OAR 918-225-0370: Exemptions for Coil-Type Water Boilers

Coil-type water boilers, where the water can flash into steam when released directly to the atmosphere through a manually operated nozzle, are exempt from ORS 480.510 to 480.665 if the following conditions are met: (1) There is no drum, header, or other steam space; (2) No steam is generated within the coil; (3) Tubing outside diameter does not exceed one inch; (4) Pipe size does not exceed NPS 3/4; (5) Nominal water capacity does not exceed six gallons; (6) Water temperature does not exceed 350° F; (7) Adequate safety relief valves and controls are provided.