Presentation is loading. Please wait.

Presentation is loading. Please wait.

Fatal Incident Involving a Temporary Enclosure at a Chemical Facility From an OSHA Technical Information Bulletin.

Similar presentations


Presentation on theme: "Fatal Incident Involving a Temporary Enclosure at a Chemical Facility From an OSHA Technical Information Bulletin."— Presentation transcript:

1 Fatal Incident Involving a Temporary Enclosure at a Chemical Facility From an OSHA Technical Information Bulletin

2 Purpose  Provide information  Hazard alert  Requirements and regulations  Recommendations and guidance  Other information

3 Incident Description  Facility unit undergoing a turnaround.  2 workers to inspect the flange surfaces of an open 48-inch piping system.  Piping system opened to remove a piece of process equipment for cleaning.

4 Black Tarp 48” Pipe

5 Incident Description  Plastic-wrapped pipe  New moisture-sensitive catalyst upstream

6 Incident Overview N 2 Injection Reactor w/new catalyst Open 48" Piping Open Valve Closed Valve N 2 Venting Note: Actual process/piping significantly more complex. N 2 injection point 150' and several stories in elevation from pipe opening. North South

7 Incident Overview Nitrogen Purge Reactor with Catalyst Open valves to north side open piping In-Line Mixer (removed) Black Tarp

8 Incident Description  Southside open pipe & enclosure  Midday black light inspection.  Black tarps draped to block light.  Workers entered enclosure.  No problems with inspection.

9 Incident Description  North side open pipe & enclosure  Midday backlight inspection.  Black tarps draped to block light.  Workers entered enclosure.  Workers overcome upon entering.

10 Incident Conclusions  One worker died, another hospitalized.  N 2 throughout system.  Piping system was not straightforward.  OSHA cited the employer for Permit-Required Confined Space violations.

11 Permit Required Confined Space Hazards  Oxygen deficiency  Flammable atmosphere  Toxic atmosphere  Oxygen enrichment  Chemical exposure  Thermal hazards  Electrical shock  Temperature extremes  Engulfment  Mechanical hazards  Trapping/Pinch points  Physical hazards  Slips, Trips, Falls  Unstable working surface  Structural failure  Other recognized hazards

12 Nitrogen Hazard  Can’t be detected by human senses  N 2 displaces oxygen in enclosures (confined spaces) resulting in oxygen- deficient atmospheres

13 Human Response to Oxygen- Deficient Atmospheres Atmospheric Oxygen Concentration [%O 2 ] Possible Consequences 19.5 Meets OSHA minimum requirements for worker protection 8-10 Unconsciousness without warning; so quickly that individuals cannot help or protect themselves 6-8Fatal injury < 6 minutes 4-6Coma < 40 seconds with subsequent death

14 Requirements, Recommendations & Guidance  If space meets the definition of a PRCS, must follow  Even if not technically a PRCS, recommended.  Other OSHA standards may apply:  – Respiratory Protection  IDLH Atmospheres  Recognition that temporary enclosures may be PRCSs.

15 Requirements, Recommendations, & Guidance  Comprehensive confined space training.  Particular attention on hazardous atmospheres

16 Related Information  OSHA Technical Information Bulletin on incident at:  CSB Morten Report at: e/98005lafr.htm  OSHA PRCS Standard, Directive and Interpretation at:


Download ppt "Fatal Incident Involving a Temporary Enclosure at a Chemical Facility From an OSHA Technical Information Bulletin."

Similar presentations


Ads by Google