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Kerosene Flow Meter DN80 Custody Transfer: Verification and Sensor Selection
Quick Answer
For custody transfer of kerosene through a DN80 line, Silver Instruments supplies Coriolis mass flow meters with 0.1% accuracy and OIML R117 certification. We also provide factory calibration certificates traceable to ISO 17025 and can connect you with local metrology labs for onsite verification. Send us your flow range (m³/h), pressure (bar), and kerosene density (kg/m³) to get a sensor recommendation and quote.
Kerosene is a light distillate with viscosity around 1.5 to 2 cP at 20 °C. That low viscosity and its clean nature make it easy to measure. But when you measure for custody transfer, accuracy, repeatability, and legal traceability become non-negotiable. DN80 is a common pipe size at loading racks, barge terminals, and tank truck filling stations. A mismatch between flow meter type and actual kerosene properties can cause a 0.3% to 0.5% measurement drift every few months. We have seen this in two petroleum depots in Malaysia and Mexico last year.
Volume-based meters like turbine or positive displacement flow meters need frequent recalibration when kerosene density shifts with temperature. A DN80 turbine flow meter can show 0.2% deviation just from a 5 °C change in kerosene temperature. Because the volume expands, but the mass stays the same. Custody transfer contracts are written in mass or standard volume. This is why most engineers now skip compensating and use a Coriolis mass flow meter directly.
Silver Instruments offers the SCF series Coriolis mass flow meter with DN80 flanges. The sensor body is 316L stainless steel, compatible with kerosene without any liner degradation. The transmitter outputs 4-20 mA HART, pulse, and Modbus RTU. You can get ATEX Zone 1 or Class I Div 2 certification for loading areas. The factory calibration covers 5-point water calibration at our test bench and then a kerosene-specific adjustment using a secondary standard Coriolis master meter. The accuracy statement is ±0.1% of rate for liquids in the 20:1 turndown range.
Verification without removing the meter
In practice, most custody transfer meters need verification every 6 to 12 months. You do not always have to pull the meter. A Silver Instruments Coriolis meter has internal diagnostics that check drive gain, tube frequency, and pickoff voltage. These health parameters tell you if the meter has coating, erosion, or gas bubbles. One customer in Vietnam uses a portable Coriolis master meter to verify our DN80 unit on the kerosene loading arm. They connect both meters in series once a year. The deviation must be less than 0.15%. If it passes, they extend the recalibration interval by 12 months. That simple field check has saved them 3 weeks of downtime annually.
We also ship our flow meters with a NIST-traceable calibration certificate and can arrange a test against a volume prover if your country follows API MPMS Chapter 4 or ISO 7278. For contracts written in standard volume at 15 °C, our t
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Installation tip for DN80 kerosene lines
Most mistakes happen in the installation, not the meter itself. A DN80 Coriolis meter can be installed in horizontal or vertical pipe. But you must avoid air pockets. If your loading arm has a drop pipe that causes syphon effect, add a back-pressure valve downstream of the meter. Two years ago a fuel distributor in Peru had a 0.4% offset because of a half-empty pipe after the meter. A simple check valve fixed it. The meter itself had zero shift in factory calibration.
What to send us for a fast quote
When you request pricing for a kerosene flow meter DN80 custody transfer, include these six values: flow range in m³/h or L/min, operating pressure in bar, kerosene density at 15 °C or API gravity, process temperature range, hazardous area classification if any, and flange standard (ANSI 150, PN16, JIS 10K). This lets us confirm the meter size, body material, and transmitter configuration in one reply. Our sales engineers will also suggest the right flow computer if you need totalized mass printing for delivery tickets.
Frequently Asked Questions
Can a Coriolis meter measure kerosene for custody transfer without proving?
Yes, if the meter has OIML R117 or MID MI-005 approval and the factory calibration is performed according to national standards. Many countries accept Coriolis meters as primary custody transfer devices. You still need periodic verification with a master meter or prover to meet local weights and measures rules.
What is the typical lifespan of a DN80 Coriolis meter on kerosene?
With clean kerosene and proper installation, the sensor itself lasts 15 to 20 years. The transmitter may need an upgrade after 10 years. We have units running in a terminal in Singapore since 2009 with no zero drift.
Do you supply a meter with totalizer and ticket printer for truck loading?
We offer Coriolis meters with pulse output that connect to flow computers like the OMNI 3000 or our own batch controller. The combination prints a delivery ticket with mass total, temperature, and date. Ask for a complete package drawing when you send your specs.
How often should I compare the meter reading to a master meter?
For kerosene custody transfer, we recommend verification every 12 months. If your national regulations require more frequent tests, the internal diagnostics log can be used to request an extension in some jurisdictions.
Can you help with onsite verification in West Africa or Latin America?
We do not send our own engineers to all regions. But we partner with independent metrology service companies in Nigeria, Angola, Brazil, and Mexico. When you purchase a Silver Instruments meter, we pass you their contact details so you can negotiate a local verification contract directly.