Numerical study for reliability assessment of a corroding pipe to flange weld joint over its lifetime

Numerical model of a corroded weld joint connecting pipe to flange using finite element method was developed, and coupled with usual stress models. The structure material has been characterized experimentally. Monte Carlo simulations, FORM SORM methods have applied for estimating reliability failure probability under corrosion residual effects. A numerical case various rates conducted determine the welded connection flange. obtained results show that heat affected zone is very sensitive effects due welding process.