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Well since that damn cisco guy went and gave actual info...DOM (drawn over mandrel) is a finishing process usually done to CREW (COLD rolled electric welded) tube.Pretty much any tube (or pipe for that matter) you're going to find is a welded construction, starting from a strip of flat sheet. The sheet is rolled into the tube shape, and welded in a continuous process. This gives a good tube with a small weld bead on the inside.Once you have the basic tube, you can draw it over a mandrel. This work hardenes the tube and "squishes" the weld to the point that it's barely noticable. DOM tube is smooth inside and out, of superior strength, and made to tighter dimensional tolerances than the the welded tube it was made from.DOM tube should be about 30% stronger than equivelant HREW.
Well since that damn cisco guy went and gave actual info...
DOM (drawn over mandrel) is a finishing process usually done to CREW (COLD rolled electric welded) tube.
Pretty much any tube (or pipe for that matter) you're going to find is a welded construction, starting from a strip of flat sheet. The sheet is rolled into the tube shape, and welded in a continuous process. This gives a good tube with a small weld bead on the inside.
Once you have the basic tube, you can draw it over a mandrel. This work hardenes the tube and "squishes" the weld to the point that it's barely noticable. DOM tube is smooth inside and out, of superior strength, and made to tighter dimensional tolerances than the the welded tube it was made from.
DOM tube should be about 30% stronger than equivelant HREW.
