If you really want to help your son become a good welder, rig or not, buy him some books. The Pipefitters blue book, the pipe fabricators blue book, Pipe template layout, IPT's metal trades hand book, IPT"S pipe trades hand book.
http://www.pipefitter.com/dolphincar...Cat0001&page=3
http://www.pipefitter.com/dolphincar...Cat0001&page=3
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