INDUSTRY SOLUTION
Rugged flow measurement for blast-furnace and coke-oven gas, combustion air, cooling water, oxygen-service utilities and severe steelmaking processes.
ENGINEERING CONTEXT
Metallurgical plants present large pipe and duct sizes, dust loading, condensate, wide flow variation, vibration and limited shutdown access. A useful measurement system must create enough differential pressure without imposing excessive loss, keep pressure connections serviceable and provide a coefficient basis that remains valid for the as-built duct, disturbance and operating range.
APPLICATION REVIEW
Large gas lines require an accurate internal diameter or duct geometry, operating pressure and temperature, composition, moisture and dust loading. The review checks whether the flow is adequately single phase, whether condensation can collect in taps or impulse lines and whether minimum velocity provides a measurable signal. Standard volume or mass flow requires a documented density and compressibility basis; a fixed conversion should not be used across a wide operating envelope without an uncertainty check.
An averaging differential-pressure probe can be practical for large pipes and ducts because it limits permanent pressure loss and installation mass, but the support, resonance, blockage resistance, insertion position and coefficient basis must match the actual geometry. Venturi and cone meters may be evaluated for round pipes where pressure recovery or a compact spool is important. Dust, deposits and erosion require accessible taps, an inspection plan and, where needed, purge or cleaning provisions that are included in the performance basis.
The upstream layout is especially important near fans, dampers, headers, bends and branches. These disturbances can create swirl and non-uniform velocity profiles that a longer straight run may not fully correct. The proposal should show the measurement plane, available straight lengths, support arrangement and any flow-conditioning or calibration requirement. For oxygen-enriched service, cleanliness, materials and ignition-risk controls follow the customer's dedicated oxygen-service specification.
RECOMMENDED FAMILIES
These product families form an initial shortlist. Final geometry, coefficient basis, materials, transmitter arrangement and installation requirements are confirmed from the complete process duty.
Recommendations remain preliminary until process conditions and project requirements are reviewed.
TECHNICAL RESOURCES
FREQUENTLY ASKED
Large diameters, low or varying velocity, dust, condensate, vibration and distorted profiles can all affect the DP signal and coefficient. The meter, taps, support and maintenance method must be designed as one system for the actual line and disturbance.
No. Duct geometry, velocity distribution, probe support, resonance, blockage risk, available straight run and the calibration or coefficient basis must be reviewed. Rectangular or non-standard ducts often need a project-specific traverse or calibration plan.
Send your process data for an engineering review and a project-specific next step.