Vapor-mounted seal

{
  "id": "MLC-T-ENV-029507",
  "term": "Vapor-mounted seal",
  "field": "Environment",
  "term_source": "Vapor-Mounted Seal",
  "definition": "1. Foam-filled primary seal mounted continuously around the circumference of the tank so there is an annular vapor space underneath the seal. The annular vapor space is bounded by the bottom of the primary seal, the tank wall, the liquid surface, and the floating roof.\n\n2. Continuous seal that is mounted so that there is a vapor space between the stored liquid and the bottom of the seal.\n\n3. Rim seal designed not to be in contact with the stored liquid. Vapor-mounted seals may include, but are not limited to, resilient seals and flexible wiper seals.\n\n4. Continuous seal that completely covers the annular space between the wall of the storage tank or waste management unit and the edge of the floating roof and is mounted such that there is a vapor space between the stored liquid and the bottom of the seal.\n\n5. Continuous seal that is mounted such that there is a vapor space between the liquid in the unit and the bottom of the seal.\n\n6. Continuous seal that completely covers the annular space between the wall of the storage vessel or waste management unit and the edge of the floating roof and is mounted such that there is a vapor space between the stored liquid and the bottom of the seal.",
  "subject": "Built environments",
  "references": [
    "40 CFR 60.111 (CFR 2013); 40 CFR 60.111a (CFR 2013)",
    "40 CFR 65.2 (CFR 2013)",
    "40 CFR 63.1061 (CFR 2013)",
    "40 CFR 63.1251 (CFR 2013); 40 CFR 63.1361 (CFR 2013)",
    "40 CFR 63.681 (CFR 2013); 40 CFR 265.1081 (CFR 2013)",
    "40 CFR 63.101 (CFR 2024)"
  ],
  "url": "https://mlchart.com/terminology/environment/vapor-mounted-seal/"
}