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GB/T 29411-2012 English PDF (GBT29411-2012)

GB/T 29411-2012 English PDF (GBT29411-2012)

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GB/T 29411-2012: Technical specification of hydrogen-oxygen generator with water electrolyte
GB/T 29411-2012
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.180
F 19
Technical specification of hydrogen-oxygen generator with
water electrolyte
ISSUED ON: DECEMBER 31, 2012
IMPLEMENTED ON: OCTOBER 01, 2013
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 ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Classification and designation ... 6
5 Technical requirements ... 6
6 Testing and measuring ... 13
7 Security techniques ... 16
8 Plates and markings ... 17
9 Packaging and transportation ... 18
Appendix A (Normative) Measurement of gas production by volumetric method ... 20
Technical specification of hydrogen-oxygen generator with
water electrolyte
1 Scope
This Standard specifies the classification and designation, technical requirements,
testing and measuring, security techniques, plates and markings, packaging and
transportation of hydrogen-oxygen generator with water electrolyte.
This Standard applies to hydrogen-oxygen generators with a hydrogen-oxygen mixed
gas production of 0.1 m3/h ~ 30 m3/h.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
GB 150.4, Pressure vessels - Part 4: Fabrication, inspection and testing, and
acceptance
GB/T 2829, Sampling procedures and tables for periodic inspection by attributes
(apply to inspection of process stability)
GB 3836.5, Explosive atmospheres - Part 5: Equipment protection by pressurized
enclosure p
GB/T 3985, Compressed asbestos fibre jointing
GB/T 4237, Hot rolled stainless steel plate, sheet and strip
GB/T 4830, Industrial process measurement and control instruments - Pressure range
and quality of air supply
GB 4962, Technical safety regulation for gaseous hydrogen use
GB/T 8175, Guide for design of thermal insulation of equipment and pipes
GB 9448, Safety in welding and cutting
GB/T 11352, Carbon steel castings for general engineering purpose
GB/T 12332, Metallic coatings - Electroplated coatings of nickel for engineering
purposes
GB/T 13306, Plate
GB 50058, Code for design of electrical installations in explosive atmospheres
GB 50177, Design code for hydrogen station
GB 50316, Design code for industrial metallic piping
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
hydrogen-oxygen mixed gas
A mixed gas of hydrogen and oxygen, with a ratio of 2:1, produced by a hydrogen-
oxygen generator with water electrolyte.
3.2
hydrogen-oxygen generator
A device for electrolyzing water to produce a hydrogen-oxygen mixed gas, consisting
of a water electrolyzer, a power supply, a water and gas separation device, a flame
arrester, etc.
3.3
water electrolyzer
A device that generates hydrogen-oxygen mixed gas, consisting of electrodes, spacers,
and tanks. The water electrolyzer is the main equipment of the hydrogen-oxygen
generator, and its performance parameters will determine the technical performance of
water electrolysis to produce hydrogen-oxygen mixed gas.
3.4
fire arrester
A device used to prevent external flames from entering the equipment and pipes of the
hydrogen-oxygen generator or to prevent the spread of flames between equipment and
pipes.
5.3.1 The protective cover or enclosure shall be made of non-combustible materials; the
minimum thickness shall be greater than 0.6 mm, and stainless-steel plates or carbon
steel plates are generally used. For protective covers with larger areas, strengthening
measures or double-layer structures shall be adopted according to strength or rigidity
requirements.
5.3.2 When the protective cover or enclosure needs to be equipped with an insulating
layer, it shall be designed according to GB/T 8175. The insulation material shall be non-
combustible materials, and shall be provided with measures to prevent the materials
from spreading and scattering.
5.3.3 The inner surface of the protective cover or enclosure shall be flat and free of
accumulation space for hydrogen-oxygen mixed gas, and shall be provided with an
exhaust port at the highest point on the top. If there are two or more places with the
highest point on the top, an exhaust outlet shall be provided at each highest point.
5.3.4 In order to avoid the accumulation of hydrogen-oxygen mixed gas in the
protective cover or enclosure, a ventilator should be installed on the top or upper side.
When conditions permit, compressed air or nitrogen can be connected. Inspection
openings and maintenance openings shall be provided in locations where the protective
cover or enclosure is convenient for inspection and maintenance. Their number and size
shall be determined according to the inspection and maintenance objects or functions.
Inspection openings and maintenance openings shall be equipped with viewing
windows or covers.
5.4 Water electrolyzer
5.4.1 The performance parameters and structure of the water electrolyzer shall be based
on the basic requirements of reducing electric energy consumption per unit of gas
production, reducing manufacturing costs, and extending service life. The structural
type of the water electrolyzer, the structure, coating and material of the electrolysis cell
and its electrodes and separators shall be reasonably selected.
5.4.2 The ratio of hydrogen and oxygen mixed gas produced by the water electrolyzer
shall be 2:1, and the production capacity shall comply with the requirements in Table 1.
5.4.3 The selection of sealing gaskets shall ensure that the water electrolyzer does not
leak or corrode when in working condition, and can withstand the changes in the
working condition when the tank is opened and stopped. Its quality shall comply with
GB/T 3985 or the relevant standards of the material selected for the specific water
electrolyzer cell body design.
5.4.4 The steel castings on the electrolyzer shall comply with the requirements of GB/T
11352.
5.4.5 The quality of electroplated parts of the water electrolyzer shall meet the
following requirements:
a) The cladding surface of the electroplated parts shall not have serious defects such
as bubbling, peeling, partial lack of coating and scratches;
b) The cladding thickness, bonding strength and void content of the electroplated
parts shall comply with the requirements of GB/T 12332;
c) The inspection sampling and sampling methods for the cladding thickness,
bonding strength and void content of the electroplated parts shall be in accordance
with the provisions of GB/T 2829. Electroplated parts can be tested using test
pieces electroplated at the same time in the same process.
5.4.6 The preparation, filling and use of cell liquor shall be convenient, safe and reliable
to prevent leakage and venting.
5.4.7 The operating temperature limit of the water electrolyzer shall comply with the
provisions of Table 1, and an automatic protective device shall be equipped.
5.4.8 The cumulative operating time of electrode end plates and electrode plate
manufacturing materials under rated working conditions shall exceed 36 months.
5.5 Water and gas separation device and ga...
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