LENGTH BPP

The length of a vessel along the waterline from the forward surface of the stem, or main bow perpendicular member, to the after surface of the sternpost, or main stern perpendicular member. Believed to give a reasonable idea of the vessel's carrying capacity, as it excludes the small, often unusable volume contained in her overhanging ends.

length_bpp vessel bow stern surface volume waterline length forward perpendicular

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SHALLOW WATER EFFECT

The effect that due to the depth of water, the speed of the vessel and shape of the vessel's hull causes the vessel to sink deeper in the water especially in shallow water and at high speed. The vessel becomes sluggish in responding to the rudder.

water shallow_water_effect hull shallow depth high shape sink vessel shallow_water speed

PNEUMATIC TEST

Pressure testing of a process vessel by the use of air pressure.

pneumatic_test process pressure air vessel

PIEZOMETER

1. An instrument for measuring fluid pressure, such as a gage attached to a pipe containing a gas or liquid. 2. An instrument for measuring the compressibility of materials, such as a vessel that determines the change in volume of a substance in response to hydrostatic pressure.

piezometer pipe volume substance compressibility vessel gas fluid instrument gage

PERFORATED-PLATE EXTRACTOR

A liquid-liquid extraction vessel in which perforated plates are used to bring about contact between the two or more liquid phases.

perforated-plate_extractor contact vessel two liquid liquid-liquid_extraction

PACHUCA TANK

Air-agitated, solidliquid mixing vessel in which the air is injected into the bottom of a center draft tube; air and solids rise through the tube, with solids exiting the top of the tube and falling through the bulk of the liquid.

pachuca_tank bottom tube air center vessel bulk top draft mixing rise solids

NORMAL OPERATION

[MECHENG] The operation of a boiler or pressure vessel at or below the conditions of coincident pressure and temperature for which the vessel has been designed.

normal_operation boiler operation pressure vessel conditions pressure_vessel temperature

MOVING-BED CATALYTIC CRACKING

[CHEMENG] Petroleum refining process for cracking (breaking) of long hydrocarbon molecules by use of heat, pressure, and a granular cracking catalyst that is continuously cycled between the reactor vessel and the catalyst regenerator.

moving-bed_catalytic_cracking process catalyst refining petroleum hydrocarbon vessel cracking

MOVINGBED

[CHEMENG] Granulatedsolidsina process vessel that are circulated (moved) either mechanically or by gravity flow; used in catalytic and absorption processes.

movingbed process gravity vessel absorption

LONGITUDINAL BAFFLE

Baffle sheets or plates within a process vessel (such as a heat exchanger) that are parallel to the long dimension of the vessel; used to direct fluid flow in the desired flow pattern.

longitudinal_baffle dimension process parallel heat baffle fluid_flow vessel flow fluid

LAUNCHING CRADLE

A framework made of wood to support a vessel during launching from sliding ways.

launching_cradle launching support sliding framework vessel wood

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