A Category M Fluid Service for the process piping design is a fluid where a single exposure of the fluid to human tissue will cause serious irreversible damage and the potential for personnel exposure must be judged to be significant. The Category M Fluid Service could be Hydrogen Sulphide (H2S) gas, high concentrations of Hydrochloric Acid or high pressure steam and designed the requirements of Chapter VIII of ASME B31.3. (Refer to the Fluid Service (ASME B31.3))
Related Definitions in the Project: The Piping and Pipeline Engineering
