Gas Pipe Sizing Plumb

NFPA 54 Gas Sizer

$0.99 · In‑App Purchases · Designed for iPad. Not verified for macOS.

Gas Pipe Sizing Plumb - professional NEC calculator for electricians. Offline, permit-ready. Gas Pipe Sizing Calculator helps you size natural gas and propane piping systems per the printed NFPA 54 (National Fuel Gas Code) / IFGC sizing tables. Instantly determine correct pipe diameter for black iron, CSST (corrugated stainless steel tubing), and semirigid copper piping based on BTU demand, inlet pressure, and pipe run length. Works for low-pressure, 2-psi, and 5-psi natural gas systems and low-pressure and 2-psi propane systems. Perfect for plumbers, gas fitters, and HVAC technicians. Works 100% offline on the job site. FEATURES - Dual Gas Support: Natural gas and propane (LP) each use their own printed NFPA 54 / IFGC capacity tables - no approximation multipliers - 3 Pipe Materials: Black iron (Schedule 40), CSST (by EHD flow designation), and semirigid copper with material-specific printed tables - Inlet Pressure Classes: Low pressure (under 2 psi), 2 psi, and 5 psi for natural gas; low pressure (11" w.c.) and 2 psi for propane (the code has no printed 5-psi LP tables) - Pipe Diameters: Black iron 1/2" through 4"; copper and CSST 1/2" through 2" (CSST capacities per conservative EHD for each nominal) - 10 Length Brackets: Pipe runs from 10 feet to 200 feet, rounded up per code practice - BTU Input: Enter appliance or total system demand in BTU/h - Result Note: Shows the exact NFPA 54 / IFGC table used for every result HOW IT WORKS 1. Select gas type (natural gas or propane) 2. Enter inlet pressure (low pressure, 2 psi, or 5 psi) 3. Input total BTU demand from gas appliances 4. Enter pipe material (black iron, CSST, or copper Type L) 5. Enter longest pipe run distance 6. See recommended pipe diameter with NFPA 54 capacity verification PERFECT FOR - Plumbers installing natural gas and propane systems - Gas fitters and propane technicians - HVAC technicians sizing gas furnace piping - Plumbing contractors and estimators - Mechanical engineers designing gas systems - Plumbing inspectors verifying system compliance OPTIONAL PRO UPGRADE — $2.99 ONE-TIME IN-APP PURCHASE The following features require a separate one-time in-app purchase. They are not required to use the calculator: • Unlimited saved calculation history • PDF export of results • Dark theme • Ad-free experience STANDARDS & COMPLIANCE Capacities follow the printed NFPA 54 (National Fuel Gas Code) / IFGC Section 402.4 sizing tables: Schedule 40 steel (Tables 402.4(2)/(5)/(7) natural gas, 402.4(28)/(27) propane), semirigid copper (402.4(9)/(12)/(14) and 402.4(30)/(31)), and CSST by EHD (402.4(15)/(18)/(19) and 402.4(32)/(33)). Always confirm with your local code official and the tubing manufacturer table for CSST. PERFECT FOR - Plumbers and gas fitters - HVAC technicians and contractors - Propane technicians and installers - Plumbing contractors and estimators - Mechanical engineers - Code officials and inspectors OFFLINE & PRIVACY - Works 100% offline - no internet needed for calculations - No account required - instant access without signup - No data collection - all calculations stored locally - No tracking or cloud dependencies Part of PlumbTools Suite - professional plumbing and HVAC calculator tools. Size gas systems faster, eliminate sizing errors, and ensure full NFPA 54 code compliance with accurate gas pipe sizing calculations.

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What's new: - All capacities now follow the printed NFPA 54 / IFGC Section 402.4 tables - Separate natural gas and propane tables (the propane x2.52 multiplier is gone) - Corrected copper and CSST (by EHD) data; fixed 2 psi and 5 psi values - BTU/h demand is now compared correctly; the result shows the exact code table used

Version 1.0.5

The developer, Rizvan Adzhoian, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

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  • Data Not Linked to You

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Information

Seller
  • Rizvan Adzhoian
Size
  • 35 MB
Category
  • Utilities
Compatibility
Requires iOS 13.0 or later.
  • iPhone
    Requires iOS 13.0 or later.
  • iPad
    Requires iPadOS 13.0 or later.
  • iPod touch
    Requires iOS 13.0 or later.
  • Mac
    Requires macOS 11.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
  • English
Age Rating
18+
In-App Purchases
Yes
Copyright
  • © 2026 Rizvan Adzhoian
  • Developer Website
  • Privacy Policy

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