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Strong technical knowledge is what you need. Ronak Patel has mentioned several books that I already have and studied through my entire career. Two more for your references if you can still find them. - Pressure Vessel Systems, a user's guide to safe operations and maintenance, by Anthony Kohan...

Sold metal plugs was used in lieu of grease in the past, if any people here old enough to know that. For uninsulated vessel, hey, plug is better than grease. Due to weathering, grease will be gone and who will run the risk of falling to re-grease any vent hole. Think before making your comments...

We need AI to read the code, feeding your sketch and question, and provide answer including where the code says right away, instead of so many people wasting time here digging out what in the code or your own interpretation on the code. I got tired of this.

Krausen, Cumo, both of you are exactly correct. Vent hole is for vapor to escape to avoid hydrogen induced cracking from the welding as well as other harmful particles from the welding process. The hole is also so call Tale Tell Hole for a reason. I had a Russian project years ago, and client...

Your question is vague. Template is for construction to set the anchor bolt locations correctly to match the hole on skirt base ring. It is not mandatory as long as your buyer is not asking. But you shall ask if they need it. Here is what we do in every project: For skirt supported vertical...

We do solution annealing on all P8 formed head to remove residual stress due to past experience of cracking head in ethylene plant. It can either be the entire head solution annealed or only solution anneal the formed segments to remove residual stress due to forming. The final assembly welding...

Kwisatz, I also have such baffle in a "double-pipe" jacketed loop reactor. Those little baffle is to divert the flow, and only with very light weld, shall not be considered in any strength analysis, not to think it will play major benefit to the shell. Engineering judgment is to ignore its...

Interesting. I also have jacketed vessel (with half pipe and internal agitator). As other people said, check your calculation for external pressure due to the jacket design pressure. Most likely this was missed. In addition, internal force by the agitator due to the liquid viscosity and the...

Its wording "may be" is the key. That means, you decide and take the consequence. We ask vendor to grind/polish to reveal any defects beyond it, and do surface MT/PT. So it is your call.

I have gone through this on many new vessels due to extreme poor quality from shop. We did repair pitting and porosity. Attached is our action on each problem on several vessels. You shall be able to find one that fits your case. If pitting on plate, grind smooth the pitting and MT or PT the...

chaulklate, Give me your MAWP, design temp, flange material, axial pulling out force (not pushing in force) and bending moment at the face of flange. The loading must be from CAESAR II pipe stress analysis for the loading at the FOF, not at the shell junction. You can give me the final...

Equation in UG 44(b) is the first place to do as it is already stipulated by code in lieu of the old code case 2901. DO that simple analysis by having your bending moment and pulling out axial force (if force is pushing into the flange, ignore the force). Also ignore shear force and torsional...

Some many times in this forum and one more time for you: please stop analyze standard flange using Appendix 2. The only reference is pressure-temperature rating table. Nothing beyond that for standard flanges which have been in the world for more than 50 years. Don't waste your time and other...

I did conduct interview for potential vessel engineers. I probably the only one in the world giving every candidate 3 pages with 60 technical questions and a full 90 minutes interview, instead of verbally BS talk. I scared people a lot. However I know what level they are and place in the right...

As I have dealt with revamp with vessels using 1960's code and with so called 212 boxed material (B for "boxed" if my memory serves correctly.), be cautious of the following: 1. It already exceeds the normal design life of 20-30 years. You are running tremendous risk of failure regardless how...

1. Torsion in 99% of cases will not produce significant stress on vessel body or even flange. Therefore it is negligible in flange rating or even in Appendix 2 analysis, and can be ignored in the vessel design including skirt. That is why no torsion input in PV Elite on the shell. If you want to...

r6155, you probably has not done many as I have done in the past 30 years for so many big oil companies around the world, US, south America, China, Russian, Singapore, Mexico, Middle East, etc. I don't think I need to reply to you.

EngineerEPC, Good question you are asking me since I dealt with many tangential or hill sided nozzles, some are very big. It can be either in circumferential direction or longitudinal direction. From Fig 37.1, the key is the sized of the opening. Pick tangential(circumferential) nozzle for...

Nothing left to do in office in this Friday afternoon, so here we are. You can disagree if you have better technical insights. Code already addresses this issue, but most people can not reason it from the code. See Figure UG-37, Figure UG-37.1, and the definition of “F”. Using the most simple...

Due to low pressure, slip-on type flange will be your best choice if no process concern. In your case you do not need to use forging material, flange from plate won't cause any issue. Your flange thickness 6.25" in my opinion is excessive, compared with my case at 1450F, 5 psig and 108" dia with...