Strength weld between tube and tube sheet of HX
Strength weld between tube and tube sheet of HX
(OP)
As per TEMA the grooves in the tube sheet holes are not required if tube is strength welded with the tube sheet. Can someone clarify the difference between strength weld and seal weld?





RE: Strength weld between tube and tube sheet of HX
Regards,
Mike
RE: Strength weld between tube and tube sheet of HX
I've seen seal welds in high pressure (5000 psi) Hx's where the strength rolling was missed - a whole row of quite a few tubes in the case I am thinking of, and after ~20 years, other parts of the Hx were worn out, but the seal welded only row was still holding. Heck of a deal.
rmw
RE: Strength weld between tube and tube sheet of HX
1. where the tube protrudes out of tube sheet
2. where the tube end is slightly inside the tube sheet face
Which configuration is preferable with reference to future maintenance.
RE: Strength weld between tube and tube sheet of HX
RE: Strength weld between tube and tube sheet of HX
On a side note: strength welded tubes can have grooves and can be rolled AFTER welding. This provides two mechanical seals, normally used in lethal service or critical service as defined by the user.