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Coriolis Type Mass Flow Meter: High-Accuracy Slurry and Petroleum Monitors
Quick Answer: For slurry and petroleum measurement where density changes, entrained air, or high viscosity make volume-based metering unreliable, a Coriolis mass flow meter from Silver Automation Instruments directly reads mass flow and density. Typical accuracy reaches ±0.1% of rate with turndown ratios up to 50:1. Send us your pipe size (DN), flow range (kg/h or t/h), pressure (bar), and temperature (°C) to get a quote for a direct mass meter that ignores fluid property swings.
Why Direct Mass Measurement Matters in Slurry and Petroleum
Volume flow meters like turbine, electromagnetic, or ultrasonic units calculate flow by first measuring velocity. They need separate density inputs or assume a fixed density to output mass. Slurry density in mining changes every batch. Crude oil density shifts with temperature and API gravity. A coriolis meter bypasses these corrections. It swings a tube and reads mass directly. This makes custody transfer, process control, and batching far more repeatable.
How the Coriolis Principle Handles Problematic Fluids
The meter vibrates one or two tubes at their natural frequency. Fluid passes through and creates a phase shift in the oscillation. The phase shift is proportional to mass flow rate. Tube frequency gives fluid density. So you get mass flow (kg/h), density (kg/m³), and temperature in real time. Slurry with 40% solids content still yields correct mass flow because the principle is independent of conductivity, velocity profile, and entrained air. We have seen mining operations in Western Australia use our DN25 Coriolis meter on magnetite slurry lines where electromagnetic meters lost signal due to solids coating. The Coriolis meter kept logging mass flow without interruption.
Specific Applications in Petroleum and Slurry
For loading terminals in Southeast Asia, a DN50 Coriolis meter measures diesel and gasoline with ±0.1% accuracy. The meter also reports density at 15°C according to ASTM D1250 with built-in API tables. This cuts out a separate density meter. In Papua New Guinea, a palm oil refinery uses our DN80 Coriolis meter for crude palm oil loading. The fluid can be 50°C to 80°C with viscosity up to 80 cP. A turbine meter would read 4% to 6% low when viscosity rises. The Coriolis meter stays within 0.15% across the range.
For slurry, the wear-resistant option is a straight-tube or dual bent-tube design lined with polyurethane or PTFE. One customer in Mexico measures lime slurry at 30% solids. They used to flush electromagnetic electrodes every week. With a Coriolis meter, maintenance dropped to quarterly visual checks. The meter has no electrodes, no moving parts, and no wear sensors. It just works.
Installation Details Engineers Care About
Most engineers skip this part: you do not need long straight pipe runs. Unlike vortex or turbine meters, a Coriolis meter needs zero upstream straight run if you install it after a pump or an elbow. This saves space on a skid. Silver Instruments ships each meter with a factory calibration certificate traceable to national standards. The transmitter outputs 4-20 mA HART, pulse, and Modbus RTU. You can also set density alarms for high/low limits. For ATEX Zone 1 or Zone 2 areas, we provide Ex d or Ex ia certified meters. A liquor blending plant in Nigeria uses our Ex d DN40 Coriolis meters with remote transmitters. The transmitter sits 50 metres away in a safe area. No issue.
Typical Specifications That Affect Your Process
Here is what to look for in a datasheet. Flow accuracy is up to ±0.1% of rate for liquids. Density accuracy reaches ±0.001 g/cm³. Repeatability is better than 0.05% of rate. Process temperature from -50°C to +200°C for standard models, with high-temp versions up to +350°C on request. Wetted materials are 316L stainless steel, Hastelloy C22, or PTFE lining for corrosive slurry. Pipe sizes from DN10 up to DN200. Nominal pressure rati
Common Pitfalls in Slurry and Petroleum Measurement
One: installing a Coriolis meter in a vertical line with downward flow while measuring slurry. Solids can settle and cause imbalance. Always flow upward through a vertical meter if slurry is abrasive. Two: forgetting to select the correct housing ingress protection. In open-pit mining, dust and water spray demand IP67 or IP68 as standard. Three: ignoring vibration cross-talk. Sometimes a nearby hammer mill transmits vibration to the meter pipe. Use flexible connections or vibration isolators. Silver Instruments can review your piping layout before you order. Send us a sketch and we will suggest the meter orientation.
Cost Justification for SMEs
The initial purchase price of a Coriolis meter is higher than an electromagnetic flowmeter of the same DN. But here is the thing. A magnetic flow meter cannot measure density or mass. It cannot handle hydrocarbons. A custody skid with separate flow meter, densitometer, and flow computer costs more in total and needs more spares. When a 10-100 person SME compares total installed cost, the Coriolis option often wins, especially for applications with multiple product grades. One chemical distributor in Malaysia saved 12,000 USD in annual maintenance by replacing positive displacement meters with four DN25 Coriolis meters. No more gear replacements, no more recalibration every three months.
Getting a Quote That Matches Your Real Conditions
Do not send an email saying "I need a Coriolis flow meter price". Instead send: "We pump diesel at 20 m³/h, operating pressure 12 bar, normal temperature 40°C, pipe size DN50, need Modbus output and local display, installation in Saudi Arabia non-hazardous area". We will return a quote within 24 hours that includes the correct flow tube material, transmitter options, and an estimated delivery schedule. You can reach the Silver Automation Instruments team at Tel: +86-135-1213-1526, Whatsapp: 86-135-12131526, or WeChat: +86 13512131526. Request a datasheet for Coriolis slurry monitors or petroleum custody transfer meters and include your process fluid name and viscosity if known.
FAQ
Q1: Can a Coriolis meter handle slurry with large particles?
A: Yes, if the pipe size is correctly selected. For particles larger than 1 mm, use a straight-tube design or a larger DN to avoid blockages. Silver Instruments can calculate the minimum bore required based on your slurry analysis.
Q2: Is Coriolis suitable for bunkering fuel oil with high viscosity?
A: Absolutely. Our meters measure heavy fuel oil with viscosity up to 500 cP without accuracy loss. Density output also helps detect fuel blending issues. Many bunker operators in Singapore use Coriolis meters for this reason.
Q3: What maintenance does a Coriolis meter need in mining slurry?
A: Minimal. There are no electrodes to clean and no moving parts. Inspect tube coating thickness every 6 months if slurry is abrasive. Transmitter electronics are self-diagnostic with error codes displayed locally.
Q4: How do I verify the meter accuracy on site?
A: You can perform a zero check with the tubes full and flow stopped. For custody transfer, we recommend annual calibration with a master meter or weigh tank. Silver Instruments can supply a portable proving system on request.
Q5: Can the meter output net oil flow for oil and water mixtures?
A: Yes, by measuring total density and comparing against known oil and water densities, the transmitter can compute net oil mass flow. This is used in offshore production separators. We can configure this function before shipment.
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