Daniel 3818 liquid ultrasonic flow meter for LNG

The Daniel 3818 is a liquid ultrasonic flow meter for liquefied natural gas applications. Specifically designed for reducing flow measurement uncertainty throughout the LNG value chain, this meter is suitable for many marine and offshore applications, including custody transfer, fiscal metering, line balancing, check metering, allocation measurement and tanker loading and unloading.

With a completely redundant 4-path, multiplane configuration that is the equivalent of two 4-path meters in a single body, the Daniel 3818 ultrasonic meter utilises two independent transmitters - one for each set of four chordal paths. This ensures complete measurement redundancy and the ability to poll each 4-path meter separately. Acoustic processing is performed by specialised electronics designed to achieve high sampling rates, provide stable ultrasonic signals and optimal low flow response, delivering accurate, stable and reliable measurement. The 3818 provides a linearity within ±0.15% and a meter factor uncertainty of ±0.027%.

Each Daniel 3818 ultrasonic meter is calibrated at Daniel’s ISO/IEC 17025 certified flow calibration facility using a static zero flow test on liquid nitrogen and a full dynamic test on water. The 3818 is designed to withstand product temperatures ranging from -196 to +60°C, making it suitable for a wide variety of cryogenic LNG applications.

The 3818 meters are full-bore meters with no internal moving parts to wear or drift, providing for low pressure drop and minimising the risk of LNG flashing. Also available in large sizes, ultrasonic meters are suitable for high-volume LNG transfers, which equates to faster tanker loading and offloading.