Cracking of condenser tube sheets and tube welds
Thread Content
Both the tube sheet and the tubes are made of S30408. The fluid flowing inside the tubes is trimethylsilylane, while the fluid flowing outside the tubes is water. The temperature in this system is around 200 degrees. Welding is carried out using a strength-plus-expansion welding method; however, after a few months, cracks appear in the welds between the tube sheet and the tubes. Changing to different manufacturers has not resolved this issue of weld cracking. What causes this? How can this problem be solved? I asked for advice.
It’s probably a manufacturing issue; it’s not suitable for price increases.
The welding joint design between the heat exchange tubes and the tube sheet is inappropriate; in the case of a fixed tube sheet design, it is likely that the calculation of the pulling force between the heat exchange tubes and the tube sheet was not successful.
Considering stress and manufacturing processes. The shell is equipped with expansion joints, and strength welding by tack welding is used. Give it a try
This is a post worth discussing; please try to include images and also explain the solutions offered by other manufacturers. Pool our efforts.
This is the most typical process issue! A temperature of 200 degrees means there’s definitely a large temperature difference! There are definitely no expansion compensators installed on the shell cylinder, so the thermal stresses generated have nowhere to be released or absorbed!
A compensator must be installed on the heat exchanger shell!
Please send the specific conditions! Medium composition?
This is the heat exchanger we manufacture for our customers