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On-Vehicle Hydrogen Applications

Did you know that Swagelok has products certified to EC-79 and HGV 3.1?

Specific testing is required to achieve this certification, including corrosion resistance, endurance, hydraulic pressure cycle testing, and external leakage testing. Products with this certification will be specially marked to reflect the approval.

What's the difference between EC-79 and HGV 3.1?

  • EC-79 is used to comply to the regulations set by the European Parliament and of the Council for hydrogen powered vehicles.
  • HGV 3.1 is used to comply to the regulations set by the The American National Standards Institute (ANSI) for hydrogen powered vehicles.

What's the difference between the H35 and H70 Classes?

  • The H35 Class is for pressures above 30 bar (435 psig) and up to 350 bar (5,076 psig)
  • The H70 Class is for pressures above 30 bar (435 psig) and up to 700 bar (10,159 psig)

On-vehicle applications include light-duty (car and van), heavy-duty (bus and truck), rail, ship, and aerospace. Specific testing is required to achieve this certification, including corrosion resistance, endurance, hydraulic pressure cycle testing, and external leakage testing.

Hydrogen technology requires high-integrity fluid system components to fill and store hydrogen in cylinders and transfer it to the fuel cell on the vehicle. Swagelok offers a wide range of fluid system components for use in many types of hydrogen related applications including the infrastructure that produces, transports, compresses, stores, and fills cylinders with hydrogen and for on-vehicle use.

Hydrogen-compatible products are available for pressures up to 20,000 psig, that meets EC-79 and HGV 3.1 for both pressure classes H35 and H70, such as:


View On-Vehicle Application Catalog

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Where can Swagelok help you?

Aside from providing high quality fittings certified to EC-79 and HGV 3.1, we also offer a wide range of services to help you maintain and operate your fluid system safely, and efficiently. Our services include:


Office of Energy Efficiency & Renewable Energy, article: Hydrogen: A Clean, Flexible Energy Carrier

"Due to their high efficiency and zero-or near zero-emissions operation, hydrogen and fuel cells have the potential to reduce greenhouse gas emission in many applications. Energy Department-funded analysis has shown that hydrogen and fuel cells have the potential to achieve the following reductions in emissions:

  • Light-duty highway vehicles: more than 50% to more than 90% reduction in emissions over today’s gasoline vehicles.
  • Specialty vehicles: more than 35% reduction in emissions over current diesel and battery-powered lift trucks.
  • Transit buses: demonstrated fuel economies of approximately 1.5 times greater than diesel internal combustion engine (ICE) buses and approximately 2 times higher than natural gas ICE buses.
  • Auxiliary power units (APUs): more than 60% reduction in emissions compared to truck engine idling.
  • Combined heat and power (CHP) systems: 35% to more than 50% reduction in emissions over conventional heat and power sources (with much greater reductions—more than 80%—if biogas or hydrogen from low- or zero-carbon sources is used in the fuel cell)"

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