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USS MINNESOTA SSN 783 UNFORTUNATELY: https://www.navytimes.com/story/military/2016/03/27/minnesota-two-years-in-the-yards-virginia-class-attack-sub/81600432/ Speed of construction is offset by shoddy pipe welds.

The Minnesota, the 10th Virginia-class attack boat, was delivered 11 months ahead of schedule. But it has been in the shipyards at Electric Boat in Groton, Connecticut for two years — more than twice as long as a normal post-shakedown availability. It still has months to go. The plankowner crew has spent only a handful of days at sea since joining the fleet and experts say they're likely to forfeit their whole deployment cycle, forcing fleet bosses to make tough decisions about whether to extend deployments or withhold forces from missions overseas.
News of the lousy parts first emerged in August, a month after the Minnesota was to have finished its overhaul. Since then, a Justice Department-led investigation is examining the quality control issues that led the shoddy part to be installed in the $2.7-billion sub.
The same shoddy elbow joints were installed aboard attack subs North Dakota and John Warner, forcing the Navy to spend millions of dollars and many more months to repair them. If these pipes ruptured, they would leak steam and force the submarine to take emergency measures that would impair its combat effectiveness.