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A pipeline that crosses over a mechanism or space providing flow from a source to a destination.



Related Terms

JACKETED PIPE

A double-walled pipe in which liquids that are too viscous for pipeline transport at normal temperatures flow through the inner pipe that is surrounded by a pipe circulating hot fluids.

AREA METER

A mechanism to measure fluid flow rate through a fixed-area conduit by the movement of a weighted piston or float supported by the flowing fluid; includes rotameters and piston-type meters.

MULTICHANNEL FIELD-EFFECT TRANSISTOR

A field-effect transistor in which appropriate voltages are applied to the gate to control the space within the current flow channels.

COOLING LOAD

The total amount of heat energy that must be removed from a system by a cooling mechanism in a unit time, equal to the rate at which heat is generated by people, machinery, and processes, plus the net flow of heat into the system not associated with the cooling machinery.

PRESSURE SURGE

A sudden increase in the pressure of the liquid in a pipeline brought about by an abrupt change in the flow velocity.

SURGE PRESSURE

A phenomenon generated in a pipeline system when there is a change in the rate of flow of liquid from the line. Surge pressures can be dangerously high if the change of flow rate is too rapid and the resultant shock waves can damage pumping equipment and cause rupture of pipelines and associated equipment.

HYDRAULIC RAM

A device for forcing running water to a higher level by using the kinetic energy of flow; the flow of water in the supply pipeline is periodically stopped so that a small portion of water is lifted by the velocity head of a larger portion. Also known as hydraulic pump.

ANEROID FLOWMETER

A mechanism to measure fluid flow rate by pressure of the fluid against a bellows counterbalanced by a calibrated spring.

DORR CLASSIFIER

A horizontal flow classifier consisting of a rectangular tank with a sloping bottom, a rake mechanism for moving sands uphill along the bottom, an inlet for feed, and outlets for sand and slime.

GAS VALVE

Device in a pipeline for starting, stopping or regulating flow of gas.

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