SIZE, TEMPERATURE, APPLICATION, MATERIAL, PRESSURE
stands for SIZE; I.D., O.D. and length
stands for TEMPERATURE of the material conveyed and environmental
stands for the APPLICATION, the conditions of use
stands for the MATERIAL being conveyed, type and concentration
stands for the PRESSURE to which the assembly will be exposed
stands for ENDS; style, type, orientation, attachment methods, etc.
stands for DELIVERY; testing, quality, packaging, and delivery requirements