Requirements for materials in wet hydrogen sulfide Class II environments
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In HG/T20581-2020, requirements for HIC resistance in hydrogen-resistant plates are specified for wet hydrogen sulfide Class II environments. But in a single device, there are also nozzles, flanges, etc. – do these also need to undergo hydrogen-induced cracking tests? What is the basis? Thank you!
In wet hydrogen sulfide Class II environments, in addition to the requirement for HIC resistance in the plates, components such as pipes and flanges also typically need to undergo hydrogen-induced cracking tests. The standard adopted is HG/T 20581-2020, which covers the material requirements for various pressure equipment used in environments containing hydrogen sulfide. The standards specify that all metal materials that may be exposed to environments containing hydrogen sulfide should be subjected to appropriate tests for resistance to hydrogen-induced cracking, in order to ensure the safety and reliability of the equipment. .
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