Quantification of the uncertainty in stress index B2 for pipe bends subjected to out-of-plane bending

► Uncertainty quantification for B2 in the out-of-plane bending mode. ► Monte Carlo simulation along with 3D nonlinear finite element analyses. ► Revision of the code-based expression for B2 using a random variable K. ► Statistics (including CDF) of K for future code calibration. ► Alternative equation to calculate B2 based on regression analysis.