Section R. 408.18158 - Icing and topping machinesRule 8158.
(1) An agitator for an icing and topping machine which is too heavy to lift out shall be hinged to swing up, out of the way, or lifted by mechanical means so the hopper may be removed.(2) A hot water or steam-jacketed hopper for an icing and topping machine shall have a pressure relief valve set at not more than the maximum allowable working pressure of the vessel. The hopper shall be insulated or guarded to prevent burns from accidental contact. The valve shall be vented to an area where the employee is not exposed to the hazard.Mich. Admin. Code R. 408.18158