Grade

The elevations shown on plans and/or survey grade stakes for the installation of the carrier pipe. It is occasionally to give elevations for casing. In most cases, it is given to the flow line but can also be given to the top of the pipe or casing.

Gradient

See Grade.

Grain

A portion of a solid metal (usually a fraction of an inch in size) in which the atoms are arranged in an orderly pattern. The irregular junction of two adjacent grains is known as a grain boundary; also a unit of weight, 1/7000th of a pound; also used in connection with soil particles i.e. = grain of sand.

Granular

Technical term referring to the uniform size on grains of crystals in rock.