Gas Regulator Station Inspection Logger
District regulator station walkdown — pressures, relief stacks, vents, vegetation, security and atmosphere checks; offline-first with GPS.
New regulator station inspection
49 CFR 192.739: each regulator station inspected & tested at least once per calendar year (not exceeding 15 months).
Field guide: Gas Regulator Station Inspection Logger
A district regulator station is the pressure cliff between transmission-fed mains and the 2-psig world of household appliances — and its failure modes are asymmetric: fail-open without working relief is how neighborhoods get overpressurized (the Merrimack Valley disaster made the stakes vivid), while a blocked relief stack or a wasp-nested vent screen quietly disables the very protection layer. This logger walks the station in that order: pressures against setpoint, atmosphere with a combustible-gas indicator, relief and vent integrity, then equipment and site.
Vent findings carry warnings because they're the silent ones — a relief that's weeping is announcing a regulator problem upstream, and a vent line aimed at a building opening converts a routine relief event into an evacuation. The annual 192.739 inspection needs records; per-station GPS-pinned entries with pressure readings and CGI results are precisely that record.
Field tips
- Soap-test fittings whenever the CGI shows anything at all — 'trace' findings have sources, and sources grow.
- Look UP at the relief stack: screens, nests, and painter's tape from last month's coating job all live at the top.
- Compare outlet pressure at the gauge against SCADA/recorded values; a station lying to telemetry is an operational concern by itself.
Records are stored only in this browser (localStorage) — export regularly. This tool aids field documentation; it does not replace your agency's official inspection procedures or engineering judgment.
Gas Regulator Station Inspection Logger — District regulator station walkdown — pressures, relief stacks, vents, vegetation, security and atmosphere checks; offline-first with GPS. Free, offline-first and GPS-aware: open it on any phone, log in seconds, and hand your GIS team clean GeoJSON.
About Gas Regulator Station Inspection Logger
A district regulator station is the pressure cliff between transmission-fed mains and the 2-psig world of household appliances — and its failure modes are asymmetric: fail-open without working relief is how neighborhoods get overpressurized (the Merrimack Valley disaster made the stakes vivid), while a blocked relief stack or a wasp-nested vent screen quietly disables the very protection layer. This logger walks the station in that order: pressures against setpoint, atmosphere with a combustible-gas indicator, relief and vent integrity, then equipment and site.
How to use Gas Regulator Station Inspection Logger
- 1Enter the station id and tap 📍 GPS to pin the regulator station's exact location (or type coordinates).
- 2Work through the regulator station checklist — every field matches what a real inspection program records.
- 3Pick a condition on the Normal / Maintenance item / Operational concern / Gas detected / urgent ⚠ scale; actionable findings are tallied automatically.
- 4Add notes and log the inspection — it saves instantly to your device, even with zero signal.
- 5Export the round as CSV for your asset system, GeoJSON for the GIS, or print a clean report.
Why use Gas Regulator Station Inspection Logger?
- ✓100% free, no sign-up — built for crews, not per-seat licences
- ✓Offline-first: records save to your device instantly and survive dead zones
- ✓One-tap GPS tagging with accuracy capture on every record
- ✓Exports CSV for asset systems, GeoJSON for GIS, and print-ready reports
- ✓Checklist and guidance aligned with 49 CFR 192.739/743
Frequently asked questions
What does 49 CFR 192.739 require annually?+
Each pressure-regulating station and its equipment must be inspected and tested at least once each calendar year (≤15-month interval) to verify it's in good mechanical condition, adequate for capacity, set correctly, and that overpressure protection will function. This field log documents the inspection half; relief set-point testing rides with qualified techs.
Why is overpressure protection layered?+
Because a single regulator failing open puts inlet pressure onto a system rated for ounces. Stations layer worker/monitor regulators, relief valves sized for full failure flow, and sometimes slam-shut devices. Every layer is invisible in normal operation — inspection is the only time anyone confirms the layers still exist and can act.
What's the significance of a weeping relief valve?+
Relief passing gas at normal outlet pressure means either the relief is set/failing low or the regulator is creeping above setpoint — both are operational findings. It's also a continuous methane release at a station, with odor-complaint and emissions implications. Log it with both pressure readings; the pair tells the technician which component to suspect.
What should a CGI sweep cover at a station?+
Breathing-zone and ground-level sweeps around regulators, valves, flanges and especially inside vaults before any entry (vaults concentrate leaks), plus vent terminations. Sustained LEL readings in a vault are an urgent finding — ventilate, don't enter, escalate per procedure. The log's atmosphere field keeps the result attached to the visit.
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