Autoclaves and small pressure vessels must have American Society of Mechanical Engineers (ASME) and Underwriters Laboratory (UL) certifications, unless exempted by size and operating pressure. Staff and lab workers must follow manufacturer’s operating, inspection, testing and maintenance instructions. An inspection is required every two years by the Washington State Department of Labor & Industries (L&I) or its authorized agent. If the equipment is physically damaged, it must be repaired and recertified, or taken out of service and disposed.