Which code is cited in the recommended practice of API 936?

The recommended practice of API 936 cites C113 - Standard test method for Reheat Change of Refractory Brick as it is vital for understanding how the physical characteristics of refractory materials change when exposed to high temperatures. This is particularly important in applications where refractories are subjected to thermal cycling, as it directly affects performance, durability, and the overall lifespan of the material in service.

C113 specifically addresses the dimensional stability of refractory bricks upon reheat, providing essential data that can help in evaluating their suitability for various high-temperature applications. By analyzing how much a refractory material expands or contracts when heated, engineers can make informed decisions about material selection and application design for safer and more effective operations.

The other standards mentioned focus on different aspects of refractory materials' performance, including strength, density, and thermal conductivity, but do not specifically pertain to the critical thermal behavior under reheating conditions that C113 addresses.