To determine the fatigue life of the metal bases of pressure vessels, the following steps can be followed:
Conduct a detailed inspection of the pressure vessel to identify any existing cracks or damage.
Determine the material properties of the metal used in the construction of the pressure vessel, including the yield strength and the fatigue strength.
Conduct a stress analysis of the pressure vessel under typical operating conditions to determine the maximum stress that the metal bases are subjected to.
Use the Paris equation or other appropriate fatigue analysis methods to estimate the fatigue life of the metal bases based on the maximum stress and the material properties.
Consider factors such as the effect of cyclic loading, the frequency of inspections, and the expected lifespan of the pressure vessel in determining an appropriate fatigue life.
It is important to note that determining the fatigue life of a pressure vessel is a complex process that requires specialized expertise and should be performed by qualified professionals. It is also essential to comply with relevant industry standards and regulations to ensure the safety and reliability of the pressure vessel.