『Ultrasonic Gas Flow Meters: High-Accuracy Gas Pipeline Custody Transfer Monitors』Related information(flow rotameter|digital flow meter|balo meter|hydraulic flow meter|volumetric meter|positive displacement meter|pitot tube flow meter|displacement meter|cfm meter|variable area flow meter|inline flow meter|differential pressure flow meter|calibrated flow meter|velocity meter|paddle wheel flow meter|oval gear flow meter|anemometer hvac|multiphase flow meter|doppler flow meter|thorpe tube flowmeter|heat flow meter)
Ultrasonic Gas Flow Meters: High-Accuracy Gas Pipeline Custody Transfer Monitors
Quick Answer: Ultrasonic gas flow meters measure natural gas, compressed air, and process gas flow without moving parts. For gas pipeline custody transfer, multipath transit time meters deliver repeatability from ±0.1% to ±0.2% of reading and accuracy within ±0.5% of reading. Silver Instruments supplies inline ultrasonic gas meters for DN50 to DN300 lines. Send us your pipe size (DN), pressure (bar), temperature (°C), gas composition, and flow range before asking for a price.
Why Ultrasonic Meters Fit Gas Pipeline Custody Transfer
Custody transfer means money changes hands based on flow data. A small error in a mechanical meter can cause billing disputes and audit problems. Ultrasonic gas flow meters use the transit time method. The meter sends acoustic signals upstream and downstream. The gas flow speeds up the signal travelling with the flow and slows down the signal travelling against the flow. The meter calculates gas velocity from the time difference.
Most gas pipeline operators choose multipath ultrasonic meters because a single path can miss swirl or irregular velocity shape. Four path and six path meters sample velocity at different chord positions across the pipe. That gives a stable average velocity profile. In practice, a gas distributor in Thailand reduced billing corrections after switching a DN200 natural gas line from a turbine meter to a multipath ultrasonic unit. The meter paid for itself within one billing cycle.
Accuracy, Repeatability, and Pressure Limits
For custody transfer, repeatability matters more than accuracy on the data sheet. A meter with ±0.5% of reading accuracy but poor repeatability can still create daily drift. Ultrasonic gas flow meters with four or six paths typically hold repeatability from ±0.1% to ±0.2% of reading across a flow velocity range of 0.5 to 30 m/s.
Customers often ask about pressure and temperature limits. Standard inline ultrasonic gas meters from Silver Instruments cover gas pressures up to 40 bar and process temperatures from -20 °C to 60 °C. For natural gas pipelines at 60 bar or 100 bar, we confirm flange rating, transducer material, and body design before quoting. Send pressure (bar) and temperature (°C) in the first inquiry.
Installation Factors Most Engineers Skip
Ultrasonic gas meters are sensitive to flow profile. Do not install the meter immediately after a control valve, elbow, or compressor. Straight run requirements vary by meter path count. A common starting point is 10D upstream and 5D downstream for a four path meter. Longer straight runs improve repeatability and reduce calibration drift.
Here is the thing. If space is limited, a flow conditioner can help, but it adds pressure drop. We ask for piping layout because a poor installation can turn a good meter into an unreliable one. Most engineers skip this part until the meter fails a site verification test.
Dry gas is another factor. Ultrasonic signal strength drops when liquids or heavy sludge coat the transducers. Natural gas pipelines should have upstream separation or filtration. Biogas and flare ga
Data Output and Meter Selection
Most custody transfer systems need more than a local display. Silver Instruments ultrasonic gas flow meters can output 4-20 mA HART, Modbus RTU, and pulse totalizer signals. A typical order for a gas utility in Indonesia used a DN100 meter on natural gas at 8 bar and 20 °C. The flow range was 120 to 2,400 kg/h. The 4-20 mA HART signal went to the flow computer, and Modbus RTU went to the site PLC.
We also check gas composition. Pipeline natural gas, nitrogen, oxygen, and biogas have different acoustic properties. If you send the gas composition, we set the meter calibration for the correct gas mixture. Do not assume a meter calibrated for natural gas works on biogas. It will not.
Specification Checklist Before You Contact Silver Instruments
Send us these details: pipe size (DN), pipe material, gas composition, flow range in kg/h or Nm3/h, operating pressure (bar), operating temperature (°C), signal output requirement, and hazardous area class. For custody transfer natural gas lines, also tell us the fiscal metering standard you follow, such as AGA Report No. 9 or ISO 17089.
Silver Automation Instruments is an industrial flow meter manufacturer and supplier. Our team can quote a complete meter body with flow conditioner, straight run spool, transducers, and local display. Contact Silver Automation Instruments by phone at +86-25-68650347 or by Whatsapp at +86-25-52155837. WeChat is available at +86 15365082610. If you send your pressure, temperature, pipe size, and flow range, our engineers will reply with model selection and price.
FAQ
Q: Can ultrasonic gas flow meters be used for natural gas custody transfer?
A: Yes. Multipath transit time ultrasonic meters are accepted under AGA Report No. 9 and ISO 17089. They are common for natural gas pipelines from DN80 to DN600.
Q: What accuracy do I need for custody transfer?
A: Look for ±0.5% of reading or better from 0.5 to 30 m/s. Repeatability should be ±0.1% to ±0.2% of reading. Ask for the calibration certificate and multipath verification report.
Q: Does Silver Instruments supply meters for high pressure gas pipelines?
A: Yes. We supply inline ultrasonic gas meters for standard pressures up to 40 bar and can quote higher pressure designs up to 100 bar with the correct flange rating and transducer material.
Q: What output signals are available?
A: 4-20 mA HART, Modbus RTU, pulse totalizer, and local display. The combined output works with most flow computers and PLC systems.
Q: What information do you need for a quote?
A: Pipe size (DN), gas composition, pressure (bar), temperature (°C), flow range, piping layout, and output signal. Send this information by Whatsapp or phone and our team will respond with model selection and price.
Hot Product
Related AD
