Design against cracking in ferrous weldments

Abstract The design procedure for the welds in pressure vessels as per nuclear and non-nuclear codes is presented with sufficient background. The design of welds as per non-nuclear code is done by using empirical correlations after choosing recommended weld configurations. As per nuclear codes, design is performed by detailed analysis. The analysis requirements are highlighted with particular emphasis to constitutive material models. The σd procedure for the welds which have creep-like defects, recommended in French assessment procedure RCC-MR Appendix A16, is presented with practical examples. The effect of weld mismatch creep properties on the creep rupture of fossil power plant pipes is quantified by detailed analysis.