Seal Welding and Strength Welding
Seal Welding and Strength Welding
(OP)
Can anyone please explain the difference between seal welding and strength welding of heat excahnger tube to tube sheet joints.
As far as i understand Strength weldg is determined by performing a mock up of the joint followed by push out test.
As far as i understand Strength weldg is determined by performing a mock up of the joint followed by push out test.





RE: Seal Welding and Strength Welding
RE: Seal Welding and Strength Welding
Have you looked at UW-20?
RE: Seal Welding and Strength Welding
A strength weld is provided "to carry longitudinal tube loads", and it also provides additional leak tightness. The procedure is essentially the same as a seal weld, except the tube hole in the tubesheet is beveled (ie. 45 deg bevel or j-groove) to allow filler metal to be deposited. Generally, this is a 2-pass weld.
RE: Seal Welding and Strength Welding