# EXPLODING VESSELS UNDER PRESSURE
> MSHA accident `220261380019` · 05/09/2026 · CalPortland
## Details
- **Degree of injury:** DAYS AWAY FROM WORK ONLY
- **Classification:** EXPLODING VESSELS UNDER PRESSURE
- **Accident type:** Struck by... NEC
- **Occupation:** Welder (non-shop)
- **Activity:** Machine maintenance
- **Injury source:** METAL COVERS & GUARDS
- **Nature of injury:** CUT,LACER,PUNCT-OPN WOUND
- **Body part:** FACE,NEC
- **Days lost:** —
- **Mine experience:** 3.85 years
## Operator
- **Controller:** Taiheiyo Cement Corp
- **Operator:** CalPortland
- **Mine:** [0400011](https://api.morvs.ai/mine/0400011)
## Narrative

Employees noticed the round door for the dust collector was not sealed.  Since they could not close the door properly, the control room was called to shut down the fan and close it properly.   An EE was standing in front of the dust collector door when the fan was shut down.  Immediately, positive air pressure built up and shot the door out, hitting the EE on the face.

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*Source: [MSHA Open Government Data](https://arlweb.msha.gov/OpenGovernmentData/) · MORVS · CC0 1.0*