viscosity-gravity constant


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viscosity-gravity constant

[vi′skäs·əd·ē ′grav·əd·ē ‚kän·stənt]
(chemical engineering)
An index of the chemical composition of crude oil; defined as the general relation between specific gravity and Saybolt Universal viscosity; the constant is low for paraffinic crude oils, high for naphthenic crude oils. Abbreviated VGC.
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