SAN BRUNO, Calif., Jan. 22 (UPI) -- An inferior weld caused a San Bruno, Calif., gas pipeline explosion that killed eight people and destroyed 38 homes in September, officials said. The metallurgical ...
An optical microphone can detect major defects in laser welding copper wires.
It turns out that the whistle-blower whose call to the FBI triggered the big investigation into alleged faulty welds on the new Bay Bridge hadn't even been calling about welds. In fact, apprentice ...
Caltrans paid hundreds of millions of dollars over the original bid price for work on the Bay Bridge eastern span that was plagued by shoddy welding and completed more than a year late, state ...
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