Orifice dP & bore
Enter a preliminary bore diameter and review beta, governing dP and the four flow/pressure scenarios.
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Engineering tools for process applications
Calculate differential pressure, bore/beta checks, velocity and plate thickness for liquid and gas operating conditions.
Quick calculation · Free for visitors and inactive subscribers. Review bore, beta and dP at maximum flow and maximum pressure. Subscribe for detailed checks, saving and PDF reports.
Enter your operating conditions and preliminary bore. Unit changes preserve the underlying quantity. Calculated values appear in the grouped results.
Microsoft Excel-based gas and liquid orifice sizing sheets, available separately through a one-off purchase.
Enter the conditions once and review connected results in clearly labelled groups.
Enter a preliminary bore diameter and review beta, governing dP and the four flow/pressure scenarios.
Review pipe velocity at maximum flow and the associated operating-status flag.
Calculate required minimum thickness, selected-thickness margin and preliminary structural checks.
Separate liquid and gas methods, with their applicable inputs and checks.
Operating density, viscosity, vapor pressure and flow conditions.
Operating density, molecular weight, derived compressibility and standard flow.
See sample case below, shown at rounded display precision.
Static sample case. Your results depend on your entered conditions. Engineering sign-off is required before design use.
Adriel Technical Solutions
The calculator implements ISO 5167-based liquid and gas orifice sizing methods. Results must be reviewed by a qualified engineer for the actual operating conditions, installation geometry, methodology limits and applicable design requirements. Preliminary plate-thickness screening is not a final structural or buckling certification. Results are not OEM-provided validated sizing results.
Read product FAQsHow it works
A simple, guided work flow to help you calculate, review and document your orifice sizing results
with confidence.
Input your process and
fluid data.
Get instant results with
engineering checks and warnings.
Keep your calculations
for future reference.
Prepare a professional
PDF report.
Learn about the calculations, assumptions and engineering approach behind the calculator.
View MethodologyReview the limitations and required engineering checks before applying results to a design.
Read DisclaimerUse Load liquid example or Load gas example to inspect a complete set of inputs. Subscribers can calculate the result, review every section and export the PDF.
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Keep the context with the calculation
Subscribers can calculate, save and export results. Saved records remain readable when a subscription expires.
Explore the full work flowTransparent engineering methodology
The Rev C liquid and gas methods calculate differential pressure from the entered bore and operating conditions, with flow-specific coefficients and engineering checks.
Review calculation details, the four pressure/flow scenarios, structural screening and status flags. Gas results include derived compressibility, expansion factor and permanent pressure loss. Engineering sign-off is required before design use; results are not OEM-provided validated sizing results.
Practical answers about inputs, access and engineering review.
Differential pressure across four operating scenarios, bore/beta checks, maximum-flow velocity, capacity and preliminary plate-thickness checks. Gas adds permanent pressure loss, bore guidance and an explicit exceptional-dP approval setting.
Liquid and gas. Each has a dedicated Rev C method and its own inputs and status checks.
Yes. Unit selectors convert the displayed value while preserving the underlying quantity. Gas mass-flow conversion uses molecular weight and the stated standard-condition basis.
Subscribers can save personal or workspace calculations. Existing records remain readable after a subscription lapses.
Active subscribers can export PDF reports. Gas and liquid Excel calculation sheets are separate one-off purchases, accessible from Calculation spreadsheets. They contain their supplied sample cases, not your current website inputs.
Quick calculations and engineering resources are public. Detailed calculations, saving and PDF reports require an active subscription.
Engineering sign-off is required before design use. Results are not OEM-provided validated sizing results. Plate checks are preliminary screens, not independent buckling certification.
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