Ounces per square inch

For tank work, inches water column (in. wc) or ounces per square inch (osi) are commonly used to express the value of pressure or vacuum in the vapor space of a tank. These pressures are usually very low relative to atmospheric pressure. The common measures of pressure are compared as follows ... 

American combustion equipment is frequently used. This tends to use Imperial units as well as degrees Fahrenheit and ounces per square inch pressure. 

Table 9.—Conversion Tables for Air Pressures Pressures in Inches op Water Corresponding to Ounces per Square Inch...

Pressure in Ounces per Square Inch Corresponding to Inches of Water... 

Pressure is generally expressed in inches of water or in ounces per square inch. 1 oz. per square inch = 1.732 in. of water H = 5.2hlW P = HW, and P = 5.2/i. For air at density W = 0.075, a head of 1 in. of water equals that of 69.3 ft. of air. Three pressures must be considered in a column of moving air, namely, static, velocity and impact. The first represents the compression, the second kinetic energy of the blast, and the third the total pressure or the sum of the static and velocity pressures. The static pressure in a system through which air passes is often referred to as maintained resistance. ... 

Ounce per square inch dynes per square centimeter 4,309... 

The Problem What if the cost of the material on the sides of a 12-ounce container is 1 c per square inch and the cost of the material on the top and bottom is 2[Pg.301]

Commercial blood-albumin spreader was used as the emulsifying agent at the rate of 4 ounces per 100 gallons of finished spray mixture (24) The emulsion was applied to the fruit by means of a commercially available air-pressure paint spray gun (Type MBC, made by the De Vilbiss Co., Toledo, Ohio). The paint spray gun was operated with compressed air at a pressure of 30 pounds per square inch. The fruit were placed singly on a small turntable, so that the center of the fruit was at the same height as the face of the nozzle of the spray gun and 30 inches in front of it. The turntable was set at 30 r.p.m. Each fruit received a uniform exposure of four revolutions to the spray stream in accord with the following routine ... 

Notes at, atmosphere (technical) atm, atmosphere (physical) Btu (Btu or BTU), British thermal unit cal, calorie cc, cubic centimeter chu, centigrades heat unit 1 circular mil, area of circle with diameter of 1 mil dyn, dyne eV, electronvolt /, force //, fluid ft, foot or feet h, hour Hg, mercury in, inch J, joule h, hour hp, horsepower L (L or 1), hter (litre) lb (from Latin libra), pound orlbni (Ibm), pound of mass Ibf (Ibf), pound of force m, meter (metre) mi, mile mil, unit of length equal to one thousandth of an inch min, minute pm, micrometer N, newton nmi, nautical mile oz, ounce P, poise Pa, pascal pcu, pound centigrade unit pdl, poundal psi, pounds per square inch psia, psi absolute psig, psi gauge s, second St, stoke UK, United Kingdom (ie, British unit) US, United States (ie, US unit) yd, yard W, watt. 

It is to be supposed, however, that a greater or less proportion of silver is contained in all the above, although it is not taken into account in the analyses. The concentration of the alloy is not carried on beyond three hundred ounces per ton at the works above-mentioned. When the silver has accumulated to Hub proportion, the rich lead is cast into bars about two inches square, and is known by the term lead riches. 

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