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A diving guide that lists ascent rates and breathing mixtures to provide safe pressure reduction to atmospheric the shaft. Also known as vertical turbine pump.



Related Terms

FLUE GAS EXPANDER

In a petroleum processing system, a turbine for recovering energy at the point where combustion gases are discharged under pressure to the atmosphere; the reduction in pressure drives the turbine impeller.

FLEMING CRACKING PROCESS

An obsolete liquid-phase thermal cracking process for heavy petroleum fractions; the charge was heated under pressure in a vertical shell still.

FAHRENHEIT TEMPERATURE

Temperature based on a scale in which, under standard atmospheric pressure

OBSCURING PHENOMENON

Any atmospheric phenomenon, not including clouds, which restricts the vertical or slant visibility.

CONSTANT-PRESSURE SURFACE

In meteorology, an imaginary surface along which the atmospheric pressure is everywhere equal at a given instant. Also called ISOBARIC SURFACE.

STANDARD ATMOSPHERE

  1. A unit accepted temporarily for use with the International System of Units; 1 standard atmosphere is equal to 101,325 pascals. 2. A hypothetical vertical distribution of atmospheric temperature, pressure, and density which is taken to be representative of the atmosphere for various purposes.

PRESSURE GAGE

Pressure differential above or below atmospheric pressure.

PRESSURE GRADIENT

A measure of the rate of change in atmospheric pressure with distance. The closer the isobars are together, the higher the pressure gradient is and the stronger the winds will be.

CELLULAR VESSEL

ship constructed for transportation of containers stacked on top of each other in vertical guide shafts, no general freight is carried.

CSA B-51 CODE

Canadian Standards Association Code for the Construction and Inspection of Boilers and Pressure Vessels. Its purpose is to provide for the safe design, construction, installation, operation, inspection, testing and repair of boilers, pressure vessels, and related equipment; and second, to promote uniform requirements among the Canadian jurisdictions.

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