1.1本分类涵盖了用于钢浇注坑服务的某些耐火粘土耐火材料。它只涵盖通过常规制造过程制造的燃烧产品。这种分类的目的是根据在使用中重要的正常特性和特征特性来描述各种类别和类型的材料。 1.2 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。

1.1 This classification covers certain fire-clay refractories for steel pouring pit service. It covers only burned products made by the usual processes of manufacture. The purpose of this classification is to describe the various classes and types of materials in accordance with the normal and characteristic properties that are important in their use. 1.2 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.