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Thanks so much to all of you for your replies. They have been most helpful. In this case the client has dictated that the entire vessel will be clad/overlaid. Perhaps the more overriding question (the answer to which may have been alluded to) is: Since the entire vessel will be clad/overlaid...

Initially the cladding was specified as 304L SS. With the requirement of PWWHT added, and considering the high temperature for PWHT, apparently this was the reason for specifying 347SS cladding. The puzzling question for me is still why the need for PWHT unless there is a concern about loss or...

It has been proposed that 347 SS clad carbon steel plate be used for fabrication of a MEA regenerator vessel which is considered as also being in alkaline service. Hence, a metalurgist has specified that the competed vessel must receive PWHT. Is PWHT required or even desired for this column?

Thanks so much. You are correct. In the past we have only used this material for Appendix 2 flanges that had a design temperature of 1015F to get a slightly higher allowable.

Why does Compress not allow the option of using SA-182 F22 Class 1 Long Weld Neck Flanges as a material choice?

A NPS 2, set-on nozzle (Figure PW-16.1(a)) is being installed on a Steam Drum Head. Neither PG-38 nor PG-52 applies. The AI is asking for weld path strength calculations. Such calculations show that the nozzle fails following Figure PW-16.1(a). Is it the Code's intent that these calculations...

Thanks TGS4 for your reply. You provided the clarification that we were seeking.

Is it appropriate to apply the criterion of ASME Section VIII, Division 2 paragraph 5.5.6.1(d)(2) to vessels built prior to the 2001 Code Edition? (If I am correct this additional requirement was added in 2001.) For rerating existing equipment we follow API-510. For analyses of loadings on...

marty007 is correct. Compress utilizes Paulin Research Group's software to perform the FEA. Paulin, in their literature, does not recommend calculating stresses in fillet welds because of the inaccuracies involved. As marty007 has pointed out, only peak stresses are of interest for fillet...

Although deflection of tank nozzles may be of some interest during design we evaluate tank nozzles based on stress and use FEPipe (in conjunction with Caesar 2) which quickly, easily, and accurately performs the calcuations on the basis of ASME Section VIII, Division 2 criteria. Granted there...

I would suggest that you contact the WOL manufacturer and ask them your questions. They are in the best position to give you an answer.

Since your part is only 12" long could you purchase a 7" diameter forging and have it bored to the required ID? In the end this may be more economical and you would end up with a component that would meet some standard such as A-105 or whatever the required metallurgy would be.

Model the leg as a nozzle using the orientation menu to create the proper offset. Use the optional menu to not remove the nozzle opening in head.

If you have never rated or rerated a pressure vessel I would suggest you hire someone who is knowledgable in this regard. If wish to proceed yourself then first determine if your jurisdiction accepts API-510. If so this standard will guide you in establishing material properties for your...