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Hey jtseng123 and Dhurjati, Thanks for your time invested on my post. I really appreciate it. In fact, there is a color stress profile. As you see, the maximum stress ocurrs at the lower bracings. ------- I'm now part of the investigation team and what we want is to prevent/avoid this...

Hi Dhurjati, 8 out of 10 primary were found fallen and 6 out of 10 secundary were found fallen. They have an erosion resistant linning. And yes I've been inside the regenerator.

Ohhh Ok. Well Thank you so much George. I hope a mechanical design engineer shows up soon and helps me.

According to ASME VIII 2. Operational Cycle – An operational cycle is defined as the initiation and establishment of new conditions followed by a return to the conditions that prevailed at the beginning of the cycle. Three types of operational cycles are considered: the startup-shutdown cycle...

Another question: Does a cycle finish after a calculated number of hours? I mean, In load Cases 2 and 3 they made the calculations based on 1000hours. Are these 1000hours related to a cycle? Can I say after 1000hours a cycle is finished?

Thanks georgeverghese, In our case the high temps were due to low levels of catalyst and also low levels of feed. I wasn't sure about what a cycle is and when I can say a Cycle is finished. But your post really helped me. Can you tell me where I can find those permissible limits in ASME? I...

Well I don´t think i'm asking a lot. I think I gave a lot of information in order to make it easier to answer my doubts. I only asked 2 questions. The harderest one could be the second one and I'm only asking for guideness. R.A.

Thanks TGS4

Hello, I'm Assessing a failure in the cyclones of the FCCU Regenerator. It is most likely to be related to high tempeture in the cyclones according to the data gotten from the tempeture intruments and according to the findings (sigma phase was found in the rupture zone). I found the design...

Hello, Where can I find the Appendix 4 & 5 of ASME Sec. VIII div. 2? I have 2007 and 2015 versions and I can´t find those appendix

Hello fellows, Can anyone explain me the differences between ASME Sec. VIII div. 1 and ASME Sec. I?

Hello my friends, I'm new designing relief valves, I want to calculate the set presure of a RV, I have read that it has to be lower than the MAWP but ASME Sec. VIII div. 1, allows an overpressure of 10% (in vessels with only 1 RV, 1.-) In which scenario would I want to set the valve with an...

Hello, I'm very confused about these 2 and I really need your help. Pressure Design: If I got the Presure and Tempeture (Operation) how can I calculate the Pressure Design? and Where I can Find this equation in ASME Sec. VIII. MAWP: In UG-27 (ASME Sec. VIII div. 1) they give this ecuation...

Hello Good morning, I'm having an issue evaluating an alternative for a heat exchanger gasket. They offer me to use a gasket with less width (1/2") than the stablished in the original design (5/8") I have searched on ASME Sec. VIII. div. 1 and there's Table 2-4 but I think it refers to the...

Anyone with experience in the design of Leak sealing Devices, specifically Bolted clamps. Bolted clamps 1.-) I want to know the standard that provies me the formulas to calculate the thickness of the body of this device, the bolt sizes and the minimum thickness of the bolted zone - There are...

Good Morning Mr. Deka. I have made the research to get as much information as I can. CASE 1: Didn't have any luck. I'm almost starting over with this, doing the isometric drawings (no exist/couldn´t find them), I'm performing a flexibility analysis with CAESAR II to see if I'm gonna need to...

Thank you so much GD2. I didn't know about the 0.9SMYS. Giving you more information about my cases. CASE 1: We have an old pipeline and we are evaluating if we can use it to supply natural gas to the refinery due to the main pipeline is about to get into a major maintanance. So we're...

Thank you bimr for that good explanation. And thank you all for your answers they really helped me.

As long as the type of failure is not a crack, i'd recommed a path to avoid downtime of the unit

CUI could mostly appears on systems with operation temperatures under 100°C. So, on this systems you have to be always inspectioning that the insulation is proper installed, if not it is probably that water or moisture could leak through the insulation and once there the corrosive attack will...