scope:

This International Standard specifies mandatory and optional markings of general purpose industrial valves and states the manner of applying the markings, i.e. on the body, on a flange, or on an identification plate. Markings on the body may be integral with the body or on a plate securely fixed to the body. The material of this plate, which is distinct from the identification plate mentioned above, and the method of fixing to the body will be specified in the International Standard for the individual type of valve.