Hydrogen generators using water electrolysis — Part 1: Safety
Hydrogen generators using water electrolysis — Part 1: Safety
This document specifies the safety requirements of hydrogen gas generation appliances or systems that use electrochemical reactions to electrolyse water to produce hydrogen, herein referred to as hydrogen generators.
ISO 22734-1:2025 - Hydrogen generators using water electrolysis - Part 1: Safety specifies safety requirements for appliances and systems that produce hydrogen by electrochemical water electrolysis. The standard covers generator-level safety for hydrogen and oxygen handling, electrochemical cells and stacks, mechanical and electrical equipment, control and safety systems, enclosure design, and required tests and markings. It applies to hydrogen generators using applicable ion-transport media and defines how the safety provisions relate to different sizes and subassemblies (see clauses on applicability and exclusions).
The standard focuses on practical safety controls across these technical areas:
ISO 22734-1:2025 is essential for:
Typical use cases include on-site hydrogen production for industrial processes, research labs, fuel-cell refuelling stations and distributed energy applications where safety of hydrogen and oxygen handling is critical.
This document is Part 1 (Safety) of the ISO 22734 series. Users should consult related parts, national regulations, and standards on hydrogen safety, pressure equipment, electrical installations and gas detection for complete compliance.
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