crude oil flow meter 4 inch

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# Quick Answer Silver Automation Instruments supplies industrial grade crude oil flow meters in 4 inch (DN100) size. Our 4 inch crude oil flow meters handle pressures up to 40 bar and temperatures from -40°C to +200°C. Common choices include Coriolis mass flow meters for custody transfer and oval gear flow meters for high viscosity crude. # Crude Oil Flow Meter 4 Inch: Industrial Grade Solutions for Heavy Oil Measurement Measuring crude oil in a 4 inch pipe is a common challenge for oil terminals, refineries, and pipeline operators across Southeast Asia, the Middle East, and Africa. The viscosity can be 200 cP or higher. Temperature swings from field conditions to heated storage. Your flow meter must handle all this without drifting calibration. A 4 inch crude oil flow meter typically operates at flow rates between 15 m³/h and 120 m³/h. Pipe schedule matters. A 4 inch Sch 40 pipe has a 102.3 mm ID. Sch 80 drops to 97.2 mm. We always ask customers for their actual pipe wall thickness before recommending a meter. ## Which Flow Technology Works for 4 Inch Crude Oil? **Coriolis mass flow meters** are the gold standard for custody transfer of crude oil. They measure mass flow directly. No temperature or pressure compensation needed. Silver Instruments offers a flanged 4 inch Coriolis meter rated for 40 bar with a 4-20 mA HART output. Accuracy is ±0.1% of rate for liquids. ATEX Zone 1 certification is available for hazardous areas. Last year a customer in Malaysia installed our 4 inch Coriolis meter at a palm oil refinery that also processes crude oil. They switched from turbine meters because the crude had entrained gas. The Coriolis meter handled gas slugs up to 15% by volume without crude oil flow meter 4 inch

losing accuracy. Their monthly measurement error dropped from 3% to 0.5%. **Oval gear flow meters** are a cost effective option for high viscosity crude oil. A 4 inch oval gear meter measures flow from 6 m³/h to 100 m³/h. Viscosity range goes up to 10,000 cP. Every gear rotation displaces a fixed volume. Accuracy stays at ±0.5% of reading across the flow range. We recommend 316L stainless steel housing with PTFE lined gears for sour crude. A distributor in Nigeria asked us for 4 inch oval gear meters for truck loading stations. They needed pulse output to a local totalizer. We supplied meters with a magnetic pickup sensor and weatherproof enclosure. No external power needed. **Electromagnetic flow meters** work for crude oil with water cut above 10%. The crude must have conductivity above 5 µS/cm. For dry crude with zero water content, electromagnetic meters fail. We see this application mainly in produced water reinjection lines where crude content is below 30%. ## Installation Considerations for 4 Inch Crude Oil Flow Meters Straight pipe runs matter. For a 4 inch Coriolis meter, we need 5D upstream and 2D downstream. That means 500 mm before the meter and 200 mm after. Oval gear meters need a strainer upstream with 500 micron mesh to protect the gears from sand and scale. Heat tracing is common for crude oil applications. The crude might arrive at 10°C and need heating to 40°C to reduce viscosity. Silver Instruments can supply meters with a heating jacket for steam or electric tracing. The jacket is carbon steel with 2 inch NPT connections. Pressure rating selection depends on your pumping system. A 4 inch 150 lb flange is good for 20 bar at 38°C. Class 300 lb handles 50 bar. For pipeline applications, we somet

crude oil flow meter 4 inch

crude oil flow meter 4 inch

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