Around 90 million barrels of crude oil and liquefied natural gas (LNG) are produced around the world every day. This corresponds to 14.4 billion liters that are transported, temporarily stored, distributed, cracked and refined, shipped and finally used as an energy supply or as a raw material in manufacturing. The quantities are measured at every transfer point, a process that should be as precise as possible: given the immense volumes, the slightest deviations quickly add up. The highest possible accuracy is therefore desirable, especially for custody transfer applications.
Verifying custody measurement systems against an on-site reference is a common practice in the oil & gas industry in order to comply with national custody transfer regulations and international standards such as OIML R117 or API. This can be done with a master measurement device, a prover or a truck scale, for instance. This process can be exceptionally complex, time-consuming and costly, depending on the design of the facility and the assembly situation. The level of complexity increases substantially if any measurement deviations exceed the tolerance limit.
“Factory calibration results in considerable cost savings in comparison to on-site calibration and, in addition, to the best possible measuring performance.”Jörg Zacheres, Product Manager at Endress+Hauser
Endress+Hauser is therefore now offering its customers state-of-the-art ex-works hydrocarbon flow calibration as a new service. The Coriolis mass flowmeters are calibrated in accordance with ISO/IEC 17025 at the accredited and traceable calibration facility in Reinach, Switzerland, with media of various viscosity under various flows. The adjustment factors for the measuring system’s flow computer in the customer’s plant are thereby determined. The calibration provides the data for the Reynolds number correction, which increases the measuring precision to the best possible technical level when it comes to complex media such as crude and heavy oils.
“Factory calibration results in considerable cost savings in comparison to on-site calibration and, in addition, to the best possible measuring performance,” says Jörg Zacheres, the Product Manager in charge at Endress+Hauser. “By offering our customers this additional quality milestone they are able to significantly reduce their project risk.”