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Run: Nitrogen Tire Inflation System Daily Audit

Daily audit checklist for nitrogen tire inflation systems that verifies purity, pressure, filtration, hoses, signage, and shutdown access before the equipmen...

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Audit Setup and Inspector Information

Record the exact date and time this audit is being conducted.
Full name and employee ID of the person conducting this audit.
Enter the equipment asset tag number and physical location (e.g., Bay 3, Service Lane A).
Confirm all deficiencies noted in the prior daily audit have been corrected or are actively tracked in the corrective action log.

Nitrogen Generator Purity and Output

Record the purity percentage displayed on the generator's purity analyzer or inline sensor. Minimum acceptable value is 95%. Values below 95% are a critical non-conformance — remove unit from service immediately.
Confirm the purity display is active, not showing an error code, and has been calibrated within the manufacturer-specified interval.
Record the output pressure shown on the generator gauge. Acceptable range is typically 100–150 psi; verify against your unit's nameplate rating.
Confirm the unit is powered on, no fault or alarm LEDs are illuminated, and the unit is in ready/standby or active state.

Compressed Air Supply and Filtration

Record the inlet air pressure. Most PSA/membrane generators require 90–120 psi feed air. Consult unit nameplate for exact specification.
Inspect the coalescing pre-filter sight glass or drain bowl. Presence of liquid water or oil indicates filter saturation — replace element before continuing operation.
Manually trigger the auto-drain test button (if present) and confirm condensate is expelled. A non-functioning drain can saturate the filter and degrade purity.
Check the desiccant dryer moisture indicator (if equipped). A pink or red indicator means the desiccant is saturated and must be regenerated or replaced.

Hoses, Fittings, and Inflation Equipment

Visually inspect each inflation hose from the generator outlet to the chuck end. Any cut exposing inner braid, bulge, or severe kink is a critical deficiency — remove hose from service.
Connect the chuck to a capped test valve stem and listen/feel for leakage. A leaking chuck results in inaccurate inflation and nitrogen waste.
Inspect all quick-connect couplings. Missing retaining clips can cause uncontrolled hose separation under pressure (OSHA 29 CFR 1910.169 whip hazard).
Compare the inflation gauge reading against a calibrated reference gauge at a known pressure. Gauges out of tolerance by more than ±2 psi must be recalibrated or replaced.

Safety, Signage, and Work Area Compliance

OSHA 29 CFR 1910.145 requires hazard warning signs where oxygen-displacing gases are used. Confirm signage is legible, undamaged, and visible from the approach direction.
Nitrogen is an asphyxiant (OSHA 29 CFR 1910.146 permit-required confined space considerations). Confirm the generator is not operating in a sealed room without ventilation.
Per NFPA 1, compressed gas equipment areas must be kept free of flammable/combustible materials. Inspect a 3-foot radius around the unit.
Confirm the main nitrogen supply shutoff valve is clearly labeled, reachable within 10 seconds, and not blocked by equipment or materials.

Deficiencies, Corrective Actions, and Sign-Off

Enter the count of all non-conformances noted. Enter 0 if none.
For each deficiency: state the item, describe the non-conformance, identify the responsible person, and set a target resolution date. Example: 'Pre-filter sight glass shows oil — filter element replaced by J. Smith, 2024-06-10.'
Select the operational status of the nitrogen inflation system following this audit.
By signing, the inspector certifies that all items above were physically verified and that all findings are accurately recorded.

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