ASTM C 165

Standard Test Method for Measuring Compressive Properties of Thermal Insulations

This test method covers two procedures for determining the compressive resistance of thermal insulations.Procedure A covers thermal insulations having an approximate straight-line portion of a load-deformation curve, with or without an identifiable yield point. Such behavior is typical of most rigid board or block-type insulations. Procedure B covers thermal insulations that become increasingly more stiff as load is increased. Such behavior is typical of fibrous batt and blanket insulations that have been compressed previously to at least the same deformation by compression packaging or mechanical softening.

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