Standardized Stainless Steel Orifice Plate
Provides 19.05 mm concentric bore with 90° sharp upstream edge and 45° downstream bevel.
Chemical & Process Engineering / Orifice Plate Flowmeter
FREE TO EXPLORELABORATORY 02 · CHEMICAL & PROCESS ENGINEERING
Orifice Plate Flowmeter Calibration & Permanent Head Loss Analysis
Calibrate a concentric sharp-edged orifice plate flowmeter in a closed-loop pipe network, measure differential pressure across flange taps vs volumetric flow rate, and evaluate discharge coefficient C_d and permanent pressure loss. Explore interactive transport phenomena, unit operations simulation, and chemical engineering telemetry.
TRANSPORT PHENOMENA · UNIT OPERATIONS · PROCESS CONTROL · REACTION ENGINEERING
Your virtual chemical and process engineering laboratory.
DIFFERENTIAL PRESSURE SQRT(ΔP)—
PROCESS & PILOT PLANT TELEMETRY
Ready to sample with Flow Q = 24.0 L/min.
Adjust Flow Q, then execute chemical process trial.
Chemical and process engineering telemetry is evaluated rigorously using 64-bit IEEE 754 precision. Residuals reflect ordinary least-squares regression across successive observations. Continuous data structures support high-fidelity transport phenomena and unit operations modeling.
Process engineering assumptions and boundary condition limits
The transport and thermodynamic models apply within the specified calibrated operating window (8.0 to 48.0 L/min). Configured with a 38.1 mm (1.5-inch) pipe and orifice bore d = 19.05 mm (diameter ratio β = 0.50). Pressure measured via flange taps 25.4 mm upstream and downstream of plate face. Linear regression relates sqrt(ΔP) directly to volumetric flow rate Q.
Process apparatus & industrial sensors.
Instrumented Pipe Spool with Flange Tappings
Houses orifice plate between ASME Class 150 flanges with precision 25.4 mm tap locations.
Differential Pressure Electronic Transmitter
Measures flange differential pressure ΔP from 0 to 100 kPa with 0.05% span accuracy.
Centrifugal Process Circulation Pump
Delivers steady liquid flow through the metering run across 5 to 60 L/min.
Downstream Piezometer Array
Monitors pressure recovery profile 1, 2, 4, and 8 pipe diameters downstream to evaluate permanent loss.
High-Accuracy Coriolis Mass Flowmeter
Provides reference mass flow rate and fluid temperature logging for metrological traceability.
FOLLOW THE METHOD
A reason behind every step.
Calibrate a concentric sharp-edged orifice plate flowmeter in a closed-loop pipe network, measure differential pressure across flange taps vs volumetric flow rate, and evaluate discharge coefficient C_d and permanent pressure loss. Standardized parameter settings: 8.0, 16.0, 24.0, 32.0, 40.0, 48.0 L/min.
01
Zero Calibration & Line Bleeding
Isolate the DP transmitter manifold, open the equalizing valve to verify zero differential reading (0.00 kPa), and bleed air from pressure tapping impulse lines.
02
Initial Low-Flow Stabilization
Crack open the pump throttling valve until reference flow rate Q reads 8.0 L/min; allow flow and digital pressure readings to stabilize for 60 seconds.
03
Flange Differential Pressure Logging
Record differential pressure ΔP across flange taps in kilopascals, alongside reference flow rate and liquid temperature.
04
Flow Rate Increment Protocol
Advance flow rate in uniform increments through 16.0, 24.0, 32.0, 40.0, and 48.0 L/min, recording steady-state differential pressure at each step.
05
Permanent Head Loss Determination
Measure downstream static wall pressure at tap station 8D downstream of the plate to compute permanent unrecovered pressure loss ΔP_perm.
06
Calibration Model Regression
Calculate sqrt(ΔP) for each run, plot sqrt(ΔP) versus Q, and fit a linear regression through the origin to evaluate calibration sensitivity S and discharge coefficient C_d.
YOUR NOTEBOOK · 0 OBSERVATIONS
Turn measurements into chemical process engineering insight.
Points are your recorded observations. The solid regression line validates Orifice Plate Flowmeter mathematical scaling.
LINEAR REGRESSION FIT · y = mx + b
sqrt(ΔP) = S · Q = 0.6120 · Q
| # | Water Flow Rate Q (L/min) | Differential Pressure Sqrt(ΔP) (kPa^0.5) | Volumetric flow rate Q (L/min) | Square root of differential pressure sqrt(ΔP) (kPa^0.5) | Remove |
|---|
No readings yet. Execute a process trial and record it.
Calculate it yourself.
CHECK YOUR UNDERSTANDING
Explain what the process engineering metrics mean.
The vena contracta in an orifice plate flowmeter is located:
The discharge coefficient C_d of a standard sharp-edged orifice plate is approximately:
Permanent pressure loss across an orifice plate is primarily caused by:
If an orifice plate has diameter ratio β = 0.50, the approximate fraction of differential pressure permanently lost is:
THEORY AND UNIT OPERATIONS CONTEXT
Process engineering background & physical principles.
In chemical process manufacturing, square-edged concentric orifice meters are the most prevalent differential pressure primary elements owing to their mechanical simplicity, rigorous standardization (ISO 5167 / ASME MFC-3M), and low manufacturing cost. An orifice plate consists of a thin metal disc with a precision sharp upstream edge installed perpendicularly across a conduit. As fluid approaches the restriction, streamlines converge beyond the physical orifice opening to form a minimum cross-sectional area termed the vena contracta, where flow velocity peaks and static wall pressure plummets to a minimum. Unlike the guided contour of a Venturi meter, the jet exiting the orifice expands abruptly into the downstream pipe, generating intense turbulent recirculating eddies that dissipate a substantial fraction of kinetic energy into irreversible viscous thermal friction. Consequently, the discharge coefficient C_d of a sharp-edged orifice plate is significantly lower (typically 0.60 to 0.62), and permanent pressure loss accounts for 60% to 75% of measured differential head. In this experiment, flange tapping pressure differences are monitored across an orifice plate to establish calibration sensitivity S, verify square-root scaling, and calculate discharge coefficient C_d.
sqrt(ΔP) = S · Q = 0.6120 · Q
Configured with a 38.1 mm (1.5-inch) pipe and orifice bore d = 19.05 mm (diameter ratio β = 0.50). Pressure measured via flange taps 25.4 mm upstream and downstream of plate face. Linear regression relates sqrt(ΔP) directly to volumetric flow rate Q.