Mr. Mathan,<br>
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Since you are dealing with a pressure vessel nozzle and head, I suggest you first look at Appendix 5 of the ASME Code Section VIII, Division 2. Appendix 5 contains fatigue analysis design criteria.<br>
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Vince Carucci
They are definitely Italian steel designations, but I don't have the strength properties or US equivalents handy. Perhaps checking in an ASM handbook or contacting an Italian exchanger or vessel manufacturer would get you the strength data you need.
API 653 provides the owner-user a fair amount of latitude re: the extent of inspection that is done on aboveground atmospheric storage tanks. I'm curious how folks have used their local experience to come up with the extent of inspection that is actually done on particular tank shells and...
Just a couple of more thoughts. All things considered, some form of the "thermal isolation" idea might be the surest bet. Using insulating refractory to reduce metal temperature is commonly done in certain high tempearture refinery applications, but we're normally dealing with much higher...
I guess we're all making the basic assumptions that the flange has been "properly" designed per ASME Code procedures for the gasket and bolting being used and that there is no facing damage that could aggravate the problem. Here are some ideas to consider.<br>
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When you torque in the "star"...
Aside from the other responses, I also tend to think of "tubes" with respect to heat exchanger or process heater applications, or as parts in instrumentation pneumatic or hydraulic systems. Pipes convey fluid from one equipment item to another.
Yes. The temperatures are not all that high though. With proper flange, gasket, and bolting design and boltup procedures, we seal flanges in refinery applications at 800F and more. I initially suspect that there is a boltup procedure or gasket design/installation problem. How long has the...
