Volume 27, Issue 6 (November 1999)

    Interlaboratory “Pilot Run” Study of Small Heat-Flow-Meter Apparatus for ASTM C 518

    (Received 12 October 1998; accepted 27 August 1999)

    CODEN: JTEOAD

      Format Pages Price  
    PDF 11 $25   ADD TO CART


    Abstract

    Thermal conductivity measurements of a high-density glass-fiber thermal insulation material near 24°C are presented for the determination of the precision and bias of ASTM Test Method C 518. The measurements have been conducted by 13 laboratories using small (305 by 305-mm) heat-flow-meter apparatus on three specimens of high-density glass-fiber thermal insulation material that were circulated among the laboratories. Test results are analyzed using ASTM Practice E 691 and subsequently compared to measurements of the same specimens conducted in a guardedhot-plate apparatus using ASTM Test Method C 177. The 95% repeatability and reproducibility indexes for precision have been determined to be no worse than 1.1 and 4.0%, respectively. A method for estimating bias is presented.


    Author Information:

    Zarr, RR
    Mechanical engineer, National Institute of Standards and Technology, Gaithersburg, MD

    Lagergren, ES
    Mathematical statistician, Nabisco, East Hanover, NJ


    Stock #: JTE12163J

    ISSN: 0090-3973

    DOI: 10.1520/JTE12163J

    ASTM International is a member of CrossRef.

    Author
    Title Interlaboratory “Pilot Run” Study of Small Heat-Flow-Meter Apparatus for ASTM C 518
    Symposium , 0000-00-00
    Committee E37