دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the adjustment or standardising of a measuring instrument or of a standard capacity measure, a tank prover, or a pipe prover. Log calibration is based on the use of a permanent calibration facility of the American Petroleum Institute at the University of Houston to establish standard units for nuclear logs.

comparison to a standard and adjustment to fit.

n: see shut-in pressure. closed stationary tank prover n: see positivevolume prove1:

n: the amount of time it takes for the liquid clinging to the sides of a tank prover to fall and drip out of the vessel.

n: a type of open tank prover that has a gauge glass on the neck of the prover but not on the bottom of the prover. Compare wet-bottom prover.

n: the section of reduced cross-sectional area at the top and/or rottom of an open tank prover. It has visible graduations to enable measuring small volumes.

n: a device used to determine the accuracy of a meter. Two popular types are pipe provers and open tank provers. A pipe prover has a calibrated pipe that contains a known volume. A sphere displaces oil or liquid product through the pipe while the meter being proved registers the amount of oil or liquid displaced. The meters reading is then compared to the known volume in the pipe. An open tank prover is a calibrated tank that contains a known volume. Oil or liquid product is put into the tank while the meter being proved registers the amount. The meters reading is then compared to the known volume in the tank.

n: a relatively small calibrated tank, open to the atmosphere. Often used to prove meters at loading racks. In use, the meter to be proved is set at zero and the prover tank is filled to a calibrated height while the meter registers the amount of liquid flowing d1rough it. When the tank is filled, the calibrated volume in it is compared to the volume the meter registered. If the meter is inaccurate, it is adjusted or a factor is used to compensate for the inaccuracy.

n: a relatively small tank with an accurately calibrated volume used to prove a meter. Liquid is flowed from the meter and into the tank until the calibrated level is achieved. The volume of liquid in the tank is then compared with the volume the meter recorded. If required. the meter is adjusted or a special factor is used to correct the meter. Also called a closed stationary tank prover.

n: an open or closed vessel of known capacity designed for the accurate determination of the volume of liquid delivered into or out of it during a meterproving operation.

n: an open tank prover with a gauge glass on the bottom of the prover. Compare dry-bottom prover.