A pipe or hole that allows gas to pass off.


Related Terms

SEA VALVE

A through hull valve, a shut off on a plumbing or drain pipe between the vessel's interior and the sea.

SOUNDING PIPE

A pipe leading to the bottom of an oil or water tank, for guiding a sounding tape or jointed rod when measuring the depth of liquid in the tank.
Sounding pipes in the engine room are normally fitted with deadweight cocks and screw caps. Caps and cocks should be closed at all times, except when sounding tanks.

POINT SOURCE

A municipal or industrial wastewater discharge through a discrete pipe or channel.

POHLE AIR LIFT PUMP

A pistonless pump in which compressed air fills the annular space surrounding the uptake pipe and is free to enter the rising column at all points of its pressure but sometimes welded or bonded.

PLUGGING

1. Braking an electric motor by reversing its connections, so it tends to turn in the opposite direction; the circuit is opened automatically when the motor stops, so the motor does not actually reverse. 2. The formation of a barrier (plug) of solid material in a process flow system, such as a pipe or reactor.

PIVOT ANCHOR

[DESENG] An anchor that permits a pipe to swivel around a fixed point.

PIPEWORK SEE PIPING. PIPE WRENCH

A tool designed to grip and turn a pipe or rod about its axis in one direction only. piping

PIPE TRAIN

In the extrusion of plastic pipe, the entire equipment assembly used to fabricate the pipe (such as the extruder, die, cooling bath, haul-off, and cutter).

PIPE TEE

A T-shaped pipe fitting with two outlets, one at 90 to the connection to the main line.

PIPE TAP

A small threaded hole or entry made into the wall of a pipe; used for sampling of pipe contents, or connection of control devices or pressure-drop-measurement devices.

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