Uniform Corrosion

CorrosionThe destruction of a material or its properties because of a reaction with its (environment) surroundings. that results in an equal amount of material loss over an entire pipe surface.

Upset

The inadvertent action of a boring machine that rotates the machine and track from its normal and upright position to another position.

Upsizing

Process of creating a larger diameter MTBM than a machine with the original factory configuration. Also, any method that increases the cross-sectional area of an existing pipeline, replacing it with a larger cross-sectional area pipe.

Utility Corridor

Duct in which two or more different utility services are installed with access for maintenance. Commonly referred to as a Utilidor in North America.

Utility Monitoring Point (UMP)

An instrument designed to measure movement of an individual utility when exposed to construction activities.