Recent developments in the energy sector, driven by concerns on global warming, have triggered the energy transition especially within fossil-fuel based energy systems. Within this framework, Baker Hughes (BH) is designing new equipment to operate more efficiently, cleanly, and sustainably. To better understand the product requirements, research within the company databases has led to a better and more contemporary understanding of the expected operating profile of the equipment in real use. Two representative components of a new machine under development have been selected for a deeper analysis. This master’s Thesis focuses on the fatigue limits of these two components with limited life, part of a complex machine in use in the field of power generation.