R 408.16356 Safety valves.

Rule 6356. (1) A safety valve shall be installed between the steam regulating valve and the vessel on a separate pipe line for each pressure vessel. The safety device shall conform to paragraph U-2 in the ASME Boiler and Pressure Vessel Code, Section VIII, “Unfired Pressure Vessels,” 1989, with addenda, as referenced in R 408.16302. Also see Rule R 408.4025 of the Michigan Boiler Rules, at web-site: http://www.michigan.gov/budget/0,4538,7-157-76309_35738_5698---,00.html. (2) A safety valve shall be checked between each cook to ensure it has not become plugged or corroded to the point of being inoperative. (3) A safety valve shall be inspected not less than annually and repaired if necessary to ensure its ability to operate, and shall be set at not more than the rated capacity of the pressure vessel. (4) The vent for a safety valve shall discharge into an area that does not create a hazard for an employee.