# Orifice Flow

> Industrial fluid flow rate calculator for pipes using orifice plates. (iPhone/iPad app by Kaup Shenoy Associates.)

- Source: https://appshunter.io/ios/app/orifice-flow/id479581349 (this page in markdown: same URL + `.md`)
- Developer: [Kaup Shenoy Associates](https://appshunter.io/developer/460148822)
- Category: Utilities, Reference
- Price: $3.99
- Rating: 4.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.3 · 1 MB
- Languages: American English
- Released: 2011-11-15
- Data updated: 2026-08-27
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/orifice-flow/id479581349/reviews.md

## What is Orifice Flow?

Measurement of fluid flow in pipes and conduits using orifice plates are very common in industrial applications.  This app quickly computes the flow rates for liquid and gases based on standard parameters as per the model shown. Users can pick any fluid from a list of fifteen most common fluids used in industrial applications. Therefore, this app can be a very helpful tool for practicing engineers and designers in design and analysis of flows in different applications.  

A case study on CO2 flow rate is shown in the screen shot.  The result is consistent with other methods used by the industry in computation and difference is less than 0.1%.   Fluids that are not in the list, users can create a custom fluid with property data and compute the flow rate using the model provided in this app.  Custom fluid data can be saved and reloaded every time when custom fluid is selected.    

Fluids:
Air, Steam, Water, Nitrogen, Oxygen, Hydrogen, Helium, CO2, Methane, Ethane, Chlorine, Ammonia, Argon, Hydraulic oil, HFC(R410A), Custom (user's choice).

Orifice Type:
App gives four different standard orifice design with recommended discharge coefficients as shown in the following screen shot.   It also provides the details of the model used in the computation of flow rates for liquid and gases.  This model is valid even for nozzles, venturi-flow meters for which the discharge coefficient (Cd) is unity. 

Measuring Parameters:
Fluid inlet temperature and pressure, orifice geometry, pressure differential using standard pressure taps (ISO 5167), are the standard parameters required in the computation.  Based on the orifice geometry, recommended discharge coefficient Cd is used.  However, users can edit this using manufacturer’s data for more accurate results.   App notes provides brief description of different orifice parameters for quick reference.

Unit of Measurement:
Users can choose different unit of measurement for both flow as well as pressure drop under given unit standard (SI or USCS).  This can be conveniently selected while choosing the fluid from the picker list.
App notes provides additional guideline with a link for complete documentation on implementation and validation of math-models used with industry examples.

## Key features

- Fluid flow rate computation
- Supports 15 common industrial fluids
- Custom fluid property input and saving
- Multiple orifice plate types
- Adjustable units (SI/USCS)
- Detailed computation model documentation

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/orifice-flow/id479581349/reviews.md

### 4/5 — Great quick reference

*2011-11-27*

I would like to see a way to save custom fluids in next update.

## Frequently asked questions about Orifice Flow

### What is Orifice Flow used for?

Orifice Flow is used to quickly compute the flow rates of liquids and gases in pipes and conduits using orifice plates, a common method in industrial applications. It helps engineers and designers in analyzing and designing fluid flow systems.

### What fluids does Orifice Flow support?

Orifice Flow supports fifteen of the most common industrial fluids, including Air, Steam, Water, Nitrogen, Oxygen, Hydrogen, Helium, CO2, Methane, Ethane, Chlorine, Ammonia, Argon, Hydraulic oil, and HFC(R410A). It also allows users to create and save custom fluid properties.

### Can I use Orifice Flow for custom fluids?

Yes, Orifice Flow allows users to create custom fluid profiles by inputting their specific property data. These custom fluids can be saved for future use, making the app versatile for unique industrial needs.

### What orifice types are supported by Orifice Flow?

Orifice Flow supports four different standard orifice designs, providing recommended discharge coefficients. The app's model is also valid for nozzles and venturi-flow meters where the discharge coefficient is unity.

### Does Orifice Flow support different units of measurement?

Yes, users can choose between SI and USCS unit standards for both flow rate and pressure drop measurements. This flexibility ensures compatibility with various international and regional engineering practices.

### How accurate is Orifice Flow?

The app's results are consistent with industry-standard methods, with differences typically less than 0.1% as demonstrated in a case study. Users can also edit the discharge coefficient using manufacturer's data for enhanced accuracy.

### What devices is Orifice Flow available on?

Orifice Flow is available for iPhone and iPod devices. It was last updated on April 29, 2025, with version 2.2.

### What is the price of Orifice Flow?

Orifice Flow is a paid application priced at $3.99. There are no in-app purchases or advertisements associated with this utility.

## Version history (last 5 releases)

### 2.2 — 2025-04-29

Updated for iOS 18 devices.

### 2.1 — 2024-04-25

Updated for iOS 17 (iPhone15..)devices.

### 2.0 — 2023-05-09

Mandatory update for iOS 16.

### 1.9 — 2021-03-08

Updated iOS14.4 and app notes with a link to additional documentation on implementation and validation of math-models with examples.

### 1.8 — 2020-10-25

Updated for iOS 14 devices.

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All apps by Kaup Shenoy Associates: https://appshunter.io/developer/460148822

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*