The graphics are just that graphics and have no relationship to the damage model. They are there to remind you that you have taken damage or have advocated Damage Control or Battle Stations.
I find it advantages to avoid planes and running aground, than these annoying
things don't pop up.
I believe TMO addresses the steam pipe thing, it goes away much sooner.
As for the other I've never seen that so I don't really know what may fix it.
I've never played a Porpoise, always start the war with a Narwhal. Like the two deck guns.
Magic