"William Wixon" wrote in message
...

"Charles P Lamb" wrote in message
. ..
How are commercial chain links welded? My first guess is using
resistance but I would guess the electricity would be more likely to take
the path around the link than across the touching faces.



that's funny (was thinking about this last night). that's something i've
always wondered about welded seam pipe. how come the electricity doesn't
flow around the back instead of through the joint. i mean, obviously it
works, but it would seem to me the juice would flow through the metal
instead of through the weld.

You'd think that, but you'd be wrong.

I have an old DoAll saw equipped with a blade welder. If you try to weld
pieces that do not complete a loop, it won't weld them. Sort of defies
everything you think you know about electricity, doesn't it?

Harold