Indicates the longitudinal (axial) SIF (ia) value on a bend or at an intersection.
Specify this value for any point in the piping system by selecting the SIFs & Tees on the Classic Piping Input Dialog. Type the node number to which the SIF applies. Then, specify the Axial SIF (ia) value on the SIFs/Tees auxiliary tab.
The B31.3 code indicates that, in the absence of more applicable data, the Axial SIF (ia) value is 1 for elbows, pipe bends, and miter bends. The ia value is the same as the Out-Plane SIF (io) value for all other components.
For more information on stress intensification factors (SIFs) in CAESAR II, see Stress Intensification Factors and Stress Indices Details.