Burst tests of orbital welded austenitic stainless steel (316L) tubes charged in pressurized hydrogen
加圧水素中で充填されたオービタル溶接オーステナイト系ステンレス鋼(316L)管の破裂試験 (AI 翻訳)
Shaanika S, Boellinghaus T, Sobol O, Alweendo T, Johnson O, Schu J, Gugel T
🤖 gxceed AI 要約
日本語
本研究では、水素輸送用途を想定し、オービタルTIG溶接された316Lステンレス鋼管の破裂試験を実施。高圧水素(1000 bar, 150°C, 21日間)で予充填した試験片と非充填の対照群を比較した結果、予充填材の破裂圧力は約2-8%増加し、典型的な水素脆化は観察されなかった。延性破面形態が維持され、グリーン水素用途への適合性が示唆された。
English
Burst tests of orbital TIG welded 316L stainless steel tubes for hydrogen transport were conducted. Precharging in high-pressure hydrogen (1000 bar, 150°C, 21 days) resulted in modest burst pressure increases (2-8%) over controls, with no classical hydrogen-assisted cracking. Ductile fracture morphology was retained, supporting material compatibility for green hydrogen applications.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本は水素社会の実現を目指しており、水素輸送インフラの安全性は重要課題。本研究成果は、水素ステーションやパイプラインの材料選定に直接的な知見を提供し、GX実現に向けた技術的基盤強化に貢献する。
In the global GX context
This paper provides experimental evidence on the hydrogen compatibility of welded 316L stainless steel, a common material in hydrogen infrastructure. The results support the safety and reliability of hydrogen transport systems, which is critical for scaling up the global hydrogen economy under GX initiatives.
👥 読者別の含意
🔬研究者:Materials scientists studying hydrogen embrittlement can use these data to validate models and guide alloy selection for hydrogen service.
🏢実務担当者:Engineers designing hydrogen pipelines or storage systems can leverage the findings to qualify welding procedures and ensure safe operation.
🏛政策担当者:Regulators developing hydrogen safety standards may consider this study as evidence for permitting welded 316L tubes in high-pressure hydrogen applications.
📄 Abstract（原文）
<title>Abstract</title> <p>Orbital TIG welding is extensively used to weld tube to tube in many industries such as food, chemical oil and gas. Nowadays, applications in hydrogen transportation remains an interesting challenge due to the material susceptibility to hydrogen assisted cracking. Hydrogen can be introduced to the material during welding, fabrication or in-service as tube may be exposure to harsh environment that can be classified as internal or external hydrogen sources. In this study, a 316L (1.4404) cold drawn 1/2"(12.7 mm OD) and 3/8" (9.53 mm OD) tube with 0.5 mm wall thickness was investigated. Cold drawn tube sections were machined into hollow orbital welded specimen. Experimental assessment of burst testing of the welded specimens was performed and comparison of the high-pressure gaseous hydrogen autoclave precharged (1000 bar, 150°C, 21 days) and non-precharged (controls). Precharged specimens showed modest increases in burst pressure (≈ 2–8%) relative to controls. Hydrogen degradation index was determined to quantify the susceptibility of material in the investigation conditions. Fractography revealed a ductile fracture morphology with coarser dimples, larger microvoids and secondary cracks present in the precharged specimens. Within the limits of the present replication, the data suggests that under the tested extreme charging condition 316L tubing retained burst capacity and did not exhibit classical hydrogen assisted cracking. The findings contribute to the understanding of compatibility of welded austenitic stainless steels for the green hydrogen applications.</p>
🔗 Provenance — このレコードを発見したソース
- Research Square https://doi.org/10.21203/rs.3.rs-9692809/v1first seen 2026-06-04 04:25:28 · last seen 2026-06-15 04:42:27
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