Specifies the design, construction and testing of safety valves as well as other valves that are intended for use on land boilers, steam vessels and piping installations. Deals with safety valves, stop valves, feed valves, boiler blowdown valves/cocks for application to boilers, main and auxiliary steam pipes, feed and boiler blowdown piping in connection therewith. Does not cover the selection, operation or application of valves.