WAC 296-301-195. Open tanks and vats for mixing and storage of hot or corrosive liquids

(1) Guardrails must be provided for open tanks and vats which conform to the requirements of WAC 296-24-750 through 296-24-75011 . (2) Shutoff valves. Boiling tanks, caustic tanks, and hot liquid containers, so located that the operator cannot see the contents from the floor or working area, must have emergency shutoff valves controlled from a point not subject to danger of splash. Valves must conform to the ASME Pressure Vessel Code, section VIII, Unfired Pressure Vessels, 1968.