Corrosion and perforation of heat exchanger expansion joints
Thread Content
The expansion joint on the shell side of the heat exchanger, made of 316L material, is corroded, but no corrosion was found on the tubes (of the same material). Is this due to the quality of the expansion joint?
Did the properties of the material change during manufacturing?
What about the wall thickness of the expansion joint? ~~Additionally, consider whether it is caused by underscale corrosion~~
It is likely that there are local defects in the material itself, and these defects become more pronounced after processing.
The expansion joint has been cut off; for an overview of the corrosion, please see the image below
Contact the manufacturer; this phenomenon is likely due to a material issue.
It’s possible that the properties of the material changed during manufacturing
Obviously, there’s a problem with the material; it has cracks
There are no cracks; it’s uniform decay. Double-layer expansion joint.