{"id":1754,"date":"2023-04-12T02:30:00","date_gmt":"2023-04-12T00:30:00","guid":{"rendered":"https:\/\/as-schneider.blog\/?p=1754"},"modified":"2023-05-24T06:34:47","modified_gmt":"2023-05-24T04:34:47","slug":"is-hydrogen-embrittlement-a-threat-to-valves","status":"publish","type":"post","link":"https:\/\/as-schneider.blog\/2023\/04\/12\/is-hydrogen-embrittlement-a-threat-to-valves\/","title":{"rendered":"Is hydrogen embrittlement a threat to valves? Get the answer here! [Part 1 of 4]"},"content":{"rendered":"\t\t
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Is hydrogen embrittlement a threat to valves? Get the answer here! [Part 1 of 4] <\/h1>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Germany is hard at work on becoming a decarbonized region. The country found a scalable solution in hydrogen that favors all parts\u2014the environment, citizens, and industries. To get the H2 initiative started, the government, with the help of the scientific community, is developing several macro projects. The first phase focuses on blended operations that lead to the controlled addition of hydrogen into the existing natural gas grid infrastructure.<\/strong><\/p>

Under such a novel context, it is natural to inquire about the potential implications of gas blending. How can the addition of hydrogen affect the existing systems? Is hydrogen embrittlement of materials a possibility? What are the causes? How to prevent it? These are rather important questions raised by plant operators. So, as valve manufacturers, AS-Schneider felt committed to taking action and finding answers. We sent our team to a one-on-one meeting with specialist Dr. Brian Kagay. His work in the prestigious Materials Testing Institute at the University of Stuttgart qualifies him as an expert in this subject. If you are a plant operator, you don’t want to miss out on what he had to say.<\/strong><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Table of contents:<\/strong><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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\u00a0 \u00a0I. Part:<\/span> >> Hydrogen embrittlement of valves and what it means.<\/a> <<<\/span><\/strong><\/p>

\u00a0 II. Part:<\/span> >> Causes of hydrogen embrittlement in valves.<\/a> <<\u00a0<\/span><\/strong><\/p>

\u00a0III. Part:<\/span> >> Effects of hydrogen embrittlement on different valve materials.<\/a> <<<\/span><\/strong><\/p>

IV. Part:<\/span> >> Hydrogen embrittlement prevention & control.<\/a> <<<\/span><\/strong><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Hydrogen embrittlement of valves and what it means<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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In part I of this hydrogen embrittlement series, our conversation with Brian Kagay focused on the effects of hydrogen on valves and their metallic structure. Though, not first without touching the ground on his journey as a specialist in the field.\u00a0<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Hi, Brian. Can you give us a little bit of background on your journey as a hydrogen embrittlement specialist?<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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It all started in undergrad school at the University of Florida\u2014I\u2019m originally from the United States. There, I studied Materials Science & Engineering. Then, I went to the Colorado School of Mines for my Ph. D. as part of The Advanced Steel Processing & Products Research Center, focusing on the hydrogen embrittlement of nickel-based alloys. Afterward, I moved to SANDIA National Laboratories in Livermore, California, where I joined the Hydrogen Effects on Materials laboratory. At SANDIA, I studied \u00a0H2 effects on stainless and carbon steel materials. And now, finally, I\u2019m at MPA (Material Testing Institute University of Stuttgart) as a scientist and researcher to study the effects of hydrogen on metals. It\u2019s been a busy and ever unfolding road.\u00a0\u00a0<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Moving onto the subject. What is hydrogen embrittlement?<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Hydrogen embrittlement is the decrease in ductility of a material due to hydrogen. The condition appears when the hydrogen concentration raises over the limit acceptable by the material. The signs include loss of tensile ductility, fracture toughness, or fatigue life. When the H2 level is too high, it decreases the stress required to form cracks, thus, leading to fracture or premature failure of the material.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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What are the types of hydrogen embrittlement?<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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There are two main forms of hydrogen embrittlement that occur when stress is applied to a material:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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