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<p>[QUOTE=&quot;Cattleman84, post: 12227201, member: 206523&quot;]I guess I&#039;ve got this one. Its a stainless steel bung used to attach a valve to a big poly storage tank. I built 5 or 6 of them IIRC. All tig welded.</p><p><br /></p><p>[ATTACH=full]439421[/ATTACH]</p><p><br /></p><p>The bottom flange is just to stabilize the top flange to minimize warping while I welded it. Once it cools that is removed. Put a gasket on it and slide it through the hole from inside the poly tank, the second flange goes over the pipe and bolts from the outside and is tightened down with nuts to squeeze the gasket firmly between the welded flange and the inside of the tank.[/QUOTE]</p><p><br /></p>

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