Recent content by PVDEngg

Hello gentlemen, Thank you, DriveMeNuts for the reference PD 5500 Appendix G.2.65. It helps with SIF for spheres at-least. Thank you, RaymondN.

@DriveMeNuts: Yes, I was referring to Nozzle local membrane stress relative to general hoop stress, that you explained later in your reply. Thank you. @RaymondN: Thank you. I did check both the references before posting my queries. But still could not decipher it to get my answer, any before...

Most of the available literature refers to VIII-2 Part 4.5 for SIF determination. But, I could not locate the exact information or relevant equation in Part 4.5, using which I could calculate SIF manually. Second reference is PVP-399. Which eventually boils down to VIII-1 Appex 1-10 till 2017...

Thank you for the pivotal reference paper BJI.

Thank you, gentlemen. For your responses and especially, reference to B16 subcommittee C history.

LittleInch, thank you for the reply. It is a notion around and there are couple of sources on internet which mention that B16.5 flanges pressure ratings are established by proof testing or burst testing of flanges. So, if it isn't correct , how are pressure ratings established? Apparently, it...

Hello Gentlemen, According to the (B16.5) 1-21 interpretation, ratings in B16.5 are a result of theoretical analysis with due consideration for experience in application. It did not mention anything about flange ratings being established by 'proof tests' or 'bursting them and adding factor of...

Agree..

Having question "Is it required to use code case 2901 to analyses the nozzle flange" answered with so much of learning, can I add something about 'External loads Applied to Nozzle Standard Flange' per interpretation VIII-1-16-85, which sets basis for evaluation per CC 2901 and can be helpful...

Thank you for to the purpose resolution sir. To conclude this, we can say that these particular requirements from two divisions should not be correlated.

Thanks for your guidance, sir. I shall follow that advise every next time. After you advised, I checked it in PTB-1, it does not mention anything specifically about conditions of applicability as such. It directs to WRC-521, Pressure Area Method Application to Knuckle Joint and stress analysis...

Hello all, Conditions of applicability for using DIV.2 rules for design of toriconal sections 'paragraph 4.3.12.2' are listed in equations 4.3.63, 4.3.64 & 4.3.65. These conditions of applicability are specified in UG-32(g)in DIV.1, together for toriconical heads and sections. Is it coherent to...

Okay, thank you for the clarification.

Thank you Mr. TGS4. Yes, that did answer my question sir. But then what is the best alternative to analyse standard B16.5 & B16.47 flanges 'other than weld neck flanges'? Same equivalent pressure method that is in practice; but without moment factor (considered in CC2901)? Right?

Can I have a liberty to extend the original discussion here? Code case 2901 seems clearly restricting scope of applicability to WELD NECK Flanges, in title and Inquiry statement. Does that mean one can not use same method for evaluating reduced MAWP for Slip-on flanges? what is the intent for...