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The research aims to define a protocol for assessing the damage tolerance of natural gas pipelines repurposed for hydrogen service.

January 18, 2026MetalsOpen Access

The Influence of Microstructure on Decisions Regarding Repurposing Natural Gas Pipelines for Hydrogen Service

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The research aims to define a protocol for assessing the damage tolerance of natural gas pipelines repurposed for hydrogen service.
Established heat treatments to create microstructures relevant to X46 type steel welds.
Conducted comprehensive microstructural characterization of weld samples.
Fabricated standard compact tension specimens from treated steel sections.
Tested specimens in hydrogen to measure fracture toughness.
Fracture behavior varied significantly across different microstructures.
Testing only base metal provided non-conservative information regarding performance.
Data from experiments was crucial for developing structural integrity assessment models.

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Empirical analysis reveals the impact of microstructure on hydrogen service performance in pipelines, suggesting refined assessment methods.

Parker et al. (2026) studied this question.

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Empirical analysis reveals the impact of microstructure on hydrogen service performance in pipelines, suggesting refined assessment methods.