دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

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: a device that controls product flow and directs it to the proper location. Mainline valves and side taps are examples of flow-control connections.

n: a device fitted on the vertical support members of the Trans-Alaska Pipeline System (TAPS) to circulate a refrigerant continuously between the subsoil and the top of the pipe. The refrigerant keeps the ground beneath the pipeline frozen to prevent frost heaving.

n: on a flanged fining, the threaded holes on either side of the orifice plate. Small pipes are screwed into the taps to connect die fining to a flow recorder. Taps are used so pressure differential on either side of the plate can be measured and recorded. See orifice meter.

n: in an orifice meter installation, the threaded hole into which is screwed a small pipe to connect the orifice fitting to the flow recorder. Two taps are usually employed: the upstream tap centre is located two and one-half times the published inside pipe diameter upstream of the nearest plate face;the downstream tap centre is located eight times the published inside pipe diameter downstream of the nearest plate face. See orifice-flange tap, orifice meter.

n: in an orifice fitting, the threaded holes on each side of the orifice plate. Small pipes are screwed into the holes to connect the fitting with a flow recorder. The taps are used so that pressure differential on either side of an orifice plate can be recorded. See orifice meter.

n: that part of an orifice meter installation that creates the pressure drop in the pipeline necessary for gas measurement;includes the meter tube, orifice plate, fitting, and the pressure taps.

n: in tank sampling, withdrawing liquid samples through sample taps, at least three of which should be placed equidistant throughout the tank height and extending at least 3 feet (1 metre) inside the tank shell. A standard V4- inch (O.64-centimetre) pipe with suitable valve is satisfactory.

abbr: Trans-Alaska Pipeline System.

trans Alaska pipeline system.

n: (TAPS) the largest long-distance, big-inch pipe- line in the non-Communist world. Stretch- ing approximately 800 miles (1,288 kiIometres) from Deadhorse (near Prudhoe Bay) to Valdez, Alaska, the 48-inch pipeline was completed in 1977 at a cost of $8 billion. Today, it transports from 1 million to 2 million barrels (159 million to 318 million litres) of oil a day from fields on the North Slope of Alaska to tank farms in Valdez.