规定的方法用于测定硅质、低铝耐火粘土和耐火粘土耐火材料和产品的高温锥当量（耐火度）。其有效的应用范围取决于合适的焦聚物参考锥的可用性。它也可用于粗略测定其他耐火材料的耐火度。试验材料的高温锥当量由一个或多个高温参考锥的数量表示。

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.