Double Block and Bleed System

{
  "id": "MLC-T-ENV-008460",
  "term": "Double Block and Bleed System",
  "field": "Environment",
  "definition": "1. Two block valves connected in series with a bleed valve or line that can vent the line between the two block valves. [40 CFR 60.481 (CFR 2013)] [40 CFR 60.481a (CFR 2013)] [40 CFR 63.1001 (CFR 2013) ][40 CFR 63.1020 (CFR 2013)][40 CFR 63.1251 (CFR 2013)] [40 CFR 63.1361(CFR 2013)][40 CFR 65.2 (CFR 2013)] [40 CFR 60.481b (CFR 2024)] [40 CFR 60.5430b (CFR 2024)]\n\n2. Double block and bleed is the closure of a line, duct, or pipe by closing and locking or tagging two in-line valves and by opening and locking or tagging a drain or vent valve in the line between the two closed valves.",
  "references": [
    "40 CFR 63.101 (CFR 2024)",
    "EPA Emergency Responder Health and Safety Manual - Chapter 10: Confined Space Safety Program"
  ],
  "url": "https://mlchart.com/terminology/environment/double-block-and-bleed-system/"
}