Section 12-220-10 - Pressure relief devices No(a) No person shall attempt to remove or do any repair or modification on any pressure relief device prescribed by these rules while the device is subject to pressure.(b) Should any of these pressure relief devices be removed for repair during an outage of a boiler or pressure vessel, they must be re-installed and in proper working order before the object is placed in service.(c) No person shall alter any safety or safety-relief valves or pressure relief devices in any manner to maintain a working pressure in excess of that stated on the pressure retaining item operating permit.(d) Repair of safety valves shall be made only by an organization which holds a valid certificate of authorization for use of the National Board "VR" safety valve repair symbol stamp.(e) Where a valve has been tested and adjusted to restore the set pressure shown on the unmodified original nameplate or stamping, or repair nameplate but not otherwise repaired, a "Test Only" nameplate shall be applied.[Eff 12/6/82; am 12/8/86; ren § 12-220-10 and comp 12/6/90; am 7/6/98; am 6/19/00] (Auth: HRS § 397-4) (Imp: HRS § 397-4)