Observed arrival · 2026-10-29
Gas Pipe Sizing Calculator: assumptions in the open
A browser calculator estimates fuel-gas pipe capacity using the NFPA 54 / IFGC 402.4 low-pressure equation, with inputs for gas, pipe material, run length, pressure drop, and connected appliances.
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✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Gas installers and permit preparers
- Worth noticing
- It refuses pressure drops above 1.5 psi, excludes CSST, and warns that local code amendments may differ.
Field notes
Inputs include gas heating value, pipe material, equivalent length, allowable pressure drop, and the appliances served; users can select typical appliance loads or enter another one. The page says it displays capacities for rejected pipe sizes as well as the assumptions behind the answer. Its scope is explicitly limited: it excludes CSST and refuses pressure drops above 1.5 psi rather than extrapolating.
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
$PaidCommerce or pricing visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
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