reduced pressure


Also found in: Acronyms, Wikipedia.

reduced pressure

[ri′düst ′presh·ər]
(meteorology)
The calculated value of atmospheric pressure at mean sea level or some other specified level, as derived (reduced) from station pressure or actual pressure; thus, sea level pressure is nearly always a reduced pressure.
(thermodynamics)
The ratio of the pressure of a substance to its critical pressure.
References in periodicals archive ?
Metalcasting facilities can use reduced pressure testing to hold density, which is a reflection of gas content and metal quality, within a certain range, Groteke said.
There are several possible causes for the problems you have identified, and they deal with your sampling processes, the way you are performing the reduced pressure test (RPT) and variations in the samples themselves.
In New York's lackluster real estate market where there is little new construction activity, consulting engineering firms are finding various opportunities in the area of rehabs and renovations One hot spot in the market concerns the installation of backflow prevention devices or RPZ (reduced pressure zone backflow prevention devices) which are now required by the city s Department of Environmental Protection (DEP).
N,N'-dimethylacetamide (DMAc) was distilled under a reduced pressure (60 [degrees] C/11 mm Hg).
1 shows how filtration--following a degassing--can provide a boost in specific gravity results as measured with a reduced pressure test.
According to this theory, the drop in ocean heights reduced pressure on the seabed and destabilized buried deposits of methane hydrates--icelike molecules that contain solid water and methane gas.
The reduced pressure testing of aluminum melts for evaluating hydrogen levels in the molten alloy has been performed using the same basic method for more than 50 years.
A simple but effective testing method that has been used for years is the reduced pressure test (RPT).
Q We use the reduced pressure test (RPT) to measure gas porosity in our aluminum melt.
If the amine container experiences a leakage or reduced pressure prob1em, the safety system takes over, handling the problem and preventing any dangerous (and potentially flammable) spills from occurring.
One other measure is available to foundry personnel on the shop floor-- the Reduced Pressure Test (RPT) (Fig.
Foundries depend on the Reduced Pressure Test (RPT) to assess gas and inclusion levels in molten aluminum alloys.

Full browser ?