GB/T 29729-2022 (English Version)

Standard No.: GB/T 29729-2022
Language: Chinese, English version preview
Release Date: 2022
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 29729-2022
Replace: GB/T 29729-2013

Scope: This document specifies the categories of hydrogen systems, the basic characteristics of hydrogen, the hazard factors of hydrogen systems and the basic requirements for risk control. This document applies to the design and use of hydrogen production, storage, transportation and application systems.

Introduction

Analysis of the core contents of hydrogen system safety standards

Version comparison dimensions	GB/T29729-2013	GB/T29729-2022
Definition of terms	Basic hydrogen system terms	Eight new professional terms such as hydrogen partial pressure and liquid hydrogen booster pump
System classification	Hydrogen production/storage/transmission system	Add hydrogen use system specifications and refine hydrogen production from renewable energy
Risk control	Basic safety requirements	12 technical clauses including strengthening hydrogen embrittlement protection and flame arrester configuration

In-depth analysis of hazardous factors in hydrogen systems

Chapter 6 of the standard systematically identifies six major hazardous sources in hydrogen systems:

Leakage risk: Hydrogen permeability is three times that of natural gas, and it is necessary to use a helium mass spectrometer leak detector for detection
Combustion characteristics: Hydrogen flame ultraviolet radiation accounts for 75%, and it is recommended to configure a UV/infrared composite detector
Material degradation: The hydrogen embrittlement sensitivity of steel increases by 50% under high-pressure hydrogen environment, and it is necessary to test according to GB/T34542.3

Key points for the implementation of key technologies

Design specification for hydrogen storage containers

Fixed hydrogen storage containers shall be equipped with double safety valves + bursting discs for redundant protection
The vacuum degree of the insulation layer of the liquid hydrogen storage tank shall be ≤0.1Pa, and the daily evaporation rate shall be <0.3%
The packing density deviation of the filling material in the solid hydrogen storage container shall be ≤5%

Safety protection system configuration

Protection type	Technical requirements	Standard basis
Leak detection	25%LEL linkage alarm, response time <3s	GB12358
Flame arrester	Detonation wave flame arresting speed ≥ 2000m/s	GB5908

Standard evolution and industry impact

This revision focuses on responding to three major changes in the hydrogen energy industry: ① The proportion of hydrogen production from renewable energy has increased to 35%; ② The popularization of 70MPa on-board hydrogen storage; ③ The commercial application of liquid hydrogen has accelerated. The new clauses cover the safety needs of the entire hydrogen energy industry chain, especially the special requirements for the construction of hydrogen refueling stations.

GB/T 29729-2022 Referenced Document

GB 12014 Protective clothing—Static protective clothing
GB 12358 General Technical Requirements for Environment Gas Detection and Alarm Instruments in Workplace Environments*， 2024-11-28 Update
GB 16808 Combustible gas alarm control units
GB 21148 Foot protection — Safety footwear
GB 2894 Safety signs and guideline for the use
GB 4962 Technical safety regulation for gaseous hydrogen use
GB 50058 Code for design of electrical installations in explosive atmospheres
GB 50156 Code for design and cnstruction of filling station
GB 50177 Design code for hydrogen station (explanation)
GB 50217 Design Standards for Power Engineering Cables
GB 50275 Code for construction and acceptance of fan,compressor and pump installation
GB 50516 Hydrogen refueling station technical specification
GB 5908 Flame Arrestor*， 2024-11-28 Update
GB/T 13347 Flame arresters for petroleum gas pipeline systems
GB/T 19773 Specification of hydrogen purification system on pressure swing adsorption
GB/T 19774 Specification of water electrolyte system for producing hydrogen
GB/T 24499 Technology glossary for gaseous hydrogen,hydrogen energy and hydrogen energy system
GB/T 33145 Large volume steel seamless gas cylinder*， 2023-05-23 Update
GB/T 33292 Metal hydride hydrogen storage system for fuel cells backup power
GB/T 34542.2 Storage and transportation systems for gaseous hydrogen.Part 2:Test methods for evaluating metallic material compatibility in hydrogen atmosphere
GB/T 34542.3 Storage and transportation systems for gaseous hydrogen—Part 3: Test method for determination of the susceptibility of metallic materials to hydrogen gas embrittlement (HGE)
GB/T 35544 Fully-wrapped carbon fiber reinforced cylinders with an aluminum liner for theon-board storage of compressed hydrogen as a fuel for land vehicles
JB 4732 Steel pressure vessel - Stress analysis design standard
NB/T 10354 long tube trailer
NB/T 10558 Pressure Vessel Coating and Shipping Packaging
SH/T 3413 Specification for selection, inspection and acceptance of pipeline flame arresters for petroleum gas in petrochemical industry

GB/T 29729-2022 history

2022 GB/T 29729-2022 Essential requirements for the safety of hydrogen systems
2013 GB/T 29729-2013 Essential requirements for the safety of hydrogen systems