>
>
2026-09-01
A large petrochemical complex in the Middle East faced critical challenges in measuring dilution steam flow to the furnaces in their Olefins plant. Accurate dilution steam measurement is essential for reducing hydrocarbon partial pressure and suppressing coke formation—flow fluctuations directly impact tube temperature profiles and cracking selectivity.
Country/Region: Middle East (large petrochemical integrated complex)
Application: Olefins plant dilution steam, temperature approx. 180-200°C, pressure approx. 10 bar abs, steam quality variable
Key Configuration Requirements: DN 100-150, 316L wetted materials, hazardous area approval, 4-20mA HART output
Delivery Request: 30 days (emergency retrofit project)
The customer faced critical pain points:
Orifice plate fouling causing reading drift: Hydrocarbon deposits and iron oxide accumulated on the orifice plate surface, forming a thick scaling layer that caused differential pressure signal drift and frequent flow reading fluctuations.
Water hammer and thermal shock risk: Condensate accumulation during steam line startups/shutdowns had previously damaged vortex flowmeter sensors.
Serious safety concerns: Unreliable flow readings created tube over-temperature risks—insufficient dilution steam leads to rapid coking and potential tube rupture, representing a major process safety hazard.
After on-site assessment and technical selection, the Proline Prowirl F 200 vortex flowmeter (Model: 7F2C, DN 100, 316L, HART output, with integrated temperature measurement - Option CA) was recommended.
| Technical Feature | Parameter / Basis |
|---|---|
| Measuring Principle | Karman vortex street, DSC capacitive sensor |
| Sensor Technology | Pure mechanical-to-capacitance conversion, no electronics contacting medium |
| Thermal Shock Resistance | > 150 K/s |
| Water Hammer Resistance | Proven through condensation flashing and water hammer testing |
| Fouling/Blockage Resistance | Gap-free design, DSC sensor fully independent from bluff body |
| Accuracy (Volume Flow) | Steam/gas: ±1.0% o.r. (PremiumCal option: ±0.65%) |
| Repeatability | 0.1% o.r. |
| Medium Temperature Range | -200 to +400°C |
| Max. Process Pressure | PN 100 / Class 600 |
| Built-in Diagnostics | Heartbeat Technology for online verification |
Fouling-resistant structure: The DSC sensor features no gaps or holes where deposits can accumulate between sensor and bluff body—the core failure point of orifice plate installations.
Vibration and water hammer immunity: The mechanically balanced DSC sensor design is inherently insensitive to external pipe vibration and has been validated against water hammer impact.
Lifelong calibration stability: Under non-abrasive media conditions, bluff body edge wear tolerance reaches 1 mm—the factory calibration factor remains valid for the equipment's lifetime.
"Since installing the Prowirl F 200, dilution steam flow readings have changed from 'constantly fluctuating' to 'stable and reliable'—operators can finally adjust furnace tube temperatures based on real flow data. More importantly, we no longer worry about tube over-temperature risks caused by flow misreading. Heartbeat Technology's online verification also shifts our maintenance strategy from 'reactive repair' to 'proactive intervention'."
— Site Instrumentation Engineer
| Key Metric | Improvement |
|---|---|
| Measurement Stability | From unstable readings → stable continuous output |
| Fouling Maintenance | From monthly orifice cleaning → maintenance-free operation |
| Thermal Shock Damage Risk | From frequent sensor failures → 150 K/s certified |
| Safety Integrity | From measurement safety hazard → SIL 2/3 certified |
For Olefins dilution steam applications involving trace hydrocarbons and frequent process fluctuations, selecting a vortex flowmeter with fouling-resistant design and water hammer/thermal shock certification is a fundamental engineering decision for process safety and continuous operation.
ติดต่อเราตลอดเวลา
