Precipitation

Process by which water in liquid or solid state (rain, sleet, snow) is discharged out of the atmosphere upon a land or water surface.

Preconditioning Work

That part of a project, usually before renovation work, which includes preparatory cleaning and internal inspection.

Preparatory Cleaning

Internal cleaning of pipelines, particularly sewers, prior to inspection, usually with water jetting and removal of material where appropriate.

Pressure

Changes the drilling fluid pressure.

Pressure Rating

Estimated maximum internal pressure that allows a high degree of certainty that failure of the pipe will not occur.