Standard Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus, ASTM C518-21

Test method providing a rapid means of determining the steady-state thermal transmission properties of thermal insulations and other materials with a high level of accuracy when the apparatus has been calibrated appropriately.  This version of the standard was published in the year 2021 and is available for preview and purchase at the reference link.  Other versions of the standard were published in the years 2017, 2015, 2010, 2004, 2002, 1998, and 1991, and are available for preview and purchase at the reference link.