Vaccum stiffening rings that interfere with nozzles
Vaccum stiffening rings that interfere with nozzles
(OP)
I just started the design work for a replacement tray tower for a local refinery. They want it built pretty much as is but to meet their current specs and reuse existing ladders & platforms. This vessel has 7 vacuum stiffening rings for external pressure. Two of the rings pass through nozzles and one of the two actually passed through 3 nozzles. I have never designed a vessel that this was done and always considered it bad practice. Compress shows it as a deficiency in the report, but not as a failure. The customer specs say nothing about the practice, the vessel was built prior to the current company's ownership of the plant. Is this a viable method of placement of the rings? I am looking a moving the rings as an alternative but there are plenty of other interferences that will make that difficult. I have put a call out for our AI to get his views. Any of you out there dealt with something similar?





RE: Vaccum stiffening rings that interfere with nozzles
-MrTank
“I have not failed. I've just found 10,000 ways that won't work.”
-Thomas A. Edison
RE: Vaccum stiffening rings that interfere with nozzles
RE: Vaccum stiffening rings that interfere with nozzles
-MrTank
“I have not failed. I've just found 10,000 ways that won't work.”
-Thomas A. Edison
RE: Vaccum stiffening rings that interfere with nozzles
RE: Vaccum stiffening rings that interfere with nozzles
RE: Vaccum stiffening rings that interfere with nozzles
Some years ago I had to design vessel with rings interfering with nozzles.
I was a trainee at the time. My senior engineer instructed me that stiffening rings shall go through the centre of the nozzle or be completely clear of the nozzle. I don't know where this rule is stated. It may not be a rule and is just good engineering practice.
RE: Vaccum stiffening rings that interfere with nozzles
Good Luck