A couple years ago, a high-pressure vessel containing water and air was operating on a much higher psi than its design allowed. After years of too much pressure, a small leak developed. It was caught and welded shut. But a month later, the welding job, which did not adhere with safety codes, failed, causing the vessel to rupture and explode. Pieces of shrapnel metal weighing over a thousand pounds traveled at extremely high speeds up to a half-mile before landing on nearby highways and railways. A large portion of the plant was destroyed, half the state was without phone or electricity, and 3 plant workers were killed. If the contents had been flammable, there would have been an explosion too, making the accident much more devastating. Pretty intense, huh? Unfortunately, pressure vessel incidents like this happen much more than they should.
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