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Suck-back in tack tie in

by Darryl
(Hammond, IN)

Hello, i'm a Boilermaker and i've been practicing TIG welding for about six months. I'm getting the hang of it but I just want to ask one question. What's the best method to use to prevent suck-back and incomplete penetration when tying into the tack on the TIG root pass ?

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I use a grinder to feather the tacks i tie into, but not the side of the tack weld i start on.

check it out in this video. Its plate, not pipe but I think it will answer your questions, its easier to show than explain.

good luck

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