Abstract
Abstract Characteristics of crude-oil flow in large-diameter lines have been investigated by gathering data on lines under normal operating conditions. A description of these tests, and a summary of the results obtained are discussed in this paper. From these tests, an exponential equation has been derived to determine capacity or pressure drop for all trunk lines pumping crude oil in the turbulent-flow region. In connection with these flow tests, an investigation was made into the effect of pressure on viscosity in the range of normal pipe-line operating pressures. This effect, which in the past has been assumed to be a negligible one, is shown to be of definite importance.
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