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FM Approvals 4922
- Fume Exhaust Ducts or Fume and Smoke Exhaust Ducts
- standard by FM Approvals, 04/01/2001
- Publisher: FM Approvals
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This standard states Approval requirements for ducts used in exhausting noncombustible chemical fumes and corrosive vapors or noncombustible chemical fumes, corrosive vapors and smoke in fire situations
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