How Are Pipelines Ventilated for the Loading of Oil on Ships?
Transporting crude oil through pipelines sometimes is neither economically viable nor technically feasible. Therefore, the oil is often transported in large tank ships to its place of destination.
At a lading port for petrochemical products or crude oil the product is pumped into the ship’s cargo hold through pipelines. The pumping process is initially relatively slow because the entire pipeline is still completely filled with nitrogen.
In the beginning, the flow velocity of the filling process is at 0.5 m/s to ensure that no pressure surges will be generated. Once the major part of the nitrogen gas has escaped, the pressure within the pipeline slowly rises until economical flow velocities of more than 3 m/s have been achieved.
Bleeding and venting valves are used to discharge the nitrogen gas from the pipelines. Startup bleeding valves are installed at the pipeline endpoints whilst pipeline high points are furnished with continuous bleeding valves, which safely discharge gas bubbles.
Get detailed information about continuous Bleeding and Venting Valves.
Mankenberg Compact Standard Bleeding Valve EB 1.12
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Technical and commercial representative - PROTEGO? Braunschweiger Flammenfilter GmbH & ENGEQUIP - INGERSOLL RAND COMPRESSORS
6 年WE CAN PROTECT THE GAS BALANCE LINE WITH PROTEGO FLAME ARRESTER
Chemical Technology
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Consultant
6 年The transfer process, should initially be started slow anyway. The bottom should be covered, to prevent static electricity by the oil flowing across the tank bottom.