This Practice describes the requirements for certification and prequalification of the refractory materials used to construct monolithic refractory linings in process equipment and piping. This Practice provides a basis for selection, purchase, and quality control of refractory materials before installation. This Practice describes the material property, testing, documentation, storage, and shipping requirements for commercial refractory materials used to construct monolithic refractory linings in process equipment and piping. These materials can be installed by gunning, casting, pumping, or hand packing as specified.