Section VIII UG-136(a)(3) states, “Each pressure relief valve on air, water over 140 degree, or steam Service shall have a substantial lifting device which when activated will release the seating force on the disk when the pressure relief valve is subjected to a pressure of at least 75% of the set pressure of the valve.
Code Case 2203 states the lifting device may be omitted provided: The user has a documented procedure and an associated implementation program for the periodic removal of the pressure relief valves for inspection and testing, and repair as necessary.
The omission is specified by the user. The user shall obtain permission to omit the lifting device from the authority having jurisdiction over the installation of pressure vessels.