The Baker Hughes Panametrics DigitalFlow XGF868i from HMA Instrumentation is a low-cost, compact and explosion/flame-proof transmitter version of the GF868 flare gas flow meter. The XGF868i not only improves the efficiency of petrochemical plants, refineries and offshore platforms, but is used to conserve energy and reduce product loss by identifying sources of leaks into flare systems. It also improves compliance with pollution control regulations and reduces energy usage by accurately controlling the amount of steam fed to the flare tip.

Ultrasonic flow measurement, the ideal technology for flare gas applications, is independent of gas properties and does not interfere with the flow in any way. All-metal ultrasonic transducers installed in the pipe send sound pulses upstream and downstream through the gas. From the difference in the transmit times between the transducers, with and against the flow, the on-board computer of the Baker Hughes Panametrics DigitalFlow XGF868i from HMA Instrumentation uses advanced signal processing and correlation detection to calculate velocity and volumetric and mass flow rate.

Features include:

• CSA, ATEX and IEC Ex certifications
• Operates reliably even under unsteady flow, pulsating pressure, varying composition and temperature, harsh environments and the wide flow ranges typical of flare systems
• Measures velocity, volumetric and mass flow
• Delivers accurate flow rate, independent of gas composition
• Measures instantaneous average molecular weight
• Flow velocity is measurable from 0.03 m/s to 120 m/s in pipes or stack sizes up to 3 m in diameter
• Bidirectional velocity range: –100 m/s to 100 m/s
• Accurate low-flow rate measurement
• 4 000:1 turndown ratio
• One- or two-path configurations
• Allows cross-flow immunity in large pipes
• Minimal maintenance due to no moving parts, no holes or tubes and tolerance to dirty or wet conditions
• No pressure drop
• Field-proven installation techniques
• Easy serviceability