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Skilled trades updates

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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.

 

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