Explosion inside steam boiler and vent stack in industrial bakery
Incident Investigation
Explosion inside steam boiler and vent stack in industrial bakery
October 23, 2019
Boiler, PV and Refrigeration
Gas
Reference Number:
II-927063-2019 (#15727)
Location: Delta
Regulated industry sectors:
- Gas - Natural gas system
-
Boilers, PV & Refrigeration - Boiler and pressure vessel system
Incident overview
An explosion occurred inside a steam boiler and vent stack in the mechanical room of a large industrial bakery. Evidence showed required routine maintenance procedures were skipped. The skipped maintenance procedures resulted in an excessive spark gap, which contributed to an unstable pilot flame, allowing unburnt gas to accumulate, causing the explosion.