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Crude Oil Flow Meter DN100 Multi-Phase Extraction Alignment
Quick Answer: A DN100 Coriolis mass flow meter handles multiphase crude oil extraction with high precision. Direct mass flow and density output from Silver Automation Instruments eliminates the need for a test separator. Accuracy holds within ±0.1% even when free gas and water cut vary. A clean mechanical alignment of the DN100 meter body to the extraction pipe is what keeps the reading stable, not post-processing tricks.
Why DN100 Alignment Is Not a Small Detail
In practice, many field engineers install a 4 inch flow meter and then wonder why the numbers jump. The real issue often comes down to pipe stress and flange misalignment. When a Coriolis meter senses mass flow by tube oscillation, any external bending moment shifts the zero point. We have seen this on customer sites many times in Southeast Asia. In one case, a DN100 meter on a crude oil extraction skid in Malaysia read 2.3 tons per hour of ghost flow only because the stud bolts were tightened unevenly.
So, before you blame the signal converter, check the mounting. Use a dial gauge to verify flange parallelism within 0.5 mm across the DN100 face. Keep the upstream straight run at least 5 pipe diameters. Downstream, 2 diameters are enough for most multiphase lines. Silver Instruments ships each DN100 meter with a factory alignment report. Keep the pipe supports rigid. Do not let the meter carry the weight of the extraction pipe.
Multiphase Extraction Without a Test Separator
Crude oil from an extraction well carries oil, water, and gas. A traditional positive displacement meter or turbine gets wrecked by sand and slug flow. Electromagnetic meters do not read hydrocarbons. Ultrasonic meters struggle when gas fraction exceeds 3 percent. This is where a DN100 Coriolis meter from Silver Automation Instruments changes the game for small and medium operators.
Here is the thing. A Coriolis meter measures mass flow and density simultaneously. With a density reading, you can calculate the water cut and net oil mass, as long as the oil and water densities are known. No need for a big three-phase separator. A recent project in Nigeria used our DN100 model to meter 45 m³/h of crude with up to 25 percent water cut and 10 percent gas volume fraction. The meter sent 4-20 mA HART signals for mass flow, density, and temperature straight to a flow computer. The totalized net oil volume matched the LACT unit within 0.5 percent.
Material and Certification Choices for DN100 Crude Service
Most engineers skip this part and just ask for “stainless steel.” However, crude oil often carries H₂S and chlorides. For sweet crude, 316L wetted parts with Hastelloy C-22 drivers are safe. For sour service, we specify NACE MR0175 compliant materials. The measuring tubes can be duplex stainless steel or Hastelloy. Always tell us the H₂S partial pressure and chloride concentration.
All our DN100 meters for extraction sites come with ATEX Zone 1 or Zone 2 certification. The standard process connection is ANSI 150 or 300 RF flange, matching 4 inc
How We Supply and Price DN100 Multiphase Flow Meters
Silver Automation Instruments keeps a stock of DN100 Coriolis meters in our warehouse, ready for fast shipment to Australia, Southeast Asia, the Middle East, and Africa. The price depends on the material, pressure rating, and transmitter type. A basic 316L DN100 meter with a local display and 4-20 mA HART output costs less than you think, but we need your process conditions to quote.
We do not sell one-size-fits-all. Send us your pressure in bar, temperature in degrees Celsius, pipe size DN, and the minimum, normal, and maximum flow rates. Tell us the water cut and gas fraction if you know them. Our engineers will return a detailed quotation within one business day. Contact Silver Instruments via our website flow-meter.com.au and put “DN100 Crude Oil Multiphase” in the subject line.
Frequently Asked Questions
Can a single DN100 Coriolis meter handle slug flow in crude oil extraction?
Yes, it can survive intermittent liquid-gas slugs because the meter tubes are full-bore and robust. The transmitter firmware handles the brief two-phase spikes when you set the correct damping. In extreme slug conditions, we recommend a small upstream flow conditioner.
What is the minimum flow rate a DN100 Coriolis meter can measure accurately?
Typically 2 to 3 m³/h for crude oil with a density around 850 kg/m³. Below that, the Reynolds number drops and accuracy drifts. If your well produces less, we advise moving to a DN80 or DN50 meter for better turndown.
Does the meter need recalibration after installation on an extraction skid?
No, Silver Instruments calibrates each DN100 meter on a water and oil rig with a NIST-traceable reference. You only need to perform a field zero check when the pipe is full and at process temperature. The zero point stability is documented in the calibration certificate.
Can I use this DN100 meter for custody transfer of crude oil?
Yes, if you order the OIML R117 or MID MI-005 certified version. Many small tanker loading terminals in Africa and Asia use our DN100 Coriolis meters for fiscal measurement. Inform us during the quote stage; we add a high-resolution flow computer output and a tamper-proof seal.
What kind of maintenance does a DN100 multiphase Coriolis meter need on an offshore platform?
Almost none. There are no moving parts. You only need to check the flange bolts twice a year and blow out any debris from the transmitter junction box. In humid offshore environments, order the IP67 transmitter housing and keep the cable glands tight.
Start your project with a solid metering design. Send us your pressure (bar), temperature (°C), pipe size (DN), and flow range today. The Silver Automation Instruments team will give you a DN100 crude oil flow meter quote that matches your extraction alignment needs perfectly.