Another ? on my production job...

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I need to make two 90 degree bends in 3/4" black pipe by welding two fourty fives together. My welds are pretty need but need to be almost in a buffed smooth finish as to not see grinding marks. What are my best options for polishing arounmd these welded corners? Doesn't need to be polished just smooth and clean looking. Belt sander? Buffing tool? Sanding disks? Scotch brite? A wire wheel on a bench grinder? Just trying to weight out my options. Dave
Reply:I'm guessing your Tigging .We usually get most of the weld off with a portagrind belt sander with a fine belt taking care not to hit parent material just the weld.Then a pipe linisher with fine abrasive belt finishing  with pipe linisher and scotch brite.I dot recommend flap discs unless you have a lot to remove as the scratches go the wrong way and it does not have the finesse of a belt sander.All our stuff is stainless though.A good guess is better than a bad measurement
Reply:use a belt sander, dynafiles work good for us.  Sand it smooth, then we use a benchtop belt sander with very fine belts, a-45 then a-16 then a-6.  Then it gets a nylon mesh grinder wheel then a cotton buffer wheel.Have we all gone mad?
Reply:A die grinder and a small cutting bit will shape the contour nicely, then you need a different bit to sand, buff and/or polish. I get small scotch brite disc's that fit a pad holder for this tool that are just right after the cutter.A dremel might do for a small job, I finally burned up my electric motor though. (It might only need brushes.)Last edited by tanglediver; 12-08-2007 at 11:03 PM.City of L.A. Structural; Manual & Semi-Automatic;"Surely there is a mine for silver, and a place where gold is refined. Iron is taken from the earth, and copper is smelted from ore."Job 28:1,2Lincoln, Miller, Victor & ISV BibleDanny