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It is 0.000039 inches, approx.
vacuum is measured in inches of mercury. sea level is zero. water will boil at 212F. as negative pressure or elevation increases the boiling temp. of water decreases. if you had a pressure reading of 29.7 in" of mercury the water will boil at 192F. if you had a pressure reading of 10 in" of mercury water will boil at 32F
The density of mercury is 13.534, compared to '1' for water. So the water columnis 13.534 times as high as the mercury column at the same pressure.(30 inches of water) x (25.4 millimeters/inch) / 13.534 = 56.3 millimeters of mercury
14 inches equals one pound of natural gas pressure
Low pressure - 6 to 7 inches water column, equivalent to 4 ounces or 1/4 PSI, is the standard pressure supplied by natural gas utilities in the USA and Canada. Check with your local utility if you need to increase the pressure for your use. Most natural gas appliances manufactured for use in the US are designed to operate up to a maximum of 14 inches water column.
0.5 psig = 420.62 inches of water column.
0.25 psig = 413.7 inches of water column
10 inches of water column equals to how much gas pressure?
There's no such thing as "mercury vacuum". A volume of space can have solid mercury, liquid mercury, or mercury vapor in it, or it can be a vacuum. The weight of the "standard atmosphere" on any area is the same as the weight of a column of mercury 29.92 inches high on that same area, with no air above the mercury.
27.71 inches of water column equals 1 psi
It is 0.000039 inches, approx.
Multiply inches of WC by 0.0361 to obtain PSI.
1 psig is equivalent to 51.71 mm (2 in) of mercury or to approx 700 mm (27.5 in) of water. Technically one cannot have apsig. Psig represents a pressure reading of the pressure above normal atmospheric pressure of 14.7 psi. You mean a psi.
10" Water Column equals about .4 Pounds per Square Inch or 0.36127291827412783psi exactly.
Multiply by 0.036 http://www.enercongroup.com/conversion_factors.htm One PSI is equal to 27.7 inches of water column
8.75 iwc
.4 psi