Receptacles for nuclear subs we don’t machine them but don’t work on them
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"Receptacles" is kind of non descript term to me.


WTF is that little 'dollip' of a weld for?
Just glancing at the parts and seeing 'submarine', for some strange reason, my mind went to poppet seats for the steam admitting valve to the main turbine on a 688 class submarine. I know they are not that, but that's what popped into my head immediately.
After the losses of nuclear subs, the Navy came up with "SubSafe" QA program.
Every single part on submarines built under this new program, will have a Blueprint spec diagram with all the pre requisite dimensional details and material specs. To me it's kinda hard to believe that before this program, this wasn't a requirement in those first gen nuke subs. That was not only the attack submarines, it included the ballistic missile of submarines! What happened to the Thresher could have easily happened to a ballistic missile submarine.
Any repair or replacement of an item or a system aboard a submarine, that the system or part is declared subsafe, meaning that it is critical to keeping water out of the people tank, will have written work package procedure with signatures required at various points of the job. Any kind of change that is needed or asked for, has to be approved by Quality Assurance.
Anyway.....You guys didn't probably want to hear all that rambling, but the point I was trying to get across...... any part made today going into a nuke sub will have specific print specs that need to be met.