Coriolis mass flowmeter used in oil custody transfer

Coriolis mass flowmeter used in oil custody transfer

The material balance in the production process of the petrochemical industry, the economic accounting in the production management, and the measurement in the oil custody transfer process are mostly based on the quality unit.
The volume flow of fluid is measured by means of differential pressure, volumetric, velocity flow meters and methods of detecting capacity, such as manual gauges of oil tanks.
With the change of working conditions, some fluid characteristic parameters such as temperature, pressure, viscosity, density and other factors will change.

In occasions with large changes in operating conditions, the above measurement methods often fail to achieve the purpose of accurately measuring fluid mass flow.
Therefore, the development and use of direct mass flow meters are of great significance for oil custody transfer measurement and process control.

The Coriolis mass flowmeter has the characteristics of high accuracy and stability, direct mass flow measurement, etc., which avoids the traditional volume flow measurement method from being affected by temperature, pressure, viscosity, density and other factors, and it is difficult to truly reach the target. The nominal measurement accuracy has changed the traditional high-accuracy flow meter relying on mechanical rotation and transmission to realize the flow transmission method.

Therefore, the mass flowmeter has been installed at the five terminals of the client company for product oil shipment, product oil rail tank truck loading, product oil tank truck loading at the oil station, gas workshop LPG truck tank truck loading, and LPG delivery respectively. The internal material transmission measurement and accounting of custody transfer metering devices such as synthetic branch plants and natural gas company pipeline transportation have been widely and successfully applied.

Coriolis mass flow meter application case in oil custody transfer measurement

1) The application of large-caliber mass flow meters in the custody transfer measurement of refined oil shipments at the docks

At present, the 4 terminal mass flowmeters of the port company are respectively used in the custody transfer metering flow of more than a dozen products such as diesel, gasoline, naphtha, aviation kerosene, styrene, toluene, xylene, liquefied gas, lubricating oil, sulfur, etc. measuring system.
In the terminal loading measurement system, the mass flow meter operation application includes single measurement, two parallel measurement, and three parallel measurement.

2) Application in custody transfer measurement of finished oil loading on railway tank cars

The application of mass flowmeter in the automatic loading flow measurement system of railway tank car naphtha in the locomotive workshop,
Mass flow meters are respectively used in the measurement systems for the loading flow of railway tank car diesel, aviation kerosene, benzene, toluene, xylene and other products.

3) Application in the custody transfer measurement of the finished oil loading of the automobile tanker.

Mass flow meters are respectively used in the custody transfer measurement system for the loading of diesel and gasoline in tank trucks at the gas station and the flow measurement system for loading of liquefied gas and propylene in gas workshops.

In addition, in the spherical tank area of ​​the gas workshop, mass flow meters are also used in the custody transfer measurement of the liquefied gas and propylene pipelines to the city gas company and the synthesis branch.
The billing rate is all based on the measurement data of the mass flow meter.

Advantages of Coriolis mass flow meter in the custody transfer of oil products

1) The mass flow meter directly measures the mass flow of the medium. Once it is put into use, the measurement result is objective. Therefore, mass flow meters are the ideal choice for oil custody transfer measurement.

2) The use of mass flow meters for custody transfer measurement of oil products greatly improves the work efficiency of shipping and loading.

3) The use of mass flow meters for custody transfer measurement of oil products significantly reduces measurement disputes.
The mass flow meter has stable operation and high accuracy (up to 0.1%), which is recognized by customers.
At present, the billing rate of mass flowmeters for oil products at the terminal is 98.33%, and the billing rate for mass flowmeters for oil products is 99.99%.

4) It is necessary for the company to use the various data (such as temperature, density, instantaneous mass and volume flow, cumulative mass and volume flow. Zero position, etc.) of the mass flowmeter for product oil rail tank car loading and automobile tank car loading. The form of digital communication is introduced into the DCS system for recording, and then transmitted to the company’s major offices through the company’s local area network, such as the measurement center, production office, sales company, etc., so that these departments can understand and master the oil product installation in the first time. The situation of ships and trucks facilitates the analysis, judgment and processing of historical data afterwards, and also ensures that our company’s oil product custody transfer measurement management tends to be more perfect.