| TF H2: Status report |
| Reference Number: GRSP-78-14/Rev.2 |
| Meeting Sessions: 78th GRSP session (1-4 Dec 2025) |
| Document date: 02 Dec 25 |
| Relevant to: WP.29 Regulatory Project | Safety-related performance of vehicles and systems fuelled with liquefied hydrogen |
| Click here to view the full document file |
| Hydrogen fuel safety: Proposal to amend document GRSP/2025/41 |
| Reference Number: GRSP-78-15/Rev.1 |
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Proposal from the Task Force on Hydrogen Regulations. |
| Meeting Sessions: 78th GRSP session (1-4 Dec 2025) |
| Document date: 02 Dec 25 |
| Document status: Superseded |
| Relevant to: WP.29 Regulatory Project | Safety-related performance of vehicles and systems fuelled with liquefied hydrogen |
| Click here to view the full document file |
| Hydrogen fuel systems: Proposal for a new UN Regulation |
| Reference Number: GRSP/2025/41 |
|
Proposal to establish a new UN Regulation for type approval of motor vehicles and components using liquefied hydrogen fuel systems. The regulation applies to heavy-duty vehicles (categories M2, M3, N2, N3) and specifies requirements for liquefied hydrogen storage systems, pressure relief and shut-off devices, and vehicle fuel systems. Testing procedures include proof pressure verification, boil-off control, vacuum loss tolerance, and bonfire tests. Vehicle systems must prevent hydrogen accumulation in passenger compartments, limit exhaust hydrogen concentration, and include warning systems. Approval marks and periodic technical inspections are required. |
| Meeting Sessions: 78th GRSP session (1-4 Dec 2025) |
| Document date: 22 Sep 25 |
| Document status: Superseded |
| Relevant to: WP.29 Regulatory Project | Safety-related performance of vehicles and systems fuelled with liquefied hydrogen |
| Click here to view the full document file |
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| 19. | New UN Regulation on liquid hydrogen |