Patent ID: 6045659
Filing Date: 2000-04-04
Classification: F17C

Abstract:
A safety device in an oil/gas treatment plant where excess gas is intercepted from a number of sources and led through a collection conduit for advancing for recovery, the collection conduit downstream of the sources includes a branching point having a branch conduit leading to a torch, the safety device comprising:a normally closed first valve in the branch conduit, the first valve being controlled by a signal from a continuously registering pressure-measuring instrument positioned in the collection and branch conduits upstream of the first valve;a normally closed second valve in a circulation conduit connected to the branch conduit on both sides of the first valve; anda normally opened third valve in the collection conduit downstream of the branching point, the third valve being closed when at least one of the first and second valves is open;wherein the safety device normally closes off the branch conduit, but secondarily opens the branch conduit for diverting the excess gas to the torch when the pressure of the excess gas exceeds a given value and/or when a malfunction occurs in the plant.