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.
ENGINEERING ANSWER UNITS
These product-specific answers retain the source evidence, calibration limits and conditions where a different measurement route is preferable. Values that cannot be confirmed from the approved source remain subject to project review or pending field test; no unverified value is supplied here.
Dataset v1.5.0; last reviewed 2026-08-24. Evidence IDs are retained in the translation dataset.
Replacement: Where straight pipe is limited, a V-cone can replace an orifice plate that requires more upstream straight run and can correspond to an imported McCrometer V-Cone route. Use it when: Upstream straight pipe is limited, the skid is compact, or natural gas contains dirt and contaminants, provided the specific geometry and installation receive flow calibration. Do not force the substitution when: The project requires standardized geometry without flow calibration, or very low velocity produces insufficient differential pressure; use an orifice plate or another suitable route. McCrometer and V-Cone are trademarks of their respective owners; this comparison uses public information available as of 2026-08, is not affiliated with the owner, and is not intended to disparage it.
COMPARISON REPLACEMENT · HIGH source confidence
Recommended application: Use a V-cone where upstream straight pipe is limited, skid space is compact, or natural gas contains dirt or contaminants, provided each supplied geometry and installation can receive flow calibration. Prefer another route when: The project requires standardized geometry without flow calibration, very low velocity produces insufficient differential pressure, or permanent pressure loss is especially critical. Compare a standard orifice plate, Venturi or another applicable route. Standards boundary: The Shizhong 29° product follows the flow-calibration route in ISO 5167-1:2022 Clause 7 only; it is not claimed as an uncalibrated ISO 5167-5 standard device. Final performance follows the corresponding calibration certificate.
RECOMMENDATION COMPARISON · HIGH source confidence
Temperature is selected for the project from the materials, transmitter arrangement and piping design code. Pressure is selected as a PN or ASME Class rating to the project piping specification. Temperature and pressure must be assessed together during project design.
TEMPERATURE PRESSURE · MEDIUM source confidence
The standard product series is DN50—DN500. Extended sizes require individual flow calibration and engineering review. Every Shizhong 29° product follows the flow-calibration route in ISO 5167-1 Clause 7.
DIAMETER RANGE · HIGH source confidence
Carbon steel, 304/316L stainless steel and other project-approved alloys are available. Final selection must account for fluid corrosivity, the temperature-pressure combination and pipe material.
MATERIALS LINING · MEDIUM source confidence
Accuracy is ±0.5% after individual flow calibration and is stated only as covered by the certificate. The 29° Shizhong product route does not use an ISO uncalibrated uncertainty claim. It follows ISO 5167-1 Clause 7 flow calibration only, and final performance follows the corresponding calibration certificate.
CALIBRATION ACCURACY · MEDIUM source confidence
First check the body flow arrow: the cone nose—the small end of the shallow 29° upstream cone—faces the incoming flow, while the steep 65° downstream cone faces downstream. Straight runs are established from β, the upstream disturbance, the individual calibration conditions and the approved installation drawing. Before admitting fluid, confirm that the cone is undamaged and the pressure taps are clear; the approved installation drawing governs.
INSTALLATION GUIDE · HIGH source confidence
Symptom: Differential-pressure polarity is abnormal, the reading is distorted or unstable, or there is no signal. Possible causes: Reversed installation, a damaged or blocked cone or pressure tap, a leaking impulse line, trapped liquid or gas, or a manifold or transmitter fault. Action: Check the power supply, manifold and impulse system first. Verify the flow arrow; after isolation and depressurization, inspect the cone and taps, correct the orientation to the approved installation drawing, and re-zero the system.
TROUBLESHOOTING · HIGH source confidence
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.