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Thank you for your help. My opinion regarding tube to tubesheet joint is similar but I would to compare it before I present it to our client. Regards Arti

Dear All I have two questions in the filed of interpretation of ASME. Now we design heat exchangers working in lethal services, in meaning of ASME VIII Div. 1 UW-2 (a). Acc. to data sheets, exchangers shall be BEM type and for that we chosen corner joint type “i” of fig. UW-13.2. Such solution...

thank you for help.

Dear All could you be so kind and help me in following problem. We have to use seamless tubes T23 which are listed in material specification ASME II part A SA-213. But we can't find specified allowable stresses in ASME II part D table 1A. Without these values we can not perform strength...

Thanks DSB123 for answer. Regarding answer to question 1, no doubts. Regarding question 2, it is true that in reinforcement calculation allowable stresses are not necessary, but they are used to determine minimum wall thickness of pipe and branch, what have direct influence to reinforcement...

Hi All. Before i get a questions, small introduction to subject. Now I’m working in some project of main steam pipelines which are designed and manufactured according to European standard EN 13480. Due to fact that this standard dose not allow to design straight tees in creep range my...

Thanks all for opinion. I absolutely agree with you SnTan, the configuration is strange. But i have met many times tubesheets with relief groove but never with tubes go across it. The sketch shows our first design assumption but of course it will no change much later. I thing that we reduce...

Thanks for replay, please find attached sketch for better understanding. I will ask client to send me previous documentation approved by authority. This is not only problem of strength calculation but also problem of manufacturing, tubes shall be also expanded. FEA analysis is only one way to be...

Hi BPVFEA and thanks for your opinion. I have done in same way as you proposed. I have askesd client to confirm such design and his good experiance in this, but i have only received answer: Yes, we have used such solution in the past and our experiance is good. But such answer dose not...

Hello everyone I have a question referring design/construction of shell and tube heat exchanger. Dose anybody meet in own design practice bellow described design case: Shell and tube exchanger with stationary/fixed tubesheets with relief grooves at connection between tubesheets and shell./...

Thanks All for help. I was thinking exactly as jamesl said. To be on safe said we can use Div. 2 methodology not allowable stress.

Thanks for your help. Of course all this I found in ASME Div.1 and is more or less clear for me. But I probably do not precisely describe my problem. My client said that for shell and pad material which is SA-516 60 I should use in calc. allowable stress in design temp. given in table 2A Sec...

Hi all, I need a help in below matter. I try to find on forum an answer but I can’t. The whole vessel is designed acc. to ASME VIII Div.1.During calculation I found that some nozzle did not fulfill requirements of WRC107, (the stress are exceeded at reinforcing pad edge for Pm+Pl+Q (total)). I...

Hello I make design of pressure vessel with dimpled outside shell for which design pressure is specified in data sheet at 0.75 MPa. Design pressure for inner shell is 0.45MPa. Inner shell is partially covered by dimpled shell two times distance of 1000 mm. The length of inner shell is 3700 mm...

Hello M1Can Please correct me, but I understand that the nozzle is located in such a way that its opening is exactly through knuckle area. If it is, you can not made standard reinforcement calculation, because nozzle is located in discontinuity of the head and therefore it is necessary to reduce...

Thanks for Your answers From my designer experience, I have always checked even standard flanges. And if the result of analysis has been unacceptable I have choose flange from upper rating class. But now my client request only design base on rating calculation, therefore I have some objections...

Good day Everyone I have a question referring to flanges acc. to ASME B 16.5. According to point UG-44 of ASME VII Div.1, if flanges, gaskets and bolts fulfilled requirements of listed there standards, is enough to choose flanges only based on calculated pressure-temperature rating in referring...