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This is a Quantitative Study study.

October 10, 2025

Fatigue Analysis of a Hydrogen Pressure Vessel Using ASME BPVC VIII-3 KD-10 and Comparing With the Results of VIII-3 KD-322 Using Degraded S-N Curves

Key Points

The study highlights the fatigue analysis of a hydrogen pressure vessel using ASME BPVC KD-10 guidelines.
Results indicate that S-N curves dependencies provide a reliable approach for estimating fatigue lifetime in hydrogen environments.
Using a degradation factor of 125.5 allows for an accurate prediction of fatigue lifetimes in high-pressure applications.
A MATLAB Curve fitter was utilized to develop a degradation function that enhances fatigue estimations for HSLA steel in hydrogen.

Abstract

Abstract Stationary pressure vessels for the storage of large volumes of gaseous hydrogen at high pressure (700 bar) are typically manufactured from Cr-Mo steels. The way to calculate their fatigue lifetime is the fracture mechanics approach using ASME Boiler Pressure Vessel Code Section VIII Division 3 Articles KD-10 and KD-4. In this work, in addition to the use of this conventional approach for a hydrogen pressure vessel made of SA-372 Grade J, Class 70 Steel, also ASME Boiler Pressure Vessel Code Section VIII Division 3 Article KD-322 (S-N curves) is used to calculate fatigue lifetime of the vessel made of High Strength Low Alloy (HSLA) steel after considering an upper bound degradation factor of 125.5 times. In order to have a better estimate of the fatigue lifetime of the subject material in hydrogen in certain pressure cycles using S-N curves in air, a degradation function is developed by MATLAB Curve fitter which can 100% predict the results of fracture mechanics approach for design lifetime in hydrogen using S-N curve in air as a guideline.

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