From my email inbox:
<<Incidentally, regarding your
question for as why the holes are straddled center line of a
flange it
is because the pipefitters are putting two dowels in the flange
holes
and putting a level over the dowels which ensure that the holes
will be
straddled. I don't know if this is the real answer but I believe
it is
one of them.>>
Received on Fri Jun 22 10:38:00 2001
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