Welding joint issues at the oil and gas feed inlet of the coking distillation tower
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This post was last edited by wt2008 on 2015-8-7 08:56. Experts, there is a small piece of coke at the weld site on the flange of the oil and gas feed inlet of our coking distillation tower; we suspect that oil is leaking. Some people say that the flange at the feed inlet has become worn thin. Could anyone analyze whether this is indeed the case?
Are there any photos? It would be easier to analyze if I could see the actual photos. Furthermore, the proportion of coking-related wear is smaller than that caused by catalytic effects. I’m not sure how long your facility has been in operation – what is the level of coke powder present in the coke towers?
If coking does occur, do not try to remove it; instead, increase monitoring, otherwise it will get worse!
It is most likely that there is incomplete fusion at the weld, and a test can be conducted. Thickness measurement can be carried out around the weld; in the event of wear, the tube wall will thin over a large area.
As above, it is recommended to measure the thickness of the surrounding pipe walls and welds. After all, it’s a critical area subject to high temperatures.
The feed inlet tends to coking easily; you’re not referring to corrosion caused by a high sulfur content, are you?