Indicates whether the piping element is seam welded
B31.1 / 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.
IGE/TD/12
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.