roller expanding SS 304
roller expanding SS 304
(OP)
Does anyone have any wisdom to share with roller expanding SS 304 tubes 3/8" od. Im looking for tips, comments, gotchas, or anything helpful thanks.
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RE: roller expanding SS 304
RE: roller expanding SS 304
Do you have a torque-control motor and drive? Do you have any operators experienced with rolling small diameter tubes? Are you roller expanding only, or will you be doing a strength or seal weld in addition?
-TJ Orlowski
RE: roller expanding SS 304
RE: roller expanding SS 304
-TJ Orlowski
RE: roller expanding SS 304
RE: roller expanding SS 304
Make sure your mandrel is inserted no more than 1/2" from the front face of the tube sheet. Get an extra set of rollers. The manufacturer/distributor of your expander can give more advice about what you want to use to drive it.
Expand the tubes one hemisphere at a time, and start with the largest bend radius. Don't expand one leg of the u-tube, then it's other leg. Just expand one whole half, then move to the next half.
-TJ Orlowski
RE: roller expanding SS 304
RE: roller expanding SS 304
For such applications our shop people like to use petroleum jelly, either alone or with a little kerosene, for the lubricant. We have also seal welded tubes of your size in thin tubesheets. We did this by trimming the tube ends to the shortest length possible and randomly welding the tubes with the smallest weld possible so there is no straight lines in the weld pattern.
RE: roller expanding SS 304
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Plymouth Tube