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 Regulation EC 79/2009 was formally repealed on 5 July 2022.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EU Regulation 2019/2144 (the “General Safety Regulation,” GSR2) repealed EC 79/2009 in full.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

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.

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“How long does qualification take and what does it cost?” is the second question every COPV procurement engineer asks. The answer is rarely on a vendor’s website — most of it lives in informal conversations between cylinder makers and notified bodies. This guide gives concrete 2026 figures based on lab pricing, accredited-body fees, and typical campaign timelines.

What an ISO 11119-3 qualification campaign actually involves

ISO 11119-3 is the design qualification standard for fully-wrapped composite gas cylinders with a non-load-sharing liner (Type IV). To qualify a new design, the manufacturer must demonstrate that test articles drawn from the production process pass each of the test categories below. Skipping a test is not optional except by formal equivalence with a sister design.

• Burst test (3 articles minimum)
• Hydrostatic pressure cycling
• Ambient-temperature pressure cycling (≥10,000 cycles)
• Extreme-temperature pressure cycling (high + low)
• Drop test (4 orientations)
• Bonfire test
• Gunfire test
• Permeation test
• Sustained-load / stress-rupture demonstration
• Material characterisation (fibre, resin, liner)
• Boss leak-tightness
• NDI / production verification protocols

Plus the documentation: design dossier, FEA report, manufacturing process documentation, traceability of materials lots, operator qualification records, calibration certificates for every measurement instrument used in production.

Cost estimates per test (2026 European pricing)

Total range for a single design: €130 000 – €310 000 in test costs alone, plus internal engineering time and documentation. A campaign that runs cleanly first time falls in the €150–200K band; one that needs re-test runs or design iterations climbs toward €300K.

Timeline (calendar weeks)

• Test article production: 8–14 weeks (full lot, traceable materials)
• Burst, hydrostatic, drop, gunfire, bonfire: 4–8 weeks once articles are at the lab (parallel scheduling)
• Cycle testing (10,000+ cycles): 6–12 weeks (cannot be accelerated; test rig limitation)
• Permeation test: 90 days continuous, plus instrumentation setup → 14–16 weeks
• Stress rupture: 6–18 months for full statistical demonstration; equivalence path can shorten to 8–12 weeks
• Notified body design review & certificate issue: 8–16 weeks after final test report

Realistic total: 8–14 months from test-article kickoff to notified-body certificate. Permeation and stress-rupture are the long poles. Programmes with aggressive timelines often run permeation in parallel with the rest of the campaign and use a sister-design equivalence rationale for stress rupture.

Notified body shortlist

For TPED conformity (which references ISO 11119-3), notified bodies are listed in NANDO. The most active for composite cylinders:

• TÜV SÜD (Munich) — large composite-cylinder portfolio, cooperates with BAM for testing
• BAM (Bundesanstalt für Materialforschung) (Berlin) — both notified body and the most equipped composite test lab in Europe
• Apragaz (Brussels) — historically active in composite gas cylinders
• Bureau Veritas (Paris) — broader pressure-equipment scope
• DNV (Oslo) — strong in maritime & offshore composite vessels; PED + TPED scope

For non-EU markets, recognised partners include UL (US), CSA Group (Canada), Lloyd’s Register, KGS (Korea), and CCC (China).

The five most common rejection causes

• Permeation rate above the design limit at the elevated-temperature condition. PET-lined designs at 700 bar have failed here when the liner formulation wasn’t optimised for thermal mobility.
• Hydrostatic pressure cycling fatigue cracks at the boss-liner interface. Boss-bonding adhesion is the single most common production-quality issue; fixing it usually requires a process change, not a design change.
• Bonfire — pressure relief device fails to vent in time. The PRD spec is part of the cylinder qualification under ISO 11119-3 § 7.3; mismatched PRD selection is a frequent rework cause.
• Gunfire — fragmentation outside acceptable envelope. Composite construction reduces fragmentation vs metal but doesn’t eliminate it; geometry matters more than people expect.
• Documentation gap. Material lot traceability, operator qualification, calibration records — boring stuff but causes 1-in-3 conformity-assessment delays.

Equivalence and family qualification

If you’ve already qualified a sister design, ISO 11119-3 allows reduced testing scope based on a documented equivalence rationale. Typical scope reduction is 30–50% of the test cost, but the notified body’s design review fee is unchanged. For a manufacturer with an existing 3 L 300 bar cylinder qualifying a 6 L 300 bar follow-on, the cost typically falls to €60–100K.

What MEYER does

The MEYER HDRX family is qualified to ISO 11119-3, EN 12245, TPED 2010/35/EU, and where applicable EN 17339. Production cylinders ship with the documentation pack needed to register the cylinder under the customer’s TPED periodic inspection programme. For programmes that need a custom cylinder qualified to bespoke programme requirements (aerospace, defence, NLL extension), we run the qualification campaign as a fixed-fee project — typically 12–18 months from spec freeze.

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EN 17339 is the European standard for hydrogen carbon-composite cylinders and tubes — but specifically for the cylinders that transport and store hydrogen, not the cylinders mounted on a vehicle or aircraft. Its full title is “Transportable gas cylinders — Hoop wrapped and fully wrapped carbon composite cylinders and tubes for hydrogen.” It is prepared by CEN/TC 23 (BSI secretariat) and acquires legal force through reference in RID and the technical annexes of ADR — the European rail and road dangerous-goods regulations. The 2024 revision introduced Type 2 hoop-wrapped construction, which is the single substantive technical change since the 2020 first edition.

What EN 17339 covers — and what it doesn’t

The standard applies to carbon-fibre composite cylinders and tubes for compressed hydrogen service that are permanently mounted in a frame — a bundle per EN ISO 10961, or a trailer / MEGC (Multiple-Element Gas Container) per EN 13807. The design envelope:

• Test pressure ≥ 300 bar
• Maximum working pressure 1 000 bar
• Maximum water capacity 3 000 L per cylinder
• Product p × V ≤ 1 000 000 bar·L

It is hydrogen-dedicated. The safety factor framework reflects that: design margins are applied to p_max (the maximum developed pressure at 65 °C, taken as 1.18 × p_w) rather than to the working pressure directly. Hydrostatic test pressure is set at p_h = 1.5 × p_w. This is a deliberate departure from generic transportable-gas logic — hydrogen-specific behaviour drives the design margins, not the gas-agnostic ratios of legacy standards.

What EN 17339 does not cover

Important — and frequently misunderstood:

• Standalone vehicle-mounted fuel tanks. Those are governed by ISO 19881, EC 79/2009 (now repealed), UN Regulation 134, and UN Regulation 110. EN 17339 is not in that family.
• Liquid hydrogen (LH₂). Cryogenic storage is out of scope.

This matters for supply-chain positioning. If you’re integrating an airframe-mounted hydrogen tank on a UAV, or a fuel-cell vehicle storage system, EN 17339 is not your design specification — it’s the standard that governs the trucking, MEGC, and bundle storage of the hydrogen that gets delivered to your refuelling station. EN 17339 is upstream in the hydrogen supply chain, not downstream at the vehicle.

Standards architecture and legal force

EN 17339 is prepared by CEN/TC 23 (Transportable gas cylinders technical committee), with BSI holding the secretariat. The standard itself is voluntary, but it is referenced in:

• RID — Regulations concerning the International Carriage of Dangerous Goods by Rail
• ADR — European Agreement concerning the International Carriage of Dangerous Goods by Road, technical annexes

That reference is what gives EN 17339 legal force in EU hydrogen transport. A bundle, MEGC, or trailer carrying hydrogen for road or rail transport in EU member states must demonstrate compliance with EN 17339 (or an equivalent path) to ship.

The standard was developed under CEN/TC 23 / WG 16 — the working group covering composite cylinders. MEYER participated in the working group as a COPV expert, contributing to the standard.

The 2024 headline change: Type 2 cylinders are now in scope

The CEN foreword to the 2024 revision states the technical change explicitly:

“EN 17339:2024 includes the following significant technical changes with respect to EN 17339:2020: introduction of Type 2 cylinders (hoop wrapped cylinders).”

That’s the single substantive change called out, and it propagates through the document in several places. The 2020 edition was fully-wrapped only — Type 3 (full wrap over a load-bearing metallic liner) and Type 4 (full wrap over a non-load-sharing polymer liner with metal bosses). The 2024 edition adds Type 2: hoop-wrapped construction where the composite reinforcement covers only the cylindrical sidewall, leaving the domes as bare metal.

Type-to-liner mapping (Clause 5.1)

You cannot build a Type 2 with a polymer liner under EN 17339, because by construction the bare-metal domes carry pressure. The standard is now formalised on this point.

The 16-test qualification programme (Clause 6 and Annex A)

The complete test programme, with applicability:

The two type-specific tests are worth understanding:

• Test 9 — Flawed cylinder test. Exercises the composite’s ability to carry load with intentionally introduced cuts in the overwrap. It is a Type 3 / Type 4 acceptance test by design and is not meaningful on a Type 2, where the composite is in the hoop direction only.
• Test 12 — Permeability. Intrinsically a Type 4 test. Types 2 and 3 have a metallic gas barrier (the seamless metallic liner) that reduces permeation to negligible levels; Test 12 measures the polymer-liner-specific permeation behaviour that is the defining design constraint of Type 4.

Annexes

• Annex A — prototype, design-variant and production testing protocols. Updated to include Type 2 design-variant paths.
• Annex B — certificate templates. Type 2 now has its own certificate path.
• Annex C — high-velocity bullet test (informative, not required). Unchanged in substance.

What didn’t change in 2024

Worth stating, because it’s the larger part of the document: the design-and-manufacture clause for composite overwraps (winding parameters, batch traceability, autofrettage), the normative reference set, the safety-factor framework (p_max = 1.18 × p_w; p_h = 1.5 × p_w), the marking clause, and the conformity evaluation flow are all carried forward unchanged.

Practical implication: if you have a Type 3 or Type 4 design previously qualified to EN 17339:2020, the 2024 revision does not by itself trigger requalification. The changes are additive (adding Type 2) rather than restrictive on the existing types.

Normative references

• EN ISO 9809-1 / -2 / -4 — seamless steel cylinder design (for metallic-liner Type 3)
• EN ISO 7866 — seamless aluminium-alloy cylinders (for metallic-liner construction)
• EN ISO 11120 — seamless steel tubes (for tube applications)
• EN ISO 11114-1 / -2 / -4 — gas/material compatibility, including hydrogen compatibility provisions
• EN ISO 13769 — cylinder marking (stamp marking)
• EN ISO 10961 — bundle design (where the cylinder lives in service)
• EN 13807 — battery vehicle / MEGC design

How EN 17339 differs from related standards

What to ask a supplier

• Is this cylinder qualified to EN 17339:2024 (or :2020 for Type 3/4 designs predating the 2024 revision)?
• What is the cylinder Type — 2, 3, or 4 — and what is the liner construction?
• What’s the documented test report against the 16-test programme, including the type-specific tests (Test 9, Test 12)?
• Where is the cylinder integrated — bundle (EN ISO 10961), MEGC (EN 13807), or other? EN 17339 only covers permanently-frame-mounted service.
• Does the supplier hold the π-mark certificate for hydrogen transport under TPED?

What MEYER offers

For applications in EN 17339’s scope — composite cylinders and tubes integrated into hydrogen-transport bundles, MEGCs, and trailers — MEYER manufactures Type 4 cylinders qualifiable to EN 17339 on a programme-by-programme basis. Most of the cylinders in the MEYER COPV catalog can be qualified to EN 17339 when the application calls for it — the qualification path is established and the production line is set up for the test programme described above. Documentation pack includes the test programme reports (1–16 as applicable), liner-specific permeability data (Test 12), the π-mark certificate, and materials traceability.

For applications outside EN 17339’s scope — vehicle-mounted, airframe-mounted, or otherwise non-frame-integrated — the qualification path runs through ISO 19881, UN R134, or programme-specific aerospace standards instead. We can advise on the right qualification path for your application.

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“What standard is your COPV qualified to?” is one of the first questions a procurement engineer asks. The answer involves a small alphabet of European and international standards that overlap in some places and diverge in others. This guide maps them out — what each standard covers, when you need it, and how to decide which to ask for in your RFQ.

The four standards that matter

For composite cylinders intended for European and international service, four standards do most of the work:

They are not alternatives — most aerospace COPVs are qualified to several at once. The trick is knowing which combination your specific application needs.

TPED 2010/35/EU — the transport directive

If your cylinder will be carried on a road, rail, sea, or inland waterway transport in the EU, it falls under TPED (Transportable Pressure Equipment Directive). Cylinders that conform are stamped with the π (“pi”) mark and a notified-body number.

What TPED covers:

• Cylinder design and manufacture
• Periodic re-testing requirements
• Marking and labelling
• Conformity assessment by an EU notified body

What it doesn’t cover: stationary equipment (that’s PED), and aerospace use under aviation regulators (those have their own qualification — DO-160 for avionics, ECSS for ESA programmes, etc.).

You need TPED if: your cylinder leaves your facility on a truck, ship, plane, or train and contains compressed gas at > 0.5 bar gauge.

PED 2014/68/EU — the pressure equipment directive

For stationary pressure equipment placed on the EU market, PED applies. Conforming products carry the CE mark (the same CE mark you see on consumer electronics, but earned through a different conformity-assessment route).

PED applies a hazard category based on pressure, volume, and gas type (Group 1 = dangerous gases like hydrogen, oxygen; Group 2 = non-dangerous like nitrogen, air). The category determines what conformity-assessment module you need (Module A through H) and whether a notified body has to be involved.

You need PED if: your cylinder is part of a stationary system installed in the EU — buffer tanks, lab gas distribution, manifolds, fixed test rigs.

ISO 11119-3 — composite cylinder design

ISO 11119-3 is the international standard specifically for fully-wrapped composite cylinders with a non-load-sharing liner — i.e. Type IV. It defines:

• Design qualification testing (burst, hydrostatic, ambient temperature cycle, extreme temperature cycle, drop test, fire test, gunfire test, permeation test)
• Production testing requirements
• Materials and processing controls
• Marking and traceability

ISO 11119-3 is reference material for engineers designing composite cylinders. It’s not itself a regulatory mark — your cylinder isn’t “ISO certified” in the consumer sense. But conformance to ISO 11119-3 is typically how a TPED or PED notified body decides your design qualifies.

Sister standards:

• ISO 11119-1 — hoop-wrapped (Type II) cylinders
• ISO 11119-2 — fully-wrapped metal-lined (Type III) cylinders
• ISO 11119-3 — fully-wrapped non-metal-liner (Type IV) cylinders ← polymer liners
• ISO 11515 — large composite cylinders (above ~450 L)

EN 12245 — the European composite cylinder spec

EN 12245 is the European standard for fully-wrapped composite cylinders. It covers Type II, III, and IV designs and is widely accepted by EU notified bodies as the design basis for TPED conformity. EN 12245 and ISO 11119-3 are largely aligned but with small national differences in test methods and acceptance criteria.

For most aerospace and industrial applications in the EU, EN 12245 is the de facto design baseline. North American buyers may instead reference UN/ISO standards or local DOT specifications.

Aerospace-specific overlay standards

The four standards above cover commercial pressure-equipment compliance. Aerospace and space applications often add domain-specific overlays:

• ECSS-E-ST-32-02C — European Cooperation for Space Standardization, structural design (for ESA programmes)
• NASA-STD-6016 / NASA-STD-6001 — NASA materials and processes (for US programmes)
• RTCA DO-160 — environmental testing for avionics and onboard equipment
• FAA/EASA airworthiness — for cylinders flown on certified aircraft

These typically apply on top of TPED/PED — your cylinder still has to be a properly-qualified pressure vessel; the aerospace standards add mission-specific environmental and quality requirements.

Decision tree: what to ask for in an RFQ

For a typical aerospace COPV procurement:

• Hydrogen UAV in the EU — TPED (π mark) baseline, ISO 11119-3 design conformance, hydrogen-compatible materials. EASA airworthiness if the drone needs certified flight.
• CubeSat propulsion module — design-qualified to ISO 11119-3, materials traceable, cleanroom-handled, aerospace customer’s own qualification testing on top.
• Microlauncher pressurant tank — design-qualified to ISO 11119-3, programme-specific qualification testing (typically launch loads, vibration, thermal cycling per launch provider’s requirement). May or may not need TPED depending on whether the tank is transported separately.
• Industrial gas distribution in a fixed location — PED Module A or H depending on category, no TPED needed.
• Hydrogen vehicle / fuel-cell bus — TPED for the cylinder, EC 79/2009 for the vehicle hydrogen system, ECE R134 for type approval.

What MEYER COPVs are qualified to

The HDRX cylinder catalog includes products with various combinations of:

• π (TPED 2010/35/EU) — for transport in the EU
• CE (PED 2014/68/EU) — for stationary pressure equipment
• ISO 11119-3 — composite cylinder design baseline
• EN 12245 — European composite cylinder design
• EN 17339 — composite cylinders for aviation breathing systems
• UW — under-water service rated (diving / submerged use)
• Specification — bespoke programme qualification (typical for aerospace and space programmes where the customer’s own qualification testing supersedes commercial standards)

The exact certification of each part number is shown in the approval column of the catalog. If your programme needs a specific certification not listed, tell us in the RFQ — many aerospace programmes get a customer-specific qualification on top of the commercial certification.

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