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For questions regarding incorrect/outdated entries or suggestion for adding additional terms, please contact Martin Erne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
sweet gas

Gas which has no more than the maximum sulfur content defined by (1) the specifications for the sales gas from a plant; (2) the definition by a legal body such as the Railroad Commission of Texas.

synthetic gas (SG)

A term used to describe the gas product resulting from the gasification of coal and/or gas liquids or heavier hydrocarbons.

tail gas

Gas that is located downstream of a processing facility.

tail gate

The of a processing plant wherein the residue is last metered.

take-or-pay clause

A contractual term where a one party agrees to receive a minimum quantity of product for a specified timeline or accept penalty for the unused portion.

tank

A container for holding liquid product.

tanker

An ocean-going vessel designed for carrying product.

temperature correction factor

A factor for correcting volumes to that occupied at a specific reference temperature.

tender

A formal offer from regulatory bodies, vendors, or companies provide or ship products or resources from wellheads, processing plants, or other sources.

theoretical gallons

The theoretical hydrocarbon liquid content is the amount of liquid theoretically condensable per unit volume of gas at base conditions. In the U.S., the term GPM (gallons of liquid hydrocarbon per thousand cubic feet of gas) is used.

therm

A unit of gross heating value equivalent to 100,000 Btu (1.055056 ž108J).

thermowell

A well in a process vessel or line which is used for a thermometer or thermocouple holder.

thermowell
A protective housing into a process vessel or a line which provides a protective barrier while allowing the measurement of the temperature of the product.

ton

A unit of mass.

ton
A U.S. customary unit of mass equivalent to two thousand pounds.

tonne

A unit of mass.

tonne
A Metric unit of mass equivalent to one thousand Kilograms.

tower

A vertical structure which can serve a variety of purposes and can leverage elevation.

tower
A vertical structure which can serve a variety of purposes and can leverage elevation.

tray
Separation devices used in processing plants.

tray spacing

The distance between trays in a trayed column.

tray spacing
The distance between separation devices in a column.

trayed column

A vessel wherein gas and liquid, or two miscible liquids, are contacted, usually countercurrently on trays.

trayed column
A vessel using separation devices, usually countercurrently, wherein gas and liquid are contacted.

treater

Differing system that are design to alter gases or liquids through a variety of approaches depending on the desired