Midstream

Midstream Glossary

Definitions of words and terms used in the gas processing industry.
For questions regarding incorrect/outdated entries or suggestion for adding additional terms, please contact Martin Erne

Term
Definition
Common Use Examples
vaporization

The thermodynamic conversion of liquid to a gaseous state.

Vaporization can be caused by the absorption of heat from the atmosphere, heating equipment, or from its own heat content when accompanied by a reduction in pressure.

vaporization loss

A reduction in liquid quantity due to a thermodynamic process converting the liquid to a gaseous state.

Vaporization occurs when liquid enters a warmer vessel or when the operating pressure is below the bubble point of the liquid, resulting in a decrease of liquid quantity.

vessel retention time

The amount of time a fluid remains in a vessel.

Vessel retention time can be used when sizing a separator to achieve equilibrium between the gas and liquid phases.

volatile

A substance's ability to vaporize or evaporate at normal temperatures and pressures.

Ethane is more volatile than propane.

volume-weighted average

The mean value of the space occupied by a substance.

The volume-weighted average was used to calculate prior period adjustments.

waste heat boiler

A specialized type of boiler that recovers heat from hot exhaust gases produced by industrial processes, like combustion or furnaces, and uses that heat to generate steam or hot water for further use.

Waste heat boiler increase the efficiency of the plant by reducing the net energy used by the plant.