FlangeTorq: Flange Bolt Torque
ASME PCC-1 · B7 · Spiral Wound
$9.99 · Designed for iPad. Not verified for macOS.
Built for pipefitters, mechanical contractors, and plant maintenance who need ASME PCC-1 flange bolt torque on the iron - not a dashboard you log into.
WHAT IT DOES
Computes flange bolt torque per the ASME PCC-1 4-pass tightening sequence, with bolt load, bolt stress, and the gasket factor / seating stress that drives the calculation. Pulls flange dimensions from ASME B16.5, tensile stress area from ASME B1.1, and bolt-material proof strength from A193 / A320.
INPUTS
- Flange size: 1" to 24"
- Pressure class: 150, 300, 600, 900, 1500
- Gasket type: Spiral Wound, Ring Joint, Flat Non-Asbestos
- Bolt material: B7, B7M, L7, B8 Cl.2 (per A193 / A320)
- Lubricant: Dry, Moly, Anti-Seize, PTFE
- Target bolt stress: 20-80% of yield (slider)
RETURNS
- Torque per bolt in ft-lbs and N·m
- Bolt load per bolt and total assembly load (lb)
- Bolt stress at the selected yield percentage (psi)
- Effective nut factor K
- ASME PCC-1 4-pass tightening sequence: 30%, 60%, 100%, plus a circular check pass
STANDARDS REFERENCED
- ASME PCC-1 - gasket factor, seating stress, tightening pattern
- ASME B16.5 - flange dimensions and bolt count
- ASME B1.1 - tensile stress area
- A193 / A320 - B7, B7M, L7, B8 Cl.2 bolt material specs
WHY THIS APP, NOT THE FREE ONES
- Math is shown - formula and substitution visible for every result. No black box.
- Standards cited - ASME PCC-1, B16.5, B1.1. Inspector-defensible.
- Works offline - refinery turnarounds, plant outages, field digs. Always available.
- No login. No ads. No telemetry. No subscription.
PRICING
$4.99. Pay once, own it. Lifetime access on iPhone, iPad, and Mac via Family Sharing.
NOT A SUBSTITUTE FOR
Project-specific bolt-up procedures. Calibrated torque wrench certificates. ASME PCC-1 elastic interaction passes for tight-fit assemblies. Always cross-reference the engineer-stamped tightening sequence on file.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Optimized for iPhone Duo and iPad: on wide screens, inputs and results now sit side by side so you can see the answer change as you type. Built with the iOS 27 SDK.
The developer, Shanghai Sheyuan Network Technology Co., Ltd., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Shanghai Sheyuan Network Technology Co., Ltd.
- Size
- 1.2 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Sheyuan Inc.
