On Tue, 05 Dec 2006 14:33:14 -0500, DJ Delorie wrote:

"Mike Marlow" writes:
I think a pipe bomb has quite a bit more than 120 or so psi behind it.

Yeah, but the failure modes are the same. Copper, however, doesn't
fracture at shop pressures - it peels back, which is a "safe" way to
fail in a shop, since there's no flying shrapnel.

On the other hand, the ballistic coefficient of PVC shards is going
to be pretty low.

This would be a good one for "Mythbusters".