Fuel Gas Metering Module
Fuel gas metering module consists of metering devices DN150 PN100, instrumentation cabinet and process pipelines with shutoff valves. All this equipment is mounted on a frame.
Flow metering device DN150 PN100 is accomplished as flanged connections with pipe branches. Averaging chambers and orifice plate are installed between them.
Natural gas metering principle is based upon making local flow reducing with an orifice plate. Some part of flow potential energy is converted into kinetic energy. Average flow velocity increases in the point of reduction and static pressure becomes lower than the static pressure upstream of the orifice plate. The higher the flow rate is the higher pressure differential is. Thus, pressure differential can be used for metering purposes.