GB 4962-2008 English PDF (GB4962-2008)

Delivery: 3 seconds. Download true-PDF + Invoice.
Get QUOTATION in 1-minute: Click GB 4962-2008
Historical versions: GB 4962-2008
Preview True-PDF (Reload/Scroll if blank)

GB 4962-2008: Technical safety regulation for gaseous hydrogen use
GB 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 earth...