- Author
-
Gross, D.
- Title
- Round Robin Flame Spread Tests by the Radiant Panel Test Method.
- Coporate
- National Bureau of Standards, Gaithersburg, MD
- Report
-
NBS 6319
February 24, 1959
14 p.
- Distribution
- AVAILABLE FROM: National Archives, Civilian Records, Room 2800, 8601 Adelphia Road, College Park, MD 20740-6001, Telephone: 301-713-7230
- Contract
- NBS-PROJECT-1002-20-4875
- Keywords
-
radiant panel test method
- Abstract
- A report is presented of the first interlaboratory comparison of flame spread measurements as determined by the radiant panel test method. A total of eight laboratories including National Bureau of Standards made measurements on four acoustical tile materials provided by ASTM Committee C-20. Analysis of the results indicate that the precision of the measurements within laboratories was similar but that considerable systematic bias was observed between different laboratories. These biases were such that the participating laboratories yielded flame spread indices which were generally lower than those measured by NBS. Subsequent checks on radiation pyrometers and radiation measuring techniques used by five of the seven participating laboratories indicate that the radiant panel energy output level used by these laboratories was lower than that intended. Although other differences were observed between the test methods used and the results obtained at the various laboratories the primary cause of the biases observed appears to have resulted from the use of uncalibrated radiation pyrometers.