International Organization for Standardization (ISO)
Latest
ISO 528:1983
Scope
The specified method is used for determining the pyrometric cone equivalent (refractoriness) of siliceous, low alumina fireclay and fireclay refractory materials and products. Its usefull range of application depends on the availability of suitable pyromeric reference cones. It may also be used for roughly determining the refractoriness of other refractory materials. The pyrometric cone equivalent of the test material is expressed by the number or numbers of the pyrometric reference cone or cones.
ISO 528:1983 history
1983ISO 528:1983 Refractory products; Determination of pyrometric cone equivalent (refractoriness)