means to alert the control room staff that the tank was filling to dangerous levels. Eventually, large quantities of gasoline overflowed from the top of the tank. A bund retaining wall around the tank…

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State of Technology: control systems

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Our latest issue: July 2017

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Ask the experts: Hydrogen mass flow

How can we measure hydrogen for custody transfer? Must we cut into the pipe?

Q: My aromatic plant consumes hydrogen during startup. A dedicated line supplies hydrogen to the plant. I would like to install an instrument to measure the mass flow of the gas for billing purposes. What kind of flow measurement technology should be used? Since the plant is in operation, the…

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