Oxygen – services with greater than 23.5% oxygen.Applicability of oxygen service will be defined in the equipment package.Toxic – Category M fluid and lethal service fluids as defined by ASME B31.3.Applicability of toxic requirements will be defined in the equipment package.Normal Fluid – As defined by ASME B31.3; includes cryogenic and flammable fluids; temperature range limited by that in Table 1Category D Fluid – Category D fluid as defined by ASME B31.3; includes non-flammable, non- toxic fluids meeting ALL of the following requirements:Design pressure is not greater than 150 psig (1035 kPag)Design temperature is not less than -20°F (-29°C)Design temperature is not greater than 366°F (186°C)PES – Project Equipment Specification