What causes the cracks in the expansion joints of the catalytic light oil feed slant tubes?
Thread Content
Our plant is equipped with a catalytic dual lift tube dual settler unit; it has been in operation for half a year now. When the light oil lift tube was brought into flow, the expansion joint in the light oil feed line leaked. What is the cause? ? ? Could someone give me some advice? ?
Leakages in expansion joints generally occur mainly on the flue gas pipeline, with sulfur corrosion being the primary cause, whereas the raw slurry tubes are lined. According to you, it’s a leakage that occurs during startup fluidization; it should be an expansion issue
It may be due to the fact that the operation has been going on for a short time, it was left unattended for too long, and also because of the rapid increase in temperature
It’s likely that the wrong material was used for the bellows.
First, the material and quality of the expansion joint itself need to be considered； Another issue is the rate of temperature increase and decrease during the operation.