By -
Date 09-03-2005 11:55
Hi Jimmy,
The papers will be forthcoming.
Regardless of the welding process, the root must be protected from the oxidation in the atmosphere. If not, one should be prepared to remove the oxide layer from the inside of the root pass. Actually, plasma arc gouging is probably the preferred method of removing this oxide layer. Heavy grinding can cause localized heat stress, which can, if done improperly, cause microscopic crevices that can lead to cracks. It's unlikely with Duplex, but not impossible.
I'll need your e-mail address in order to send you the papers.
Chuck