ULLIT hydrogen tank


Our 36 litre - 350 and 700 bar hydrogen tanks are approved according to the EC/79/2009 - IM/406/2010 regulation.


ULLIT hydrogen tank
ULLIT hydrogen tank



To meet the specific needs of a well-known aerospace actor, ULLIT has designed a 36 litre - 350 bar hydrogen cylinder approved TPED ADR-EN12245 for fuel cell.

Main selection criterion: extremely low permeation rate 4.10-5 Ncm3/s


Automotive :

The JRC PETTEN Laboratory (Laboratory of the European Union) has carried out on a ULLIT 36 litre bottle : 1 000 hydrogen cycles, from 20 to 350 bar, followed by 500 hours of permeation on the same bottle.

Test de perméation

The calculated permeation rate of the cylinder-valve and seal assembly was between 0.14 and 0.64 Ncm3/l/h.
Our manufacturing processes allow much higher performances than the requirements of the different standards.

Standard Maximum allowed hydrogen permeation rate
R134 46 Ncm3/Litre/Heure
EC 79/2009 6 Ncm3/Litre/Heure
ISO 15869:fev 2009 2.8 Ncm3/Litre/Heure


ULLIT has successfully passed all the tests requested by the regulation CE/79/2009 with more than 45 000 cycles performed without leakage or failure.


After the tests, the JRC PETTEN laboratory has carried out an external and internal inspection, thanks to a swing prism borescope.

Inspection interne du réservoir après test

The tank showed :

• No deterioration on the external surface,

• No collapse, no buckling effect.

Projet StorHy

As part of the European StorHy project, ULLIT has met all the requirements :

  • Breaking pressure higher than 1 600 bar,
  • 15,000 cycles at 20 - 875 bar,
  • Permeation less than 1 Ncm3/l/h

The Air Liquide laboratory has measured the permeation of a ULLIT bottle (without accessories) pressurized at 680 bar stabilized : the result was 0.02 Ncm3/l/h



We can design and manufacture a storage solution adapted to your needs.

From the smallest bottle to the largest tank, ULLIT can manufacture tanks with a maximum capacity of 1 500 liters, a max. length 3 200 mm and a max. diameter 900 mm.


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