Hi Richard,

From Caesar Help Menu the WI factor for seam welded is explained like this for B31.1 and B31.3:

"If the B31.1 or B31.3 piping codes are active, select the Seam-welded check box to activate the Wl box. Wl (the weld strength reduction factor) is used by the software to determine the minimum wall thickness of the element."

My question is does Caesar II will calculate the minimum thickness of the element once we input value on WI factor (e.g. 0.85) for B31.1 and B31.3?

Please correct me if my interpretation of the statement in the help menu is wrong.

My thought is that this WI factor will affect the IGE/TD/12 piping code as explained below.

"If the IGE/TD/12 piping code is active, select the Seam welded check box when straight pipes are seam welded. This option affects the stress intensification factor calculations for that pipe section due to seam welded fabrication."

Many Thanks,