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Codes and standards published by NFPA are displayed as read-only under license from NFPA solely for use within this system. NFPA material may not be downloaded, printed, reproduced, or transferred.

Use this test method to measure smoke obscuration of materials up to 25mm in thickness when exposed to specified levels of thermal irradiance.
 

Document History

  1. NFPA (Fire) 270


    Standard Test Method for Measurement of Smoke Obscuration Using a Conical Radiant Source in a Single Closed Chamber, 2023 Edition

    • Most Recent
  2. NFPA (Fire) 270


    Standard Test Method Measurement of Smoke Obscuration Using a Conical Radiant Source in a Single Closed Chamber, 2018 Edition

    • Historical Version
  3. NFPA (Fire) 270


    Standard Test Method Measurement of Smoke Obscuration Using a Conical Radiant Source in a Single Closed Chamber, 2013 Edition

    • Historical Version
  4. NFPA (Fire) 270


    Standard Test Method Measurement of Smoke Obscuration Using a Conical Radiant Source in a Single Closed Chamber, 2008 Edition

    • Historical Version
  5. NFPA (Fire) 270


    Standard Test Method Measurement of Smoke Obscuration Using a Conical Radiant Source in a Single Closed Chamber, 2002 edition

    • Historical Version
  6. NFPA (Fire) 270

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    Measurement of Smoke Obscuration Using a Conical Radiant Source in a Single Closed Chamber, 1998 edition

    • Historical Version