ISO 14687 – Hydrogen Fuel Quality Standard

An international specification defining purity requirements for hydrogen used
in fuel-cell and industrial applications.

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Understanding ISO 14687

ISO 14687 sets out the quality specifications for hydrogen gas intended for use in fuel cells, mobility, and industrial processes.
It defines the maximum allowable concentration of impurities such as moisture, oxygen, nitrogen, carbon monoxide, carbon dioxide, sulphur compounds, and hydrocarbons that could impact fuel-cell performance or safety.

The standard provides a clear framework for verifying hydrogen purity at production, transport, and dispensing stages.
It is essential for ensuring safe, efficient, and reliable operation of hydrogen-powered systems and for maintaining global consistency in hydrogen-quality certification.

FAQ

  • What is ISO 14687 used for?
    ISO 14687 specifies the quality requirements for hydrogen fuel to guarantee compatibility with fuel-cell technology and other high-purity applications.
  • Which impurities are monitored under ISO 14687?
    The standard includes limits for moisture, oxygen, nitrogen, argon, carbon monoxide, carbon dioxide, total hydrocarbons, sulphur compounds, halogenated compounds, and particulates.
  • Why is hydrogen purity so critical?
    Even trace levels of contaminants can reduce fuel-cell efficiency or damage catalysts. ISO 14687 ensures hydrogen meets the strict purity needed for long-term system reliability.
  • How does it relate to other standards?
    It works in conjunction with ISO 21087, which defines analytical methods for verifying hydrogen quality, and ISO 19880-8, which covers sampling procedures.
  • Who applies ISO 14687?
    Hydrogen producers, refuelling-station operators, testing laboratories, and regulatory bodies use the standard to certify and monitor hydrogen-fuel quality.

Key Principles of ISO 14687-Compliant Hydrogen Quality Control

  • Defined Purity Classes
    Specifies detailed impurity thresholds for hydrogen used in mobility, stationary, and industrial applications.
  • Global Consistency and Safety
    Harmonises hydrogen-fuel specifications worldwide, ensuring safety and interoperability across markets.
  • Traceable Analytical Verification
    Requires documented testing using validated methods (per ISO 21087) for each impurity.
  • Supports Clean-Energy Certification
    Forms part of the regulatory framework enabling hydrogen to be traded as a certified clean energy carrier.
  • Foundation for Fuel-Cell Reliability
    Ensures hydrogen quality that maintains catalyst integrity and performance in PEM and SOFC fuel cells.

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Expertise You Can Rely On

With decades of experience in gas analysis and hydrogen quality control, GAS supports laboratories and producers in applying international standards such as ISO 14687 and ISO 21087.
Our experts help implement reliable measurement strategies for verifying hydrogen purity and ensuring compliance with evolving regulatory frameworks.

Contact our specialists to learn more about establishing ISO 14687-compliant hydrogen-quality testing in your facility.

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