Sealing Device Requirements

Section 218 Section 218.451  Sealing Device Requirements Except for safety pressure relief valves, no owner or operator of a petroleum refinery shall install or operate a valve at the end of a pipe or line containing VOMs unless the pipe or line is sealed with a second valve, blind flange, plug, cap or other sealing device.  The sealing device may be removed only when a sample is being taken or during maintenance operations.