{"id":24518,"date":"2025-04-10T15:39:43","date_gmt":"2025-04-10T13:39:43","guid":{"rendered":"https:\/\/www.korea-certification.com\/?p=24518"},"modified":"2025-04-10T15:45:15","modified_gmt":"2025-04-10T13:45:15","slug":"new-kgs-standard-for-hydrogen-vehicle-composite-cylinders-finalized","status":"publish","type":"post","link":"https:\/\/www.korea-certification.com\/en\/new-kgs-standard-for-hydrogen-vehicle-composite-cylinders-finalized\/","title":{"rendered":"New KGS Standard for Hydrogen Vehicle Composite Cylinders finalized"},"content":{"rendered":"\n

At the end of March, the Gas Technology Standards Committee held its 162nd meeting and approved some amendments for the finalization of the new KGS AC421 standard for compressed hydrogen composite cylinders used in vehicles. This new standard is part of Korea\u2019s ongoing efforts to enhance the safety and performance of high-pressure hydrogen storage solutions. Pressure Vessels usually require KGS factory registration<\/strong><\/a> to be approved for import and sales on the Korean market.<\/p>\n\n\n\n

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\"\"<\/figure>\n<\/div>\n\n\n

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The newly drafted KGS AC421 establishes comprehensive requirements for the manufacturing, design, materials, structure, heat treatment, performance testing, and labeling of composite hydrogen cylinders intended for use in transportation.<\/p>\n\n\n\n

One of the major changes concerns the cylinder design life. The wording was revised from \u201c15 years or less\u201d to a \u201cminimum of 15 years\u201d to align design specifications with the legal operational limits. This ensures a consistent approach between cylinder design and usage throughout their service life.<\/p>\n\n\n\n

Furthermore, foreign certification recognition criteria were clarified under KGS AC421. Specific accepted foreign standards and inspection bodies, such as ANSI (USA) and ECE (Europe), are now clearly listed. This provides better transparency and allows for the recognition of foreign-manufactured cylinders without requiring additional inspections.<\/p>\n\n\n\n

The manufacturing facility requirements have also been updated. The requirements for heat treatment furnaces were revised to match the criteria already defined in KGS AC411 for aluminum liner composite cylinders. Furnaces must now be designed to limit internal temperature variations to within 25\u00b0C and must be equipped with automatic temperature recording devices to ensure precise heat treatment control.<\/p>\n\n\n\n

Testing procedures have been strengthened. The material used in environmental and pressure tests must now be strictly a “liquid” rather than a general “fluid,” eliminating ambiguity regarding the test medium in low-temperature environments. Additionally, KGS AC421 introduces new hydrogen compatibility testing requirements for metallic liners. These tests, based on ASTM G142, verify the suitability of materials under high-pressure hydrogen environments. The acceptance criteria have been harmonized with those found in KGS AC111, ensuring consistent performance expectations across standards.<\/p>\n\n\n\n

Inspection requirements were also expanded. In this latest version, external appearance inspections have been introduced, and the sampling methods for dimensional checks, liner tensile and impact tests, protective coating adhesion, and burst tests have been clearly defined. These enhancements strengthen the quality control process during production and improve overall product reliability.<\/p>\n\n\n\n

The committee concluded the meeting by approving all remaining amendments to the detailed standards. A timeframe for the formal implementation of the new KGS code KGS AC421 has yet to be officially announced.<\/p>\n\n\n\n

Feel free to contact us any time if you need assistance or have any questions regarding Korean certifications like KC<\/strong><\/a>, KC EMC<\/strong><\/a>, KCs<\/strong><\/a>, KCs for explosion safety products<\/strong><\/a> or KGS factory registration<\/strong><\/a>.<\/p>\n\n\n\n

Tel. Europe: +49-69-271 37 69 259
<\/strong>Tel. US: +1 773 654-2673<\/strong><\/strong><\/p>\n\n\n\n

Email: info@korea-certification.com<\/strong><\/a><\/strong><\/p>\n\n\n\n

For more information you can download our free brochure “Korea Certification Made Easy – The Booklet<\/strong><\/a>“.<\/p>\n","protected":false},"excerpt":{"rendered":"

At the end of March, the Gas Technology Standards Committee held its 162nd meeting and approved some amendments for the finalization of the new KGS AC421 standard for compressed hydrogen composite cylinders used in vehicles. This new standard is part of Korea\u2019s ongoing efforts to enhance the safety and performance of high-pressure hydrogen storage solutions. […]<\/p>\n","protected":false},"author":8,"featured_media":24414,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[110],"tags":[],"class_list":["post-24518","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-regulation-news"],"acf":[],"yoast_head":"\nNew KGS Standard for Hydrogen Vehicle Composite Cylinders Finalized<\/title>\n<meta name=\"description\" content=\"At the end of March, the Gas Technology Standards Committee held its 162nd meeting and approved a number of amendments to finalize the new KGS AC421 standard.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.korea-certification.com\/en\/new-kgs-standard-for-hydrogen-vehicle-composite-cylinders-finalized\/\" \/>\n<meta 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