Re: Imagine the force of the explosion

in an HX machine:
if the pressurestat were to stick closed (a frequent occurrence)

AND

the safety valve were to fail shut. (fairly rare)

ouch.

Dave

I was talking to a tech who had seen a multiple failure of protection
systems. Apparently the only reason the machine didn't go further was the
water line. The porcelin cups made a nice scatter pattern on the ceiling...

Equally, I have an old friend who watched three robust critical safety
devices fail, and two of his colleagues killed as a result while he watched.
Until that point it was considered that the three safety system was going
overboard on safety, as the first safety device didn't fail.

Safety systems do fail in sequence.

Brent


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