دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a sample of a substance that is made up of equal portions of two or more spot samples obtained from a tank or pipeline. In a crude oil storage tank, one type of composite sample is taken at the top, at the bottom, and in the middle.

n: a mixture of individual samples from several compartments of a ship or barge, each of which contains the same grade of petroleum material. The mixture is blended in proportion to the volume of material in each compartment.

n: a blend of liquid samples taken from the upper, middle, and lower sections of a tank. For a tank of uniform cross section, such as an upright cylindrical tank, the blend consists of equal parts of the three samples. For a horizontal cylindrical tank, the blend consists of the three samples in the proportions shown in table 2, MPMS, ch. 8.1.