Hello everyone,
I have two doubts regarding SIF.
1.What happens If I overwrite the Inplane and Outplane SIF values and didnt give any connection type? Will it create a error?

2.CII is using exact section modulus or Approximate section moudlus (pi*r*r*t)??

Thanks in advance

1. CAESAR will happily use the values you supply instead of calculate any itself.
2. I would be inclined to think Intergraph would first use whatever the code specifies, and when deficient, thick-walled cylinder section modulus, adding in mill tolerance. However, I'll defer to Intergraph.

Dear Michael,
Thanks for your reply.
1.I read about CII SIF definition in "Nozzle Pro Help" document. It says if we didnt give any connection type, then we should define the direction of inplane and outplane moment.
Below i have attached a snap from Nozzle Pro help for your reference!
2. Could you please explain about "Reduced Intersection" option in "SIFs and Stresses" tab from Configuration file.Please refer the image shown below.

Thanks in advance

1. Correct. In-plane moments in the supplied screenshot is to rotate the branch connection up and down. Out-plane moments in the supplied screenshot is to rotate the branch connection in the horizontal plane.

2. Here's what the help says. I can't really add more to it.

•B31.1 (Pre 1980) - Use the pre-1980 B31.1 code rules used for reduced intersection. These rules did not define a separate branch SIF for the reduced branch end. The branch stress intensification factor will be the same as the header stress intensification factor regardless of the branch-to-header diameter ratio.
•B31.1 (Post 1980) - Use the post-1980 B31.1 code rules for reduced intersections. The reduced intersection SIF equations in B31.1 from 1980 through 1989 generated unnecessarily high SIFs because of a mistake made in the implementation. (This is according to WRC329.) For this reason, many analysts opted for the pre-1980 B31.1 SIF calculation. CAESAR II corrects this mistake by automatically setting B31.1 Reduced Z Fix to True (the default setting). You can vary the status of this flag in the CAESAR II configuration file to generate any interpretation of B31.1 that you want. The default for a new job is for B31.1(Post 1980) and for B31.1 Reduced Z Fix to be set to True.
The No RFT/WLT in Reduced Fitting SIFs option also affects the SIF calculations at reduced intersections.

To read this help file in its entirety, select the option as though you're going to change it, and then hit F1.

1. if I remember well, it will have some impact on flexibility.