Oregon Revised Statutes Protection from Fire § 480.580

(1) The chief boiler inspector or any deputy inspector may, at all reasonable hours, in performance of the duties imposed by the provisions of ORS 480.510 to 480.670, enter into all buildings and upon all premises, except private residences, for the purpose of inspecting any boiler or pressure vessel that is covered by ORS 480.510 to 480.670 and that the chief boiler inspector or the deputy inspector has reasonable cause to believe is located therein.

(2) No person shall interfere with or prevent any such inspection by the chief boiler inspector or a deputy inspector.