# Flange Bolt Size & Torque — Size & Torque Patterns

> Offline reference for flange, pipe, and bolt data, including torque patterns. (iPhone/iPad app by Open Source Consulting LLC.)

- Source: https://appshunter.io/ios/app/flange-bolt-size-and-torque/id1489122965 (this page in markdown: same URL + `.md`)
- Developer: [Open Source Consulting LLC](https://appshunter.io/developer/1222335487)
- Category: Reference, Utilities
- Price: Free with in-app purchases
- Rating: 4.60/5 from 363 App Store ratings · 44 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.1 · 31 MB
- Languages: American English
- Released: 2019-11-25
- Data updated: 2026-08-05
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/flange-bolt-size-and-torque/id1489122965/reviews.md

## What is Flange Bolt Size & Torque?

Lookup flange, pipe, and bolt data in seconds with Flange Bolt Chart.

All data is available offline, lookups are instantaneous. 

Here's just a sample of the available data.

Flange bolting data:
1. Number of bolts
2. Diameter of bolts
3. Length of bolts
4. Wrench size
5. Torque pattern
6. Target torque

Flange dimensions data:
1. Outside diameter of flange
2. Flange thickness
3. Diameter of bolt circle
4. Flange weight

Pipe data:
1. Outside diameter
2. Wall thickness
3. Schedule
4. Weight
5. Weight with liquid

Gasket data:
1. Gasket inside diameter
2. Gasket outside diameter
3. Spiral wound dimensions
4. Type R ring dimensions

And many more fields.

All values are calculated or sourced directly from official standards like ASME B16.5 "Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard".

Looking up flange, pipe, and bolt data with Flange Bolt Chart is far faster and less error prone than searching through PDF charts and tables. The sole purpose of the tool is to make it as simple as possible for pipefitters, steamfitters, and others working in piping to look up piping information like flange bolt size and torque pattern.

Is there a feature you'd like from Flange Bolt Chart that you don't see? Request it through the app and we'll do our best to add it to the development schedule.

Features of the app:
1. Full offline capability: No internet connection necessary to use. All data is stored locally on your phone. (The app requires minimum storage space overall)

2. Instant data lookups. Just enter the necessary inputs (like nominal pipe size and flange class) and the app instantly populates the correct values for the flange, pipe, or bolt outputs you’re searching for.

3. Flange torque sequence images: Includes the full list of torque sequences in picture form, with the studs numbered.

The information in this app covers, but is not limited to:

(1) flanges with rating class designations 150, 300, 400, 600, 900, and 1500 in sizes NPS 1/2 through NPS 60 and flanges with rating class designation 2500 in sizes NPS 1/2 through NPS 12, with requirements given in U.S. Customary units with diameter of bolts and flange bolt holes expressed in inch units;

(2) flanged fittings with rating class designation 150 and 300 in sizes NPS 1/2 through NPS 60, with requirements given in U.S. Customary units with diameter of bolts and flange bolt holes expressed in inch units;

(3) flanged fittings with rating class designation 400, 600, 900, and 1500 in sizes NPS 1/2 through NPS 60 and flanged fittings with rating class designation 2500 in sizes NPS 1/2 through NPS 12  in U.S. Customary units.

Covers 4 bolt to 60 bolt sequences.

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Key features

- Offline data access
- Instant data lookups
- Flange bolting data
- Flange dimensions data
- Pipe data
- Gasket data
- Torque pattern images

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Flange Bolt Professional | $4.99 | per 3 months |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Suggested Torque | $0.99 | one-time |


## What do users think of Flange Bolt Size & Torque?

Overall sentiment: mixed

**Pros**

- 👍 Easy to use
- 🚀 Huge time saver
- ✅ Reliable data
- 🛠️ Very helpful tool
- 💡 Useful for trade/craft
- 💯 Great for flanges, studs, and specs
- 👍 No fluff, just enough info
- ✨ Clean and easy to use
- 💯 Excellent resource for piping
- 👍 Easy to use, very useful

**Cons**

- 💸 Now charges for features
- 👎 Used to be better
- 📉 Functionality decreased after redesign
- ❌ Missing Code 61/62 flange info
- 💰 Subscription model disliked
- 🤷 Can find info for free elsewhere
- 🗑️ App is trash
- 🚫 App no longer works after update
- ⚫ Black screen issue
- 📏 Max flange size limited

**Commonly reported bugs**

- App stopped working, requires resubscription
- App will not open after latest update
- App is broken
- Black screen and grey bar in the middle
- Wrench sizes don't match up on some flanges
- Torque patterns on some flanges are off

**Most requested features**

- Add Code 61/62 flange information
- Include machined bolt sizes
- Add torquing equipment info (rad guns, J gun, etc.) and usage instructions
- Include CGI and CG torque specs for different gasket styles
- Add support for larger flange sizes (beyond 60")
- Add RTJ selection
- Availability on Windows tablet

## Recent user reviews (10 of 44)

All indexed reviews: https://appshunter.io/ios/app/flange-bolt-size-and-torque/id1489122965/reviews.md

### 1/5 — None

*2026-05-28, version 18.26*

Does not include stud length

### 5/5 — My opinion

*2025-10-21, version 18.21*

It really helps

### 5/5 — Fieldwork

*2025-09-26, version 18.20*

I love this app it helps me a lot.    Thank you

### 5/5 — Fantastic

*2025-09-19, version 18.20*

Great work. Easy to use.

### 1/5 — Used to be good

*2025-07-01, version 18.18*

This app was way better before they redone it to what it is now. It used to give stud lengths for flange connections now it wants to say more input required. It’s still handy to an extent but the whole stud length is a joke now

### 5/5 — Available for windows

*2025-05-05, version 18.18*

I have it on my phone need it on my windows tablet is it available??

### 5/5 — Great App

*2024-10-31, version 18.17*

I use this app at least once a week. Very good accurate data. The one thing lacking is information on Code 61/62 flanges. I have to use a different app for that.

### 5/5 — P/F

*2024-10-16*

Great app very helpful.

### 1/5 — Perfect until….

*2024-10-01, version 18.17*

App was perfect until they recently charge you to look up things on it. I was singing this apps praises to the guys and actually working toward getting it suggested for us to download as a requirement at work. I would’ve paid a flat price to buy the app but I’m not paying every month for this. I can check my handy book for this info easily. Uninstalling the app now.

### 5/5 — Very good app

*2024-08-29, version 18.17*

Comes in handy when you need it

## Frequently asked questions about Flange Bolt Size & Torque

### What does the Flange Bolt Size & Torque app do?

This app provides instant, offline access to a comprehensive database of flange, pipe, and bolt data. It allows users to quickly look up information such as the number and diameter of bolts, wrench size, torque patterns, flange dimensions, pipe specifications, and gasket data.

### What kind of data can I find in the app?

The app includes detailed data for flanges (number of bolts, bolt diameter, length, wrench size, torque pattern, target torque, outside diameter, thickness, bolt circle diameter, weight), pipes (outside diameter, wall thickness, schedule, weight), and gaskets (inside/outside diameter, spiral wound dimensions, ring dimensions). It covers various flange rating classes and sizes.

### Is the app free to use?

The app is free to download and use, offering offline access to its extensive data. Based on the provided information, it operates on a 'free with in-app purchases' model, suggesting that some features or expanded content might be available for purchase.

### What are the main benefits of using this app?

The primary benefits are its full offline capability, meaning no internet connection is required, and its instant data lookups, which are significantly faster and less error-prone than manually searching through PDF charts and tables. It also includes visual aids like torque sequence images.

### Who is the target audience for this app?

The app is specifically designed for pipefitters, steamfitters, and other professionals working in the piping industry. It aims to simplify the process of looking up essential piping information, making their jobs more efficient.

## Version history (last 5 releases)

### 18.26 — 2026-03-25

Performance improvements

### 18.25 — 2026-03-03

Performance improvements

### 18.24 — 2026-02-28

Performance improvements

### 18.23 — 2026-02-21

New custom bolt length calculator

### 18.22 — 2026-02-13

New Custom Views feature

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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 2026-08-05.*