# Fluid Pressure Drop

> Industrial fluid pressure loss calculator for engineers and designers. (iPhone/iPad app by Muralidhar Shenoy.)

- Source: https://appshunter.io/ios/app/fluid-pressure-drop/id467174085 (this page in markdown: same URL + `.md`)
- Developer: [Muralidhar Shenoy](https://appshunter.io/developer/460148822)
- Category: Utilities, Reference
- Price: $4.99
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 14.3 · 1 MB
- Languages: English
- Released: 2011-09-30
- Data updated: 2026-06-24
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/fluid-pressure-drop/id467174085/reviews.md

## What is Fluid Pressure Drop?

This app computes energy loss involved in transmission of fluids for industrial applications.   Users can pick from a list of fifteen most common fluids, pipe schedules and sizes with different material of construction to determine overall pressure loss.  A judicious selection of pipe size is often a trade off between initial cost and subsequent energy cost involved in transmission of fluid from one point to another. Therefore, the app can be a helpful tool for practicing engineers and designers in analyzing different matrix.  

In addition, fluids that are not in the list, users can create a custom fluid with property data that can be saved and compute the pressure loss using the model provided in this app.  Pressure loss is computed using Darcy’s equation, which gives a good estimate for both liquid and gases.  For gases, the method is valid if the fluid velocity is within 40% of its sonic velocity.  Also this app provides result of different flow parameters used in the computation of pressure loss.

Section has been added for computation of pressure losses in valves and fittings.  Users can choose any generic valve or fitting from the list provided in this app that are commonly used in industries.

List of fluids:
Air, Steam, Water, Nitrogen, Oxygen, Hydrogen, Helium, CO2, Methane, Ethane, Chlorine, Ammonia, Argon, Hydraulic oil, HFC (R410A), Custom (user's choice gas or liquid).

Pipe Schedules:
10, 20, 30, 40, 60, 80, 100, 120, 140, 160.
Users can pick applicable sizes under nominal diameter for which app provides the corresponding inside and outside diameter.

Material of construction:
Steel, SS, GI, CI, Concrete, Copper, Aluminum, PVC, Glass, Wood, FRP, Rubber.
Based on the size, length and material of construction, the app gives the total weight of the pipe for trade-off analysis.

Valves and Fittings:
Globe valve, Gate valve, Ball valve, Butterfly valve, Angle valve, Check-valve, Check-angle, Check-lift.
Elbow, Reducer, Diffuser, T-couple, Bend-U, Bend-45, Bend-90.

Flow Parameters:
Fluid velocity, Reynolds number and pipe friction coefficient are computed as a function of pipe size, fluid density and viscosity.  App has its own algorithm to compute the coefficient of pipe friction based on roughness factor for the given material and Reynolds number under turbulent conditions.   For laminar flow, it is a function of Reynolds number and irrespective of pipe roughness.  For more accuracy users can edit the pipe roughness factor.  For gases, additional data on sonic velocity is provided for a quick reference and validity.

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 as shown in the screen shots.

## Key features

- Pressure loss computation
- Custom fluid creation
- Valve and fitting loss calculation
- Multiple fluid options
- Various pipe schedules and materials
- Unit of measurement selection


## Frequently asked questions about Fluid Pressure Drop

### What is Fluid Pressure Drop used for?

Fluid Pressure Drop is used to compute the energy loss involved in the transmission of fluids for industrial applications. It helps engineers analyze pressure loss in pipes, valves, and fittings.

### What fluids can Fluid Pressure Drop calculate pressure loss for?

Fluid Pressure Drop supports fifteen common fluids including Air, Steam, Water, and various gases and oils. It also allows users to create and save custom fluid properties.

### Does Fluid Pressure Drop support custom fluids?

Yes, users can create custom fluids by inputting their property data. This allows for pressure loss calculations for fluids not included in the pre-defined list.

### Can Fluid Pressure Drop calculate pressure losses in valves and fittings?

Yes, a dedicated section allows users to compute pressure losses in common industrial valves and fittings, such as globe valves, gate valves, elbows, and reducers.

### What pipe specifications can be used with Fluid Pressure Drop?

Users can select from fifteen pipe schedules (10-160) and various materials of construction like Steel, SS, PVC, and Concrete. The app provides corresponding inside and outside diameters based on nominal diameter.

### How does Fluid Pressure Drop handle different units of measurement?

The app allows users to choose different units of measurement for both flow and pressure drop. This selection can be made under the SI or USCS unit standards while choosing the fluid.

### What is the price of Fluid Pressure Drop?

Fluid Pressure Drop is a paid application, priced at $4.99. There are no in-app purchases or subscriptions required.

### How often is Fluid Pressure Drop updated?

The latest version, 2.3, was last updated on April 25, 2025. This indicates a developer actively maintaining and improving the application.

## Version history (last 5 releases)

### 2.3 — 2025-04-25

Updated for iOS 18 devices.

### 2.2 — 2024-04-25

Updated for iOS 17 (iPhone15..) devices.

### 2.1 — 2023-05-09

Mandatory update for iOS 16 devices.

### 2.0 — 2021-03-07

Updated iOS 14.4 and app notes providing link to additional documentation on implementation and validation of math-models.

### 1.9 — 2020-10-24

Updated for iOS 14 devices.

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| [Pressure Vessel Pro](https://appshunter.io/ios/app/pressure-vessel-pro/id535696875) | 5.0 (1) | $5.99 | Utilities |
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## More apps by Muralidhar Shenoy

- [Thermo Physical Prop](https://appshunter.io/ios/app/thermo-physical-prop/id460148819)
- [AstroPro](https://appshunter.io/ios/app/astropro/id476327822)
- [Orifice Flow](https://appshunter.io/ios/app/orifice-flow/id479581349)
- [Centrifugal Pump Spec](https://appshunter.io/ios/app/centrifugal-pump-spec/id482488028)
- [Boiler Efficiency](https://appshunter.io/ios/app/boiler-efficiency/id490506363)

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

## Related topics

[fluid pressure drop](https://appshunter.io/ios/topics/fluid-pressure-drop) · [pressure drop](https://appshunter.io/ios/topics/pressure-drop)

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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 2026-06-24.*