Oil and Gas: Terms & Glossary (7)

P&ID	Piping and instrumentation diagram.
Pedestal	See foundation.
Pipe guide	See guide.
Pipe hanger	See hanger.
Pipe rack	Structural framework consisting of a series of vertical columns connected with horizontal members, Major thoroughfare for pipes traveling in a process facility.
Pipe support	Structural member that carries the weight of a piping configuration.
Piping	Generic term used to describe pipes, fittings, flanges, and valves in a facility.
Piping Drawing Index	Created from the plot plan, the index uses match lines to divide the piping facility into small drawing areas. These areas are assigned drawing numbers and distributed to drafters/designers for creation.
Plan End	Any piping component having square ends used for socket-weld connections.
Platform	An elevated walkway around a vessel or other piping equipment.
Plot Plan	A master drawing showing the locations of all buildings, structures, and equipment in a piping facility.
Plug	Screwed fitting having external threads that terminates a piping configuration.
Plug valve	A particular valve having a rectangular shaped hole through a tapered plug. Uses one-quarter turn of a handle to align the hole with the valve port.
Pressure alarm	Instrument designed to signal dramatic changes in internal pressure.
Pressure controller	A control valve that regulates internal pressure of a pipe or vessel after receiving a signal from a transmitter.
Pressure differential recording controller	Controls the pressure differential between two pipes or vessels by means of a control valve.
Pressure indicator	Dial instrument that indicates internal pressure of a pipe or vessel.
Pressure indicating controller	Control valve with an indicating transmitter that controls internal pressure on a pipe or vessel.
Pressure recorder	A recording instrument that makes a permanent record of internal pressures within a pipe or vessel.
Pressure recording controller	Instrument similar to a pressure recorder and having the capability to transmit a signal to a control valve.
Pressure safety valve	An automatic pressure-relieving device actuated by excessive internal pressure of a pipe or vessel.
Process equipment	Piping equipment having the capability to alter the chemical makeup of the commodity it contains.
Pump	Mechanical device used to move fluids under pressure from one location to another.
Purge	The act of removing foreign matter from the internal surfaces of a pipe or vessel.

Introduction to the Global Oil & Gas Business