Tube to tubesheet joint
Tube to tubesheet joint
(OP)
1. Can I know what is the advantage of strength welding over seal welding for tube to tubesheet joint?
2. Is there any requirement that the tube must protrude out of the tubesheet by how manny mm?
2. Is there any requirement that the tube must protrude out of the tubesheet by how manny mm?





RE: Tube to tubesheet joint
2. 3 mm is the USUAL required tube protrusion, but TEMA limits the protrusion to max half tube diameter and zero for vertical exchangers to facilitate the drainage (refer TEMA Clause RCB-7.313).
RE: Tube to tubesheet joint
RE: Tube to tubesheet joint
Please note that the preferred method of attaching tubes to their tubesheet is still rolling them into a drilled hole that has two grooves cut into it. "If everybody does something the same way, there must be a good reason"
RE: Tube to tubesheet joint
RE: Tube to tubesheet joint
Regards,
Mike
RE: Tube to tubesheet joint
Here is an excellent answer to this question:
http://hghouston.com/Resources/DiscussionForums/ta...
MJCronin
Sr. Process Engineer
RE: Tube to tubesheet joint
A lot of seal welds are done with automated autogenous TIG. Common tube projection is 1/2 - 1 times the wall thickness.
For example Ti condenser tubes are too soft to generate enough joint strength by just rolling, so an autogenous TIG seal weld is added. They do this to millions of tubes with 0.020" - 0.035" (0.5mm-0.9mm) wall thickness.
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Plymouth Tube