FIELD: machine building.
SUBSTANCE: movement method consists in formation of coaxial concentric layer at inner surface of the tube. Methyl alcohol in quantity of (17.4÷53) wt % is added to water so that alcoholic solution the density of which is equal to density of pumped oil or oil product is formed.
EFFECT: creation of stable annular layer of low-viscosity fluid owing to neutralisation of gravity force and Archimedes force, which appear at difference of densities of oil or oil product and low-viscosity fluid flowing in coaxial concentric layer at inner surface of the tube.
1 dwg, 1 tbl
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