英文原文标题：Hydrogen Technologies Code

中文翻译标题：氢能技术规范

LANGUAGES: English+Chinese【英文原文+中文翻译】

About Document Updates

This code provides fundamental safeguards for the generation, installation, storage, piping, use, and handling of hydrogen in compressed gas (GH2) form or cryogenic liquid (LH2) form.

Current Edition: 2026

Description

Get a Handle on Hydrogen and Help Safeguard Against Accidents.

Hydrogen has quickly become a popular fuel source, but due to its unique properties and applications, it must be handled and stored properly to mitigate its potential for burning, fire, and explosion. NFPA 2, Hydrogen Technologies Code, is the quintessential resource for building inspectors, engineers, installers, facility managers, and anyone else who deals with hydrogen.

The code provides comprehensive safeguards for the installation, storage, use, and handling of hydrogen in both compressed gas and cryogenic liquid forms.

This edition no longer relies on cross-referencing NFPA 55 as it now has full scope over all hydrogen requirements, including mixtures of gaseous hydrogen and fuel gases with a minimum hydrogen concentration of 95 percent by volume.

The 2026 edition also features several other updates, including:

Clarifications in Chapters 3 and 8 support the appropriate and consistent uses of the terms emergency shutdown system (ESS) and emergency shutdown device (ESD).

Chapter 9 is no longer reserved and now addresses explosion control for buildings and hydrogen equipment enclosures where hydrogen exceeds the maximum allowable quantities or where needed in accordance with a hazard analysis.

A new annex has been added to provide information on overpressure, external overpressure, and fireball sizes that result from deflagration venting of hydrogen/hydrogen mixtures.

Chapters 10 and 11 for hydrogen fueling have been updated to address the transfer of hydrogen from all station types to all vehicle sizes.

Chapter 14 for combustion applications has been updated to address hazards to facilities that utilize hydrogen-enriched fuels.