Scope: This standard provides minimum safety requirements to be followed while entering, exiting and working in confined spaces at normal atmospheric pressure.
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• View the Z1171 - 2016 Brochure
Z117.1 - 2016 Table of Contents
- 1. General10
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- 1.1 Scope10
- 1.2 Exceptions10
- 1.3 Purpose10
- 1.4 Application10
- 2. Definitions10
- 3. Identification and Evaluation16
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- 3.1 Confined Space Survey16
- 3.2 Hazard Identification16
- 3.3 Hazard Evaluation17
- 3.4 Confined Space Classification18
- 3.5 Hazard Re-Evaluation19
- 3.6 Written Program19
- 4. Non-Permit Confined Spaces (NPCS)20
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- 4.1 Controls20
- 4.2 Training21
- 4.3 Re-Evaluation21
- 4.4 Atmospheric Testing21
- 5. Permit Required Confined Spaces (PRCS)21
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- 5.1 Entry Permits21
- 5.2 Permit Implementation22
- 5.3 Validity of Permits22
- 5.4 Revoking Permits23
- 6. Atmospheric Testing23
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- 6.1 General Criteria23
- 6.2 Testing Considerations26
- 6.3 Acceptable Limits27
- 7. Entry Team28
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- 7.1 Attendant28
- 7.2 Entrant29
- 7.3 Attendant(s)/Entrant(s) Communication30
- 7.4 Entry Supervisor30
- 7.5 Atmospheric Tester31
- 8. Isolation and Lockout/Tagout32
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- 8.1 General32
- 8.2 Isolation32
- 8.3 Lockout/Tagout33
- 9. Ventilation34
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- 9.1 Requirements34
- 10. Cleaning/Decontamination35
- 11. Personal Protective Equipment (PPE)36
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- 11.1 General36
- 11.2 Selection36
- 11.3 Inspection38
- 12. Auxiliary Equipment38
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- 12.1 Entry and Exit39
- 12.2 Retrieval Equipment39
- 12.3 Fall Prevention39
- 12.4 Electrical Equipment39
- 13. Safety Signs and Symbols40
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- 13.1 Identification40
- 14. Emergency Response, Evacuation, and Rescue40
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- 14.1 Emergency Response Plan40
- 14.2 Atmospheric Monitoring41
- 14.3 Respiratory Protection Equipment41
- 14.4 Rescue Equipment Inspection42
- 15. Training of the Confined Space Entry Team42
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- 15.1 General Requirements42
- 15.2 Entry Supervisor43
- 15.3 Authorized Entrant45
- 15.4 Attendant47
- 15.5 Atmospheric Tester49
- 15.6 Rescue Personnel50
- 16. Medical Suitability54
- 17. Contractors54
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- 17.1 Hazard Appraisal54
- 17.2 Identification of Rescue Responder55
- 17.3 Permit System55
- 17.4 Coordination56
- 17.5 Ongoing Dialogue56
- Appendices
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- Appendix A - Logic Diagram for Confined Space Entry57
- Appendix B - Standards and Other Referenced and Related Materials
on the Subject of Confined Spaces58
- Appendix C - Examples of Confined Space Surveys and Permits64