Background
Client request referred to a state-of-the-art LPG loading facility, with intention to replace metering systems based on turbine meters and include gaseous component into calculation.
Measurement requirements
Loading and unloading by weight scale is impossible to ensure an accurate batch. By direct NET flow measurement process is more accurate and less time consuming. The request was to design metering systems with class 0,3 for NET loading. In addition to this, main request was the usage of Coriolis mass flow meters. Since the LPG loading process means transfer between two vessels under pressure, it is mandatory to measure liquid phase filling the vessel and vapor phase coming out of the vessel to the tank.
Custom-made solution – Revamping the old facility
Project consists of the following installations:
Metrological consistency was achieved with control valves, permanently controlling differential pressure between liquid phase and LPG vapor pressure.
For flow meters, WIG applied OPTIMASS 7300 T40 CT and T50 CT for liquid, and OPTIMASS 8300k S25 for vapor. Single tube OPTIMASS 7300 CT version is approved for CT applications worldwide and in Serbia too, therefore we have quite a lot of experience with measuring light hydrocarbons. Vapor meter is OPTIMASS 8300k as a twin U shape tube designed for measuring low density and even low flow vapors.
Advantages
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