Spray Booth Airflow And Filter Maintenance Log
Daily / shift-level record of spray booth airflow velocity, differential pressure across filters, and visual inspections. Ensures compliance with NFPA 33, OSHA 1910.107, and local fire codes. Use this log to document pass/fail status and trigger corrective actions before coating defects or safety incidents occur.
This log captures critical airflow and filter integrity data for spray booths used in painting, coating, and finishing operations. Each row in the inspection matrix must be completed at the start of every shift or following booth idle periods exceeding 4 hours. Air velocity at the booth face shall be maintained at 100 ± 10 ft/min (0.51 ± 0.05 m/s) for crossdraft booths and 60–100 ft/min for downdraft designs. Filter differential pressure must not exceed the manufacturer’s recommended maximum (typically 2.0 in. w.g. for pre-filters and 1.5 in. w.g. for final HEPA filters). Exceedances trigger an immediate corrective action.
- Lockout/tagout of spray booth exhaust fan before any filter change or cleaning operation. Verify zero energy state.
- Wear appropriate PPE: safety glasses, nitrile gloves, and respirator if handling used filters. No open flames or spark-producing tools within 20 ft.
- Required instruments: calibrated hot-wire anemometer (±3% accuracy), Magnehelic or digital manometer (range 0–5 in. w.g.), LED flashlight, and booth manufacturer’s manual.
Inspection / Log Matrix
| Status (P/F) | Inspection Item / Task | Tolerance / Threshold | Actual Reading |
|---|---|---|---|
| [ ] Pass [ ] Fail | Exhaust fan operational and guard in place | Fan runs, no abnormal noise, interlock works | _________________ |
| [ ] Pass [ ] Fail | Booth face airflow velocity (crossdraft) | 100 ± 10 ft/min | ________ ft/min |
| [ ] Pass [ ] Fail | Downdraft booth airflow (if applicable) | 60–100 ft/min at floor | ________ ft/min |
| [ ] Pass [ ] Fail | Pre-filter differential pressure (first stage) | ≤ 2.0 in. w.g. (replace at 1.8) | ________ in. w.g. |
| [ ] Pass [ ] Fail | HEPA final filter differential pressure | ≤ 1.5 in. w.g. | ________ in. w.g. |
| [ ] Pass [ ] Fail | Booth walls, floor, and ceiling integrity | No holes, tears, or gaps > 1/8 in. | Comments: __________ |
| [ ] Pass [ ] Fail | Lighting fixtures functional and sealed | All lamps illuminate, no cracked lenses | _________________ |
| [ ] Pass [ ] Fail | Fire suppression system pressure gauge | Needle within green zone (125–175 psi) | ________ psi |
| [ ] Pass [ ] Fail | Explosion-proof electrical and bonding | All covers tight, ground strap intact | _________________ |
Defect / Corrective Action Log
| Date / Time | Item # | Issue Identified | Corrective Action Taken | WO # |
|---|---|---|---|---|
| ___/___/_____ | _______ | _______________________________ | _______________________________ | _______ |
| ___/___/_____ | _______ | _______________________________ | _______________________________ | _______ |
| ___/___/_____ | _______ | _______________________________ | _______________________________ | _______ |
By signing below, the inspector verifies that all items have been checked according to the manufacturer's specifications and facility safety standards. Any failures recorded in the Inspection Matrix have been transferred to the Corrective Action Log.