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ASHRAE STD 41.8 1989 Edition, June 29, 1989
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Standard Methods of Measurement of Flow of Liquids in Pipes Using Orifice Flowmeters
Includes all amendments and changes through Change/Amendment , June 29, 1989
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This Standard shall apply to fluids that exist in the liquid physical state and whose thermodynamic properties are such that the fluid will remain in a complete liquid state prior to, during, and following its path through the flow-measuring instrument.