Double Block and Bleed – OSHA vs API
The only OSHA standards that make mention of the phrase “Double Block and Bleed” (DB&B) are its Permit-Required Confined Space (PRCS) standards. In both 1910.146(b) and 1926.1203, OSHA defines a DB&B as: the closure of a line, duct, or pipe by closing and locking or tagging two in-line valves and by opening and locking or […]
