Gas metering stations (GIS)

Purpose of gas metering stations Gas metering stations (GMS) are designed for continuous automatic measurement of the gas flow rate passing through the metering pipelines, with the determination of its component composition and calorific value. Methods of measurement: measurement of gas consumption by measuring the variable pressure drop across the restriction devices (BSU). To do this, a gas flow meter is installed on each measuring pipeline, complete with differential pressure, pressure and temperature sensors; measurement of gas flow by an ultrasonic method based on the phenomenon of displacement of a sound vibration by a moving medium using an ultrasonic flow meter. standard conditions with the help of a corrector of your choice: Floboss 107, SuperFlow, ERZ 2004, etc. Measurement of absolute and differential pressures, as well as gas temperature is performed by sensors. To account for the qualitative composition of gas, the GIS is equipped with chromatographs, calorimeters, an analyzer of the dew point temperature of hydrocarbons and water. The GIS includes the following units, blocks and systems: Block of measuring lines Block of measuring lines (BIL), which includes: collectors of above-ground or underground execution; flow transducers (main and redundant), which are used as ultrasonic flow transducers (USPR) and quick-change orifice devices (BSU); gas flow control system (optional); measuring lines, working and backup, with straight sections located immediately before and after flow converters; shut-off valves with electro-pneumatic or electric drives; auxiliary equipment and devices ( flow straighteners, sampling probes, instrumentation equipment, a set of heated connecting pipelines).