The paper focuses on the global exploration of renewable energy solutions to reduce carbon emissions, with a specific emphasis on hydrogen transportation. India’s energy goals and economic challenges related to fossil fuels underscore the significance of hydrogen. Its applications range from fuel usage, either independently or blended with natural gas, to serving industries like fertilizers. The presence of hydrogen can deteriorate steel pipes, welds, valves and fitting through a variety of mechanisms including diffusion of hydrogen into steel matrix causing “Hydrogen Embrittlement”. Damage caused by Hydrogen leads to cracking, blistering, reduction in mechanical properties and an increase in fatigue crack growth rate. The risk increases significantly in high-strength steel used in pipelines at higher stress levels. While hydrogen pipelines exist internationally, they face limitations such as pressure, diameter, and steel selection. ASME B 31.12 incorporates design parameters considering potential threats. Hydrogen’s interaction with pipeline materials can lead to “Hydrogen Embrittlement,” causing structural degradation, cracks, and reduced mechanical properties, particularly in high-strength steel. Repurposing existing natural gas pipelines for hydrogen transport proves more cost-effective than constructing new infrastructure. The paper assesses ASME B 31.12 criteria for hydrogen transport, comparing them to gas pipelines. The standard’s recommendation for sampling per kilometer for suitability evaluation presents challenges. The study introduces a Bayesian-based statistical model, involving in situ metallography at select locations, and correlates steel properties with metallography outcomes to evaluate fracture toughness. This methodology offers an alternative means of converting natural gas pipelines to hydrogen service.