Line Opening References:
- OSHA Safety & Health Bulletin – Confined Spaces
https://www.osha.gov/SLTC/confinedspaces/hazards_solutions.html
- OSHA 29CFR1910.146 Permit Required Confined Spaces
https://www.osha.gov/pls/oshaweb/owadisp.show_document?p_id=9797&p_table=STANDARDS
- OSHA Information Booklet – Permit-Required Confined Spaces
https://www.osha.gov/Publications/osha3138.html
- UK Health & Safety Executive: The Confined Spaces Regulations 1997
http://www.legislation.gov.uk/uksi/1997/1713/contents/made
- UK Health & Safety Executive: Confined spaces. A Brief guide to working safely
http://www.hse.gov.uk/pubns/indg258.pdf
- CSB Safety Bulletin “Confined Space” November 2006
- CSB Safety Bulletin “Hazards of Nitrogen Asphyxiation” June 2003
General Guidance on Permit to Work (including Confined Space Entry)
- UK Health & Safety Executive: Guidance on Permit to Work Systems
http://www.hse.gov.uk/pUbns/priced/hsg250.pdf
- International Association of Oil and Gas Producers: Guidance on Permit to Work Systems
http://www.ogp.org.uk/pubs/189.pdf
- Norwegian O&G Association - Recommended Guidelines for a Common Model for Work Permits