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GB 4962-2008 PDF English (GB 4962-1985: Older version)Search result: GB 4962-2008 (GB 4962-1985 Older version)
GB4962-2008: PDF in EnglishGB 4962-2008 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 71. 100. 20 G 86 Replacing GB 4962-1985 Technical Safety Regulation for Gaseous Hydrogen Use ISSUED ON: DECEMBER 11, 2008 IMPLEMENTED ON: OCTOBER 1, 2009 Issued by: General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the People’s Republic of China. Table of Contents Foreword ... 3 1 Scope ... 5 2 Normative References ... 5 3 Terms and Definitions ... 6 4 Basic Requirements ... 9 5 Replacement ... 18 6 Storage ... 19 7 Compression and Filling ... 24 8 Discharge ... 27 9 Fire Fighting and Emergence Handling ... 28 Appendix A (Informative) Hazard Properties of Gaseous Hydrogen ... 29 Technical Safety Regulation for Gaseous Hydrogen Use 1 Scope This Standard specifies the safety specifications of gaseous hydrogen on such aspects as application, replacement, storage, compression and filling, discharging process, firefighting and emergency treatment, as well as safety protection. This Standard is applicable to the various workplaces on the ground where gaseous hydrogen is produced, and it is not applicable to the locations for liquid hydrogen, overwater gaseous hydrogen and hydrogen used in aviation as well as on-board hydrogen supply system. Corresponding procedures during hydrogen production may be implemented by reference. 2 Normative References The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies. GB 2893 Safety Colors GB 2894 Safety Signs and Guideline for the Use GB 3836.1 Electrical Apparatus for Explosive Gas Atmospheres - Part 1: General Requirements GB 4385 Technical Requirements for Antistatic Footwear and Conductive Footwear GB 7144 Colored Cylinder Mark for Gases GB 7231 Basic Identification Colors and Code Indications and Safety Sign for Industrial Pipelines GB 12014 Working Clothing of Anti-electrostatic GB 16804 Precautionary Labels for Gas Cylinders GB 50016 Code of Design on Building Fire Protection and Prevention GB 50057 Design Code for Protection of Structures against Lightning GB 50058 Electrical Installations Design Code for Explosive Atmospheres and Fire Hazard GB 50177-2005 Design Code for Hydrogen Station SH 3059 General Rule of Piping Design Materials Selection for Petrochemical Industry SY/T 0019 Design Specification of Sacrificial Anode for Buried Steel Pipeline Safety Inspection Regulations for Gas Cylinders (State Bureau of Quality and Technical Supervision; implemented on July 1, 2001) Supervision Regulation on Safety Technology for Pressure Vessel (Former Ministry of Labor; implemented on January 1, 1991) Operating Regulations for Turbine Generator (1999 edition) (State Grid Corporation; implemented on November 9, 1999) 3 Terms and Definitions For the purposes of this Standard, the following terms and definitions apply. 3.1 Hydrogen filling station General term of such sites as buildings and structures for supplying hydrogen through bottles and/or pipelines, excluding hydrogen generation equipment 3.2 Gaseous hydrogen receiver General term of vessels with constant pressure and variable volume (dish gas holder) and with variable pressure and constant volume for storing hydrogen, excluding gas cylinder 3.3 Gaseous hydrogen filling station General term of such sites as buildings and structures equipped with hydrogen compression c) The fire separation between horizontal, vertical, spherical and dish receivers (holders) shall not be less than the diameter of the adjacent larger receiver; d) The total volume of a group of horizontal, vertical or spherical receivers shall not exceed 30000m3. The fire separation between groups shall not be less than one half of the height of the adjacent larger receiver for horizontal gaseous hydrogen receivers; it shall not be less than the diameter of the adjacent larger receiver for vertical and spherical receivers, and shall not be less than 10m. 4.1.3 Hydrogen filling station and gaseous hydrogen receiver shall be independent, which should be equipped with noncombustible solid wall and arranged at the leeward of the perennial minimum frequency wind direction of the factory, away from open fire or sparking sites, and shall not be arranged in the crowded areas or close to the main traffic lines. 4.1.4 Gaseous hydrogen filling station, hydrogen filling station, full cylinder room and empty cylinder room should be arranged at the edge of the workshop building. 4.1.5 Hydrogen use area shall be well ventilated. It shall be ensured that the maximum hydrogen content in the air shall not exceed 1% (volume). As for the buildings using mechanical ventilation, the air inlet shall be arranged on the lower part of the building, with the air outlet on the upper part. 4.1.6 Top plane of the building shall be even, so as to prevent hydrogen from accumulating in the dents. Transom window or gas vent shall be arranged on the top of building or on the upper part of outer wall. Gas vent shall be arranged uppermost toward the safety zone. 4.1.7 Where the hydrogen may accumulate or hydrogen concentration may increase, stationary flammable gas detecting alarm should be arranged above the monitoring point (source of release) or on the top of the workshop building, of which the installation height should be 0.5m~2m higher than the source of release and the surrounding should be reserved with clearance not less than 0.3m for the convenience of monitoring the hydrogen concentration. Effective covering level plane radius of flammable gas detecting alarm should be 7.5m indoor and 15m outdoor. 4.1.8 There shall be no open fire at least 10m around the gaseous hydrogen filling station, hydrogen filling station, full cylinder room and empty cylinder room. 4.1.9 Hydrogen in the hydrogen system must not be released inside the building. 4.1.10 Hydrogen reservoir vessels shall be separated with oxygen, compressed air, halogen, oxidant and other combustion-supporting gas cylinders. 4.1.11 Hydrogen filling station shall be independent single-layer building, not lower than Grade II fire resistance, which shall not be arranged in the basement or semi-basement of the building. Besides, pressure relief facilities shall be arranged for the explosive hazard zone in the station according to the requirements of GB 50016.When the full cylinders do not exceed 60 or the floor area does not exceed 500m2, it may be adjacent to the hydrogen-consuming workshop building not lower than Grade II fire resistance or non-open-fire-working Class D or Class E workshop building not lower than Grade II fire resistance, but the adjacent wall shall be the fire-proof one without door, window or opening. 4.1.12 Hydrogen filling station, gaseous hydrogen receiver, filling station and manifolds room shall be equipped with lightning earthing facilities according to the requirements of GB 50057 and GB 50058.Lightning protection devices shall be detected once every year. All the lightning and electrostatic earthing devices shall be periodically detected for the earthing resistance at least once every year; lightning protection devices in the explosive hazard zone should be detected once every half year. 4.1.13 As for the hydrogen filling station, gaseous hydrogen receiver, filling station, manifolds room and loading platform, their grounds shall be flat and smooth, sparkless and wear-resistant. 4.1.14 As equipment hoisting or hydrogen filling shall be conducted in the hydrogen filling station and filling station, bundle of seamless steel cylinders shall be adopted and hoisting facilities should be arranged, and the hoisting weight of hoisting facilities shall be determined according to the maximum load of the hoisting pieces; explosion-proof hoisting facilities shall be adopted in the explosive hazard zone. 4.1.15 Filling station, manifolds room, empty cylinder and full cylinder shall be arranged according to the following requirements: a) Manifolds room, empty cylinder and full cylinder shall be separated. Where the empty cylinder and full cylinder are stored in the closed or semi-open building, manifolds room shall be connected with the empty cylinder room or full cylinder room through door opening, but each room shall be provided with independent entrance/exit. b) Where the full cylinders are not greater than 60, the empty cylinders, full cylinders and manifolds may be arranged in the same room, but the full cylinders and empty cylinders shall be separated; the spacing between the full cylinders and empty cylinders shall not be less than 0.3m.The spacing between the empty (full) cylinders and manifolds should not be less than 2m. c) Manifolds room, empty cylinder room and full cylinder room shall not be directly connected with the instrument room, distribution room and welfare quarter, which shall be separated by the fire wall without door, window or opening. Otherwise, double-foyer room shall be arranged, self-closing door (e.g. swing door) shall be adopted, and fire endurance shall not be less than 0.9h. medicines that may affect their operation or judgment. 4.3 Hydrogen system 4.3.1 Hydrogen mass in the hydrogen system shall meet its safety requirements. 4.3.2 After stopping, the hydrogen system shall be separated with operating equipment with blind plate or other active isolating measures, and replaced and purged with the inert gas (its oxygen volume fraction shall not exceed 3%) in conformity with the sa.......Source: https://www.ChineseStandard.net/PDF.aspx/GB4962-2008 |