Gas Flow Measurement at the main Fuel Gas Header At a refinery in Washington, USA, FLEXIM was asked to install a non-intrusive ultrasonic gas flow meter for measuring the main fuel gas header. The necessity to have a flow measuring point at this particular pipe was given due to the EPA greenhouse gas reporting standards. The motivation to choose FLEXIM as a supplier was also given due the fact, that the installation of an inline flow meter would have caused to cut open the pipe. As the particular pipe is the main fuel gas header to the refinery, such a cutting would have caused a complete refinery shut-down. The installation took place at a 16 inch (outer diameter) carbon steel pipe with 0.375 inches of wall thickness. The gas flowing inside is methane with some parts of hydrogen and is op

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