EC79 Hydrogen Vehicle Compliance — Repealed in 2022, Here’s What Replaced It
If you’ve been writing “EC 79/2009 compliant” on your hydrogen-component datasheets in 2026, you’ve been wrong for almost four years. Regulation EC 79/2009 was formally repealed on 5 July 2022. The EU type-approval framework moved to UN Regulation 134, governed under EU Regulation 2019/2144 and Implementing Regulation (EU) 2021/535. Most vendor pages and procurement specs still reference EC79 as if it were live. Here’s what’s actually in force, what changed, and how to update your spec language.
What EC 79/2009 was, briefly
EC 79/2009 was the European framework regulation for the type-approval of hydrogen-powered motor vehicles, including the technical specifications for hydrogen storage systems and hydrogen components. Sub-regulation EU 406/2010 added detailed implementation rules. The regime governed COPVs, regulators, sensors, valves, and the integrated vehicle hydrogen system.
EC 79/2009 was a self-contained European framework. It coexisted with — but was independent of — the global UN Regulation 134, adopted by UNECE in June 2013. Manufacturers selling into the EU were doing dual qualification (EC 79 plus UN R134) until the 2022 transition.
What changed on 5 July 2022
EU Regulation 2019/2144 (the “General Safety Regulation,” GSR2) repealed EC 79/2009 in full. From that date, hydrogen-vehicle type-approval in the EU runs through:
- EU Regulation 2018/858 (the framework type-approval regulation that replaced Directive 2007/46/EC)
- EU Regulation 2019/2144 (the General Safety Regulation, GSR2, lists UN regulations as mandatory)
- UN Regulation 134 (the technical hydrogen-vehicle standard, transposed via the EU mandatory list)
- Commission Implementing Regulation (EU) 2021/535 (specific implementation rules for systems not fully covered by R134 — including some component-level provisions)
The practical effect is that EU and UN type-approval converged onto UN R134. There is no longer a separate “EC 79” stamp. Hydrogen components and storage systems are tested and approved against R134, with EU-specific delta requirements coming through Regulation 2021/535.
The component-level gap (the part most procurement specs miss)
UN R134 defines the type-approval of complete hydrogen storage systems and the vehicle as a whole. It does not separately type-approve every component — pressure regulators, temperature sensors, fittings, and check valves are covered as part of the storage-system certification, not as standalone components. Under EC 79/2009, those components did have their own approval categories.
The EU is filling this gap through:
- R134 supplements (most recently: Supplement 2 to the 02-series, tabled at GRSP April 2025, expected adoption WP.29 2026)
- EU Implementing Regulation 2021/535 covering specific component categories
- Possible follow-on EU regulation 2026–2027 to fully replace the EC 79 component framework
Until then, procurement engineers face genuine ambiguity for individual components. The defensible answer is: spec the component to UN R134’s storage-system test envelope and to EU 2021/535’s component provisions — and require vendor evidence against both. Citing “EC 79” alone is not sufficient.
UN R134 vs EC 79 — what’s actually different
| Topic | EC 79/2009 | UN R134 (current 02-series) |
|---|---|---|
| Design life | 15 years | 25 years (from 02-series amendments) |
| Burst pressure ratio | 2.25× NWP | 2.25× NWP minimum; 200% NWP review in progress |
| Heavy-duty scope | Light-duty focus | Heavy-duty included (Phase 2) |
| Fire test | Localised + engulfing | Tightened: 2-zone localised + engulfing + heat-input verification |
| TPRD | Required, basic spec | Required, with directional and orientation criteria |
| Cycle test | 11,000 cycles to 125% NWP | 11,000 to 125% NWP + extended-cycle option for fleet vessels |
| Geographic scope | EU only | UNECE 1958 contracting parties (~60 countries) |
Mandatory dates
- 5 July 2022 — EC 79/2009 repealed. UN R134 becomes the type-approval baseline.
- 15 June 2024 — UN R134 02-series amendments enter into force.
- 1 September 2027 — UN R134 02-series mandatory for all new vehicle types in the EU.
- ~2026 (expected) — UN R134 Supplement 2 adopted at WP.29; tightening of component-level provisions.
What to update on your datasheets
- Remove “EC 79/2009 compliant” — it no longer means anything.
- Replace with “Tested per UN R134 02-series” with the specific test scope you’ve actually run.
- Add “Compliant with EU 2019/2144 and Implementing Regulation 2021/535” if your component is in the storage system.
- Cite the specific R134 test (cycle, leak, fire, drop) and the report number.
What MEYER offers
The MEYER HDRX cylinder family and HDRX-R450 hydrogen regulator are tested per UN R134 02-series. Where customers require an explicit EU compliance statement, our certificates reference UN R134 + EU 2019/2144 + Implementing Regulation 2021/535 as the legal basis. Documentation pack ships with every qualified delivery.
