Explanation Absolute pressure is defined as the sum of gauge pressure and atmospheric pressure. Absolute pressure may be more than the atmospheric pressure or less than the absolute pressure. It depends upon the gauge pressure; if the gauge pressure is negative, then the absolute pressure is less than atmospheric pressure and vice versa. Diagram for the pressure is as follows: From the diagram, the formula is used for absolute pressure. P a b s 1 = P g a u g e + P a t m Where, the absolute pressure is P a b s 1 , gauge pressure is P g a u g e , and atmospheric pressure is P a t m . The formula for psig and psia is as follows: psig + 1atm = psia 14

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ISBN: 9781119840602

Author: MORAN

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Relation between 14.7 psig to 14.7 psia .

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