Michigan Administrative Code
Department - Labor and Economic Opportunity
MIOSHA
General Industry and Construction Safety and Occupational Health Standards
General Industry Safety Standards
Part 65 - MILLS AND CALENDERS FOR RUBBER AND PLASTIC
Section R. 408.16531 - Steam pressure procedures

(1) Where a pressure reducing valve is used, not less than 1 relief valve, set at not more than the rated pressure of the equipment, shall be provided adjacent to the reducing valve on the low pressure side. The relief valve shall vent to an area which will not create a hazard to an employee.

(2) A steam valve to machinery shall be opened slowly to avoid uneven expansion of a pressure chamber.

(3) A cylinder-type machine shall be in motion before steam is admitted.

(4) The rated operating steam pressure of a machine shall not be exceeded.