Pound-force

Unless otherwise noted. To convert N to pound-force, divide by 4.448. 

Pounds force per square foot Newtons per square meter 47.88... 

To convert milhmeters of mercury to pounds-force per square inch, multiply by 0.01934. 

To convert bars to pounds-force per cubic inch, multiply by 14.504. To convert bars to Idlopascals, multiply by 1 X 10". 

L, viscosity to convert pascal-seconds to pound-force-seconds per square foot, multiply by 0.020885 to convert pascal-seconds to Cp, multiply by 1000. 

Extracted from Steel Pipe Flanges and Flanged Fittings, ANSI B16.5— 1977, with permission of the publisher, the American Society of Mechanical Engineers, New York. Test temperature not to exceed 125 F. ( F — 32) 9 = G to convert pounds-force per square inch to megapascals, multiply by 0.006895. 

NOTE To convert degrees Celsius to degrees Fahrenheit, = ( F — 32)/1.8. To convert Idlopascals to pounds-force per square inch, multiply hy 0.145. Kojima, Kate, Sunaga, and Hashimoto, Kagaku Kogaku, 32, 337 (1968). 

A hardness classification of stone based on the compressive strength of 1-in cubes is as follows, for loadings in pounds-force per square inch veiy soft, 10,000 soft, 15,000 medium, 20,000 hard, 25,000 very hai d, 30,000. 

NOTE To convert horsepower to watts, multiply ky 746 to convert pound-force-feet to newton-meters, multiply ky 1..356 and to convert revolutions per minute to radians per second, multiply ky 0.1047. 

FIG. 29-58 Head-horsepower-capacity characteristics of a lean pump tandem-connected with a power-recovery turbine operating as the sole driver. To convert gallons per minute to cubic meters per minute, multiply by 3.79 X 10 to convert horsepower to kilowatts, multiply by 0.746 and to convert pounds-force per square inch to megapascals, multiply by 6.89 X 10 . ... 

Pressures are quoted in pounds force per square inch (psi) and also in bars. As it is not usual to refer to bar gauge, I have, for example, referred to a gauge pressure of 90 psi (6 bar), rather than a pressure of 90 psig. ... 

A number of units are used to express a pressure measurement. Some are based on a force per unit area for e.xample, pound (force) per square inch (psi) or dyne per square centimeter (dyne/enr). Otliers are based on a fluid height, such as inches of water (in H O) or millimeters of mercury (iimiHg) units such as these are convenient when tlie pressure is indicated by a difference between two levels of a liquid, as in a imuiometer or barometer. Barometric pressure is a measure of the ambient air pressure. Standard barometric pressure is 1 atm and is equivalent to 14.696 psi and 29.921 in Hg. 

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