1 / 15

Fatal Incident Involving a Temporary Enclosure at a Chemical Facility

Fatal Incident Involving a Temporary Enclosure at a Chemical Facility. From an OSHA Technical Information Bulletin. Purpose. Provide information Hazard alert Requirements and regulations Recommendations and guidance Other information. Incident Description.

shika
Télécharger la présentation

Fatal Incident Involving a Temporary Enclosure at a Chemical Facility

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

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. Incident Description • Plastic-wrapped pipe • New moisture-sensitive catalyst upstream

  5. North Open Valve N 2 Injection Open 48" Piping N Venting 2 Closed Valve South Reactor w/new catalyst Note: Actual process/piping significantly more complex. N2 injection point 150' and several stories in elevation from pipe opening. Incident Overview

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

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

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

  9. Incident Conclusions • One worker died, another hospitalized. • N2 throughout system. • Piping system was not straightforward. • OSHA cited the employer for 1910.146 Permit-Required Confined Space violations.

  10. 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 Permit RequiredConfined Space Hazards

  11. Nitrogen Hazard • Can’t be detected by human senses • N2 displaces oxygen in enclosures (confined spaces) resulting in oxygen-deficient atmospheres

  12. Human Response to Oxygen-Deficient Atmospheres

  13. Requirements, Recommendations & Guidance • If space meets the definition of a PRCS, must follow 1910.146. • Even if not technically a PRCS, 1910.146 recommended. • Other OSHA standards may apply: • 1910.134 – Respiratory Protection • IDLH Atmospheres • Recognition that temporary enclosures may be PRCSs.

  14. Requirements, Recommendations, & Guidance • Comprehensive confined space training. • Particular attention on hazardous atmospheres

  15. Related Information • OSHA Technical Information Bulletin on incident at: http://www.osha.gov • CSB Morten Report at: http://www.csb.gov/reports/1998/union_carbide/98005lafr.htm • OSHA PRCS Standard, Directive and Interpretation at: http://www.osha.gov

More Related