دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: in tank sampling, a sample that is obtained by submerging a stoppered beaker or bottle to a poinias near as possible to the draw-off level, then opening the sampler and raising it at a rate that makes it about three-quarters full (maxi- mum 85%) as it emerges from the liquid.

n: a system for automatically measuring and sampling oil or products at points of receipt or delivery. See lease automatic custody transfer.

n: a device that, when installed in a pipe or flow channel and actuated by automatic control equipment. enables a representative sample to be obtained of the fluid flowing therein. systematic basis, which can be tested to determine the quality of the liquid flowing in the line. An automatic sampling device consists of a probe inserted into the line, an extractor, a timer or other device that controls the sampling rate, and a small tank (sample receiver) that holds the samples.

n: in tank sampling, a sample that consists of proportionate parts from several sections of the tank.

system 11: a type of tap sampling system found on liquid storage tanks. The permanently installed taps on the out- side of the tank are attached to pipes and a floating boom inside the tank that rises and falls with the liquid level.

n: in tank sampling, a sample obtained from the material near the bottom surface of the tank, container, or line at a low point.

n: the process of tracking down the source of an illegal waste discharge through sampling the waste and possible sources to determine which source matches the discharge best. Fingerprinting is expensive, but in large damage cases, it can help prove or disprove whether a substance was discharged from a particular source.

n: in tank sampling, a spot sample taken 4 inches (100 millimetres) below the level of the tank outlet.

n: in tank sampling, a blend of spot samples mixed in equal proportions for testing.

n: see automatic sampling.