Boiler Room Safety Audit Bottom Blowdown Log Sheet
Mandatory daily audit log for bottom blowdown procedures on steam boilers. Each shift must perform a timed blowdown, verify valve operation, check water level, and record all readings. Non-complaint items must be escalated immediately.
This log documents the daily bottom blowdown safety audit required by ASME CSD-1 and local boiler codes. Each shift operator must open and close the quick-opening and slow-opening blowdown valves in sequence, verify full drainage, record blowdown duration, check water level recovery, inspect for leaks, and confirm all valves are fully closed. Any deviation must be documented and corrective action initiated. Maintaining this log reduces risk of sediment buildup, water carryover, and catastrophic valve failure.
- Verify boiler is not under pressure above 15 psi. Lockout burner if blowdown is performed offline.
- Thermal gloves, safety glasses, hearing protection, and steel-toed boots required during blowdown operation.
- Ensure blowdown line is clear and discharge to safe area (drain or blowdown tank). No personnel within 3 metres.
Inspection / Log Matrix
| Status (P/F) | Inspection Item / Task | Tolerance / Threshold | Actual Reading |
|---|---|---|---|
| [ ] Pass [ ] Fail | Open quick-opening valve fully, then slowly open slow-opening valve. | Valve must open smoothly – no resistance or chatter | _________________ |
| [ ] Pass [ ] Fail | Blowdown duration (from first opening to full drainage sound change) | 10–20 seconds for a 200 HP boiler; adjust per manufacturer | _____ seconds |
| [ ] Pass [ ] Fail | Close slow-opening valve first, then quick-opening valve. | Valves seat fully – no drip or leak after closure | _________________ |
| [ ] Pass [ ] Fail | Monitor water level recovery in gauge glass | Recover to normal water line within 2 minutes | _____ minutes |
| [ ] Pass [ ] Fail | Inspect blowdown piping and valves for leakage | Zero visible steam or water leak | _________________ |
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.