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Palm Oil Flow Meter DN200: Tanker Terminal Custody Transfer Specs
Quick Answer: For DN200 palm oil custody transfer at tanker terminals, you need a Coriolis mass flow meter with 0.1 percent accuracy and OIML R117 certification. Direct mass measurement in kg or tonnes removes errors from temperature and density swings common with crude palm oil (CPO). Silver Automation Instruments supplies ATEX Zone 1 certified DN200 meters that handle 30 to 50 cP viscosity and flow rates up to 400 m³/h, exactly what a loading arm demands.
Why Coriolis Meters Win for Palm Oil Custody Transfer
Palm oil is non-conductive. That rules out electromagnetic flow meters straight away. Positive displacement (PD) meters work for a while, but the sticky, high-viscosity CPO wears down gears and rotors. We have seen customers in Sumatra replace PD meters every 18 months. Coriolis mass flow meters do not have moving parts, so there is nothing to jam or wear. They also give you mass flow directly. Custody transfer invoices are settled by mass, so you skip the density correction and temperature compensation needed with volumetric meters. In practice, Silver Instruments dual-bend Coriolis tubes maintain stable zero drift even after years of hot CPO cycles.
DN200 Sizing: Flow Rates at the Loading Arm
Most palm oil tanker terminal loading arms need 200 mm (DN200) pipes to move product fast without excessive pressure drop. Typical batch loading runs between 150 and 300 tonnes per hour. A DN200 Coriolis meter handles that window comfortably. Here is the thing: if you undersize to DN150, you push velocity too high. You get noise, cavitation, and long-term tube fatigue. At a jetty in Dumai, Indonesia, we sized a Silver Instruments DN200 meter for a terminal loading at 280 t/h. The pressure drop stayed under 0.6 bar, and the batch accuracy was within 0.08 percent in the first audit.
Essential Technical Specs for an OIML R117 System
For legal custody transfer of palm oil, the meter package must meet strict metrological demands. Silver Automation Instruments configures the DN200 meter with these base specs. Accuracy: plus minus 0.1 percent of rate for liquids, with repeatability better than 0.05 percent. Process temperature rating from minus 50 to 200 degrees Celsius, which covers heated CPO at typical 40 to 80 degrees Celsius. Wetted parts are 316L stainless steel; Hastelloy C22 is available for high acid crude palm oil. Viscosity range covers 1 to 2000 cP, so 30 to 50 cP CPO is measured in its linear sweet spot. Outputs include 4-20 mA HART, Modbus RTU, and an active pulse output for batch controllers. Certifications: ATEX Zone 1 Ex d, OIML R117 (or MID MI-005), and factory calibration traceable to ISO 17025. A local integrator can pair the meter with an Emerson DL8000 or a Silver Instruments batch computer.
Installation and Calibration at the Terminal
Coriolis meters are immune to flow profile distortion, but offshore terminals still require short straight pipe sections to isolate vibration. We recommend 5D upstream and 2D downstream on the DN200 line. Install a simple air eliminator just before the meter. CPO often carries entrained air from tank heating, and even small bubbles can cause measurement noise. Most engineers skip this part and then wonder why totalized batch volumes drift. Silver Instruments can supply a pre-assem
A Customer Snippet: CPO Loading in Dumai, Indonesia
Last year a palm oil trader in Riau asked us to replace an aging turbine meter on his tanker loading skid. The meter suffered from bearing failure because CPO residue hardened during idle periods. We proposed a DN200 Coriolis mass flow meter with a remote transmitter mounted five meters away from the loading arm to reduce heat stress. The meter has been running for fourteen months with zero maintenance. Batching is now controlled by a 4-20 mA HART loop connected to a Silver Instruments paperless recorder that also archives custody transfer tickets. The trader reduced trade disputes by over 90 percent because the mass total aligned perfectly with the weighbridge. As he put it, the invoice now matches the bill of lading, and the lab does not argue about density tables anymore.
Get a Quote: What Data We Need
Pricing for a DN200 palm oil custody transfer flow meter depends on temperature, pressure rating, and hazardous area certification. To release a firm quote, send us your CPO temperature in degrees Celsius, pipe size (DN), flow range in kg/h or tonnes per hour, and operating pressure in bar. We will propose the right meter model, transmitter type, and calibration certificate level. Visit our palm oil flow meter page at flow-meter.com.au or email your process details directly. We reply to terminal spec sheets within one business day.
Frequently Asked Questions
Can I use an electromagnetic flow meter for crude palm oil? No. CPO and refined palm oil are non-conductive. Electromagnetic meters require a minimum conductivity around 5 µS/cm, which palm oil does not reach. Coriolis mass flow is the accepted standard for custody transfer.
Which custody transfer certification applies for palm oil? OIML R117 is the most recognized standard for dynamic mass measurement of liquids. For European Union terminals, MID MI-005 is mandatory. Silver Instruments supplies meters with both certificates, and we can coordinate local verification with an Indonesian or Malaysian metrology authority.
Do I need online proving for a Coriolis meter? Online proving with a pipe prover is not required for Coriolis meters because they have no mechanical drift. However, terminals often verify the meter annually with a master meter or a weighbridge. This keeps the local weights and measures office satisfied.
How much pressure drop does a DN200 meter create during CPO loading? At 300 t/h, a typical Silver Instruments DN200 Coriolis meter produces a pressure drop of 0.5 to 0.7 bar for CPO at 50 degrees Celsius. The exact value depends on your pipe schedule and meter tube design. We send a hydraulic calculation sheet with every quote.
What happens if the palm oil temperature changes mid-batch? Nothing. Coriolis meters measure mass directly. A temperature shift from 45 degrees Celsius to 55 degrees Celsius changes oil density and volume, but the mass flow reading stays accurate. You do not need to compensate volume readings based on API or MPMS tables.