Dear Richard/Dave.

Using CAESAR-II version 5.3.1 based on ASME B 31.3 2008 Code.
In CONFIG FILE I selected the option of considering the WELD STRENGTH REDUCTION FACTOR (Wc) in the anlaysis.

Problem 1 : I Considered a material A 335 P11 Temperature 538C. I didn’t inputted any value/ I left blank for WC when a tee is defined.

In this case there is no change in the allowables for sustained stresses for TEES, BENDS, REDUCERS etc.. (I mean whereever circumferential welds are there).

But I checked in ASME B 31.3 2008 Code in that table Wc Value is 0.82. then why CAESAR-II is not considering that value. I made any mistake.

Problem 2: If I input the WC value when a tee is defined then CAESAR-II is considering that WC values for only TEES.. what about BENDS, REDUCERS etc..

Problem 3 : Why the option(Entering the value of WC) is only given at defining TEE region. Why not for BENDS, REDUCERS etc.. Is there any particular reason.

Please correct me if Iam wrong.

Any comments..

Can You please clarify this doubt..

Specify W for circumferential welds on bends (our Wc) as part of the SIFs & Tees auxiliary data. [Error in original post incorrectly stated that Wc for bends is specified as Bend auxiliary data.]

Sir Dave.

Thanks for your Reply.

I did n’t find any option to enter WC value when I specifying the bend.( in bend auxiliary data.)

But I really surprised, (from 2008 code) Till now what I think, if User selects “use WC option” in config settings then CAESAR-II is automatically considers WC factor from the table 302.3.5. and if user changes WC factor then CAESAR-II will overrides and use the USER DEFINED value.

Is it pratical to define WC value in TEES, BENDS & REDUCERS. If the system is big consists of more bends and TEES of different temperatures & materials, more chances of mistakes, why not CAESAR-II considers this value Automatically.

Pl correct me If I am wrong..

So sorry. The W to be used for bend circumferential welds is defined as "SIFs & Tees" Auxiliary Data. I'll go fix my post now.

Thanks for ur reply sir.

But is it pratical to define WC value in TEES, BENDS & REDUCERS in sif auxillary data. If the system is big consists of more bends and TEES of different temperatures & materials, then for every bend I have to define wc value based on my temp and material ?, why not CAESAR-II considers this value Automatically. Whats the problem of taking these values automatically..

Sir Dave.
Thanks for your Reply.

Question: 1

I considered A691 1CR Material (NUMBER 373),

when I am using CAESAR-II 5.3.1 version . I Checked the W values. ( 0.0703, 0.0667, 0.0639, 0.0604, 0.0576, 0.0541 etc…) in material data base editor And the same file I opened in CAESAR-II 6.0 version then the vaue of W is changed (1, 0.95, 0.91, 0.86, 0.77, 0.73 etc..) why?

I think Unit conversion: 0.0703048 Kg/cm2 = 1 Psi But W has no units. Can you please clarify me.


Question: 2

I consider a material A 335 P11 based on code ASME B 31.1 , it is showing the value of W in material data base but when same material I select the ASME B 31.3 CODE in that W values are not considering , why CAESAR-II providing WC values for some materials only WHY?? ( providing in 31.1 and in 31.3 it shows blank)

Any comments ?

You are correct, the unit conversions are being applied to the Wc values from the database in Version 5.30/5.31. This issue has been corrected in Versions 6.10 and 7.00.

Type in the value of Wc you want to use.