In previous tips, I said that you need a test port and two seals on your subsea connectors so that you can verify the integrity of the primary seal prior to running your equipment subsea.
So, which of these two seals is the primary seal? And does this configuration mean you have redundant seals?
Seal B is the primary seal. This is because Seal B sees pressure from the correct direction during testing and when subsea.
Having two seals does NOT mean you have redundant seals. In fact, the sole purpose of Seal A is to allow Seal B to be tested through the test port from the correct direction. If Seal A can hold pressure subsea, then that’s great. But what about that test port?
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