This paper describes the procedure, results, and error analysis from a study which characterizes a product lot of low-density, glass-fiber insulation material in terms of apparent thermal conductivity. The uncertainty of the measured values for each of the 75 specimens is estimated to be ± 1.4 percent. The data were taken at a mean temperature of 24°C (75°F), and the specimen thickness was 25.4 mm (1 in.). It is recommended that this lot be made available for distribution as a Standard Reference Material from the Office of Standard Reference Materials of the National Bureau of Standards.
ASTM C 177-76, Standard Test Method for STEADY-STATE THERMAL TRANSMISSION PROPERTIES BY MEANS OF THE GUARDED HOT PLATE, 1982Annual Book of ASTM Standards, American Society for Testing and Materials, Part 18, pp. 20-53 (1982).
2.
ASTM C 518-76, Standard Test Method for STEADY-STATE THERMAL TRANSMISSION PROPERTIES BY MEANS OF THE HEAT FLOW METER, 1982Annual Book of ASTM Standards, American Society for Testing and Materials, Part 18, pp. 222-253 (1982).
3.
"Provision and Evaluation of Proficiency Test Specimens for NVLAP and for OSRM," Johns-Manville Contract Report EO-A01-78-00-3586 (October 1979).
4.
B. Rennex, "Low-Density Thermal Insulation Calibrated Transfer Specimens— A Description and a Discussion of the Material Variability," NBSIR82-2538 (1982).
5.
B. Rennex, "Error Analysis for the NBS 1016 mm Guarded Hot Plate," Journal of Thermal Insulation, 7, 18-51 (July 1982 ).
6.
B. Rennex, "Summary of Error Analysis for the National Bureau of Standards Guarded Hot Plate and Considerations Regarding Systematic Error on the Heat-Flow-Meter Apparatus" (to be published under the proceedings of the American Society of Testing and Materials, Philadelphia : Symposium on Guarded-Hot-Plate and Heat-Flow-Meter Apparatuses in 1982).
