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Hydrogen Technologies Standards form the basic framework for market ramp-up
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Climate change Standards and specifications support climate targets
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Smart Farming Standards and specifications are drivers for the digitalization of agriculture
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Projects of ISO/TC 22/SC 34/WG 4

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Document number	Begin	Title	Comment
ISO/AWI 6626-3	2025-10-27	Internal combustion engines - Piston rings - Part 3: Coil-spring-loaded oil control rings made of steel More	Comment
ISO/CD 6622-2	2025-07-25	Internal combustion engines - Piston rings - Part 2: Rectangular rings made of steel More	Comment
ISO/CD 6624-2	2024-10-10	Internal combustion engines - Piston rings - Part 2: Half keystone rings made of cast iron More	Comment
ISO/CD 6624-4	2024-10-10	Internal combustion engines - Piston rings - Part 4: Half keystone rings made of steel More	Comment
ISO/CD 6624-3	2023-11-01	Internal combustion engines - Piston rings - Part 3: Keystone rings made of steel More	Comment
ISO/CD 6624-1	2023-11-01	Internal combustion engines - Piston rings - Part 1: Keystone rings made of cast iron More	Comment
ISO/DIS 6621-1	2023-11-01	Internal combustion engines - Piston rings - Part 1: Vocabulary More	Comment

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