Dear Members,

Some opinion said that "WRC107 is used widely in design nozzle attachment cover both spherical and cylindrical vessels, while WRC297 is only cover cylidrer to cylindrical only(not applicable for nozzle on semi ellips head."

Just to confirm that statement above correct or not. if correct how to make comparison between WRC107 and WRC297 .

appreciate could anyone explain deeply to me.

thank.

_________________
Faizol
(PV-elite User)

Bulletin 107 applies to circular and rectangular attachments to cylindrical shells, and to circular and square attachments to spherical shells. Curves are provided in the bulletin to address some hollow circular attachments but this data is more limited than that for solid circular attachments.

Bulletin 107 determines stresses on the inside and outside surface of the shell at four cardinal points. These correspond to the longitudinal and circumferential planes for a cylindrical shell. Note that the bulletin determines stresses resulting from loads on the attachment and does not consider stresses resulting from pressure; you must superpose the stresses due to pressure to combine with the stresses from external loads. Bulletin 107 considers flexibility of the shell but the attachment is considered to be a rigid attachment. The result is that no stresses are calculated for the attachment (which itself may be a nozzle neck).

Bulletin 297 is a "Supplement to WRC Bulletin No. 107", as indicated in the title of this bulletin. This bulletin treats local stresses in cylindrical shells due to external loadings on nozzles. Only cylindrical nozzles are treated. The bulletin considers the flexibility of both the shell and the nozzle and determines the stresses in both. The calculated stress is at the same four cardinal points used for bulletin 107. If I remember correctly (and it is too early on a Monday morning back-to-work for me to quickly find this information in the bulletin), the stresses are found for points at the midplane of the plate.

Bulletin 297 provides curves (data) for nozzle and shell diameter combinations that are outside the scope of bulletin 107.

Information (and ordering) on the WRC bulletins can be obtained from the website for Welding Research Council. See http://www.forengineers.org/ and search for the bulletins.

Dear Tom,

Sir, I have one nozzle at ellips head, so that mean i can perform WRC 107 only and cannot perform for WRC 297. I'm correct?.

_________________
Faizol
(PV-elite User)

That appears to be correct.

Dear Tom,

Thank you Sir, you have copy (pdf copy) for Buletin WRC 107 & WRC 297?. appreciated if you could send to me. my email is faizol@mset.com.my

Thank you.

_________________
Faizol
(PV-elite User)

Dear Tom,

Really appreciate your answer to this topic. I am engaged to some work corresponding to pressure vessel design. I am a beginner yet. I hope to get one WRC 107 calculation procedure in pdf. if you have that, could you be kind to send me one copy? Thanks & Regards!

sorry for my missing email: huaji_zhang@163.com. Thank you!!