ISO 5167-5 cone-meter engineering
A 29° included-cone-angle differential-pressure flow meter supplied only through an individual Clause 7 flow-calibration route for compact liquid, gas and steam metering.
V-Cone Flow Meter — Self-Conditioning DP Measurement
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The center-body cone reshapes the velocity profile before differential pressure is measured. Shizhong's 29° included-cone-angle product is outside the ISO 5167-5 uncalibrated cone-angle envelope of 22.5° ± 5°, so it is not claimed as an ISO standard device. ISO 5167-5 geometry and formula values remain design references, while public product performance is established only by individual flow calibration under the ISO 5167-1 Clause 7 route.
Final specifications are confirmed against process data, piping, material, pressure class, applicable code and metrology requirements.
ISO 5167-5:2022 ENGINEERING BASIS
Shizhong supplies one mechanical concept through two clearly documented metrology routes. The ISO route uses the published uncalibrated coefficient only when the complete geometry, pipe size, beta ratio, Reynolds number, pressure ratio and installation are inside the standard envelope. The calibrated route is selected for lower uncertainty, extended scope or a project-specific meter body.
D 50–500 mm, β 0.45–0.75 and ReD 8×10⁴–1.2×10⁷ for full-pipe, single-phase, subsonic and non-pulsating flow.
C = 0.82 with 5% relative expanded discharge-coefficient uncertainty (k = 2) for the uncalibrated ISO geometry.
Covered bend cases require 3D or 6D upstream according to β, with at least 2D downstream. Other disturbances require an engineering review.
Use an individual full-flow calibration for lower uncertainty, extended geometry or operation outside the ISO envelope; coefficients are not transferred between meters.
Compact configuration
A compact package reduces impulse-line volume and simplifies skid integration. It is suited to process-gas, liquid and steam duties when access, temperature protection and condensate management are confirmed during engineering.
Engineered configuration
For utility and process pipelines, Shizhong confirms cone support, pressure taps, pressure class, materials, welding, NDE, lifting and the calibration basis against the approved process and piping data.
The ISO value above is uncertainty of the discharge coefficient—not total installed-system accuracy. Final uncertainty also includes differential pressure, density, dimensions, compensation, calibration, piping and commissioning effects. Any lower project target is stated only after sizing and, where required, individual calibration.
Request a detailed datasheet with dimensional drawings, material certificates and ordering information for V-Cone Flow Meters.
Production and documentation schedules are confirmed in the quotation after technical review and drawing approval.
Send your process data for an engineering review and a project-specific next step.