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Palm Oil Flow Meter DN200 for Tanker Terminal Custody Transfer
Quick Answer: A DN200 Coriolis mass flow meter with custody transfer approval, stainless steel wetted parts, and ±0.1% accuracy handles palm oil loading at tanker terminals reliably. Silver Instruments recommends the SICOR series mass flow meter, factory calibrated for palm oil viscosity and temperature, with PTB or NMi certification. This meter meets port authority requirements in Malaysia, Indonesia, and Colombia.
Why Palm Oil Custody Transfer Needs a Dedicated DN200 Meter
Tanker terminals load crude palm oil at high flow rates through DN200 pipes, typically between 200 m3/h and 400 m3/h. Palm oil leaves the refinery at 50 °C to 60 °C, with viscosity around 20 cP to 30 cP. The liquid is not a simple hydrocarbon. It contains free fatty acids, traces of moisture, and solids from mill processing. A flow meter that works well on diesel or gasoline will drift on palm oil. That drift costs money on every ship load, because custody transfer means the buyer pays for what the meter registers.
Plant engineers in Southeast Asia have seen this on site many times. A standard turbine meter with PT100 temperature compensation cannot correct for the density shifts when the palm oil grade changes from CPO to CPKO. In practice, the only direct measurement that holds its accuracy is mass flow. We skip volumetric conversion completely.
Recommended Meter Type and Silver Instruments Model
Silver Automation Instruments supplies the SICOR Coriolis mass flow meter in DN200 size with custody transfer type approval. This meter measures mass flow directly in kg/h or t/h. Density measurement is built in, so you also get live density in kg/m3 and temperature in °C. Accuracy under custody transfer conditions is ±0.1% of rate for liquids. For a loading rate of 350 m3/h of palm oil, that means the meter uncertainty band is less than 350 kg per hour. Over a 5,000-tonne ship load, the total measurement uncertainty drops well below 0.1% of the batch total.
The wetted parts are 316L stainless steel, suitable for food-grade palm oil lines. The meter comes with a remote transmitter, 4-20 mA HART output, pulse output for the prover loop, and Modbus RS485. Enclosure rating is IP67, and the sensor complies with ATEX Zone 1 and IECEx for tanker terminal hazardous areas. Process connection is PN16 or ANSI 150 flange, DN200, raised face.
Field Data from a Terminal in Johor, Malaysia
Last year a terminal operator in Pasir Gudang, Johor, replaced two old positive displacement meters with one SICOR DN200 Coriolis meter on their palm oil loading arm. Their range was 180 m3/h to 420 m3/h, line pressure 8 bar, operating temperature 55 °C. The old meters needed re-calibration every three months because the mechanical clearances changed. The new Coriolis meter has no moving parts. After 14 months of service, the meter factor on the prover loop stayed within 0.05% of the factory calibration. The terminal now uses the density reading to detect product interface between CPO and water slugs during line clearing. That alone saved them one contaminated shipment.
Specifications for Palm Oil DN200 Custody Transfer Flow Meter
Here are the key specifications you need in a tender or datasheet for a palm oil DN200 custody transfer flow meter:
Nominal diameter: DN200 (8 inch). Flow range: 0 to 500 000 kg/h (mass), turndown 20:1. Accuracy: ±0.1% of rate for liquids, ±0.0005 g/cm3 for density. Repeatabi
Installation Notes for Tanker Loading Arms
Most engineers skip this part during planning and regret it later. A DN200 Coriolis meter weighs around 450 kg. The loading arm structure must support the meter weight. Install the meter with a straight run of 5D upstream and 2D downstream, even if the manufacturer says zero straight run. The loading sequence causes sudden pressure surges when the valve opens. Install a flow straightener upstream if space is tight. The meter pipe must stay full at all times. Partial filling causes severe density errors. Use a back-pressure valve downstream to keep 1 bar minimum at the meter outlet. Connect the pulse output to the flow computer for custody transfer totalizing. The density alarm set at 0.87 g/cm3 to 0.92 g/cm3 flags water contamination or product change.
FAQ
Can I use an oval gear flow meter for palm oil custody transfer instead of Coriolis? Oval gear meters work on viscous palm oil, and a DN200 size is available. But custody transfer standards like OIML R117 require traceability. Most oval gear meters without additional density compensation do not meet the ±0.1% mass accuracy required at batch level. Terminals in Southeast Asia now prefer Coriolis because there is no gear wear from solid particles in the oil.
What flow computer does Silver Instruments recommend for the SICOR DN200 meter? We integrate the meter with OMNI 3000 or FloBoss S600+ flow computers. The pulse output connects directly, and the density signal comes via HART. We pre-configure the meter with the flow computer parameters if you provide the product density range.
Is the meter PTB approved for Indonesian and Malaysian terminals? The SICOR series custody transfer version has OIML R117-1 certification, which is accepted by Metrology Malaysia and Badan Standardisasi Nasional in Indonesia. For Colombian terminals, we also provide the NMi certified version on request.
How do you handle high free fatty acid percentage in crude palm oil? Standard 316L wetted parts handle FFA up to 5% without issue. For higher FFA or acid number above 10, we specify Hastelloy C22 sensor tubes. No recalibration is needed because Coriolis measures mass flow independent of chemistry.
Can the meter detect air in the line during tanker loading? Yes. The density output drops sharply when air or foam enters the meter. Set the density low-limit alarm at 0.80 g/cm3. The transmitter outputs an alarm via relay or Modbus register for automated shutdown.
Send us your palm oil pressure (bar), temperature (°C), pipe size (DN), and flow range (m3/h or t/h) for a Silver Instruments SICOR DN200 custody transfer meter quotation. We configure the meter for your exact process conditions and ship with a 5-point calibration certificate traceable to NIST or PTB standards.
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