Intry Verified receipt
Is the Intry Gas Pipe Sizing Calculator accurate?
The provenance receipt for the Intry Gas Pipe Sizing Calculator: the exact authority its values derive from, the edition they are keyed to, who has final say, and what our automated checks hold them against, rebuilt from their cited source.
The receipt
- Calculated from
- Chapter 4 of the fuel gas code, which is MANDATORY: the sizing equation, the Cr and Y values, and the three length methods · The published capacity tables, used as a floor under every steel, copper and polyethylene answer at the drop the table is printed for and at any tighter drop, and as the equation's validation set · Copper and polyethylene bores, and CSST capacities, read from the code's own tables · Section 402.6 of the fuel gas code, the pressure at each appliance inlet · The appendix's own worked examples, used as an independent check · Appendix A, which says in its own first line that it is INFORMATIVE and not part of the code. Reused verbatim from the locked engine, never re-written for this page. The documents it rests on are listed in the source receipt on the tool page.
- Edition
- no single edition: the fuel gas code family (IFGC, IRC, NFPA 54 or UPC) is chosen on the page and each is cited by its own address
- Checked
- Before any release, an automated check runs the locked engine that produces these figures and holds its answers against values written from the source it cites, so a checked number answers to its source and not merely to itself. The check covers the cases someone wrote a check for, not every input the tool accepts: it tells you where a number comes from, and it is not a proof of every value. As of the current build that suite holds 30696 checks, and this page has to clear them too. This is our own deterministic gate, not a third-party audit.
- Runnable
- A reference engine behind the published numbers on this site. Runnable access is offered on the calculators exposed at the Intry MCP endpoint.
- Final say
- The authority having jurisdiction and the appliance manufacturer's instructions have final say. This computes the code-required size and never certifies an installation: a real problem is confirmed by a manometer reading at the appliance inlet under full load.
Frequently Asked Questions
Is the Intry Gas Pipe Sizing Calculator accurate?
It computes from the sources listed in the source receipt on its tool page, and our automated checks hold its answers against values written from those sources for the cases the checks cover, not for every input you can enter. The authority having jurisdiction and the appliance manufacturer's instructions have final say. This computes the code-required size and never certifies an installation: a real problem is confirmed by a manometer reading at the appliance inlet under full load. Every figure an Intry calculator computes comes from a locked source module, not hand-typed. 30696 automated checks, one suite for the whole site rather than a per-tool count, re-derive the numbers before each deploy from the tables this site transcribed from the fuel gas code Chapter 4 capacity tables and the sizing equation with the Cr values it prints, the larger of the two, or for CSST the code's own CSST tables, which it was read from. This is our own deterministic gate, not a third-party audit. The per-tool receipt is public at https://www.intrysys.com/verified.