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crude oil flow meter DN50
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crude oil flow meter DN50
# Crude Oil Flow Meter DN50: Selection Guide for Engineers and Procurement Managers
## Quick Answer
For crude oil metering at DN50 pipe size, choose a Coriolis mass flow meter when you need direct mass measurement with ±0.1% accuracy and no moving parts. For lower cost installations with moderate accuracy, oval gear or positive displacement meters work well for clean crude at viscosities up to 1000 cP. Send us your operating pressure (bar), temperature (°C), flow rate range, and viscosity data to get a suitable recommendation for your crude oil application.
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## Understanding the Challenge: Crude Oil at DN50
Crude oil is not a simple fluid. It comes with sand, wax, water, and gas. The viscosity changes with temperature. One day you might pump 50 cP crude. The next day, after a shutdown, you need to measure 500 cP fluid. This makes flow meter selection tricky for DN50 pipe installations.
A DN50 pipe handles flow rates typically between 2 and 40 m³/h for crude oil applications. But the actual range depends on your pump capacity and pipeline pressure.
Most engineers in Southeast Asia and the Middle East ask us the same question. They want a crude oil flow meter DN50 that works in their specific conditions. The answer is never one size fits all.
## Three Main Flow Meter Technologies for DN50 Crude Oil
### 1. Coriolis Mass Flow Meter
This is our most recommended option for crude oil at DN50. Why? Because Coriolis meters measure mass directly. They do not care about viscosity changes, temperature fluctuations, or gas entrainment up to a certain percentage.
**Silver Instruments recommendation:** Our Coriolis mass flow meter model SIT-CMF-DN50 works well for crude oil applications. 
It handles pressures up to 100 bar and temperatures from -50°C to +200°C. The accuracy is ±0.1% for liquids.
A customer in Malaysia uses this meter for crude oil transfer between storage tanks. They have sand particles in their crude. The meter has been running for 18 months without any maintenance issues.
**Pros:**
- Direct mass measurement, no density assumptions
- Works with changing viscosity
- No moving parts, low maintenance
- Can measure density and temperature simultaneously
**Cons:**
- Higher initial cost compared to other technologies
- Pressure drop can be higher at low flow rates
- Larger physical size for the same pipe diameter
### 2. Oval Gear Flow Meter (Positive Displacement)
Oval gear meters are mechanical. They have two rotating oval gears that trap fixed volumes of fluid. The rotation speed tells you the flow rate.
**Silver Instruments recommendation:** The SIT-OG-DN50 oval gear flow meter handles crude oil with viscosities from 1 cP to 1000 cP. Accuracy is ±0.5% for clean fluids.
Last year a paint manufacturer in Thailand asked us for a crude oil flow meter. They needed to measure heavy fuel oil for their boilers. They chose our oval gear meter. It has been running for 14 months with only one seal replacement.
**Pros:**
- Lower cost than Coriolis
- Works well with high viscosity crude
- Simple mechanical design, easy to maintain
- Good for batch and custody transfer applications
**Cons:**
- Moving parts wear over time
- Not suitable for abrasive crude with sand
- Cannot handle gas entrainment
- Accuracy drops at very low flow rates
### 3. Ultrasonic Flow Meter (Clamp-On Type)
Clamp-on ultrasonic meters attach to the outside of the pipe. They send sound waves through the fluid. The differenc『SILVER Official Website SERVICE』
User:flowgaugea0bc8Last Time:07/24/2026
