An investigation of faulty pipe welds on Virginia-class submarines assembled at Northrop Grumman Newport News has been broadened to include aircraft carriers and another class of submarines.
The assessment will cover non-nuclear piping systems on carriers and subs repaired and built by shipyard workers in recent years, shipyard and Navy officials said Monday.
A shipyard spokeswoman described it as a precautionary move after the discovery in recent weeks of contaminated welds on some of the Virginia-class submarines the yard has assembled. It's possible that welders made the same mistake on other vessels - using the wrong type of metal weld filler to join non-nuclear piping systems.
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