Determination of Pyrometric Cone Equivalent (Refractoriness) - Test Method - BS EN 993-12:1997, BS 1902-5.2:1997
Methods of test for dense shaped refractory products. Determination of pyrometric cone equivalent (refractoriness).
Refractoriness is the characteristic property of a material that allows it to withstand high temperature.
A pyrometric reference cone is a blunt-tipped skew triangular pyramid with sharp edges, of specified shape and dimensions and of such composition that when mounted and heated under specific conditions, it bends in a known manner with reference to the temperature.
Test pieces of refractory materials or products are raised in temperature, under specific conditions, alongside pyrometric reference cones of known refractoriness, and their behaviour is compared with that of the reference cones.