GB/T 42612-2023 English PDF (GBT42612-2023)

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GB/T 42612-2023: Fully-wrapped carbon fiber reinforced cylinders with a plastic liner for the on-board storage of compressed hydrogen as a fuel for land vehicles
GB/T 42612-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 23.020.30
CCS J 74
Fully-wrapped carbon fiber reinforced cylinders with a
plastic liner for the on-board storage of compressed
hydrogen as a fuel for land vehicles
(ISO 19881:2008, Gaseous hydrogen - Land vehicle fuel containers, NEQ)
ISSUED ON: MAY 23, 2023
IMPLEMENTED ON: JUNE 01, 2024
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms, definitions, symbols... 8
4 Type, parameter, classification and model ... 11
5 Technical requirements and test methods ... 13
6 Inspection rules ... 41
7 Installation and protection ... 46
8 Sign, packaging, transportation and storage ... 48
9 Product certificate and batch inspection quality certificate ... 49
Appendix A (Normative) Tolerance of test parameter ... 52
Appendix B (Normative) Routine maintenance and inspection of gas cylinders ... 54
Appendix C (Normative) Evaluation method of compatibility between plastic liner of
gas cylinder and hydrogen ... 57
Appendix D (Normative) Performance evaluation method of O-ring seals for cylinders
... 61
Appendix E (Normative) Evaluation method of welding procedure for plastic liner of
gas cylinder ... 64
Appendix F (Informative) Visual ultrasonic phased array detection and quality
classification method for welded joints of plastic liner of gas cylinders ... 66
Appendix G (Normative) Inter-layer shear test method ... 73
Appendix H (Normative) Helium leak detection method for airtightness of gas cylinders
... 77
Appendix I (Normative) Gas cylinder fire test method ... 94
Appendix J (Informative) Quality certificate for batch inspection of fully-wrapped
carbon fiber reinforced cylinders with a plastic liner for the on-board storage of
compressed hydrogen as a fuel for land vehicles ... 102
References ... 104
Fully-wrapped carbon fiber reinforced cylinders with a
plastic liner for the on-board storage of compressed
hydrogen as a fuel for land vehicles
1 Scope
This document specifies the type, parameters, classification and model, technical
requirements, test methods, inspection rules, installation, protection, marking,
packaging, transportation and storage requirements of fully-wrapped carbon fiber
reinforced cylinders with a plastic liner for the on-board storage of compressed
hydrogen as a fuel for land vehicles (hereinafter referred to as cylinders).
This document is applicable to the design and manufacture of refillable cylinders, which
have a nominal working pressure of 35 MPa and 70 MPa, a nominal volume greater
than or equal to 20 L and not greater than 450 L, an operating temperature not lower
than -40 °C and not higher than 85 °C, are fixed on motor vehicles for containing
hydrogen fuel.
Hydrogen gas cylinders, which are used for hydrogen fuel cell urban rail transit,
hydrogen ships, hydrogen aircraft, hydrogen power generation devices, etc., can refer
to this document.
2 Normative references
The contents of the following documents constitute the essential provisions of this
document through normative references in the text. For the dated documents, only the
versions with the dates indicated are applicable to this document; for the undated
documents, only the latest version (including all the amendments) is applicable to this
standard.
GB/T 223.3 Methods for chemical analysis of iron, steel and alloy - The diantipyryl
methane phosphomolybdate gravimetric method for the determination of
phosphorus content
GB/T 223.4 Methods for chemical analysis of iron, steel and alloy - The volumetric
method for determination of manganese content by ammonium nitrate oxidation
GB/T 223.5 Steel and iron - Determination of acid-soluble silicon and total silicon
content - Reduced molybdosilicate spectrophotometric method
GB/T 223.11 Iron, steel and alloy - Determination of chromium content - Visual
5 Technical requirements and test methods
5.1 General requirements
5.1.1 Design service life
The design service life of the gas cylinder is 15 years.
5.1.2 Number of design cycles
The cylinders are designed for 11000 cycles.
5.1.3 Allowable pressure
During filling and use, the allowable pressure of the gas cylinder is 1.25 times the
nominal working pressure.
5.1.4 Tolerance of test parameters
Unless otherwise specified, the test parameter tolerances shall comply with the
provisions of Appendix A.
5.1.5 Temperature range
During filling and use, the temperature of the gas cylinder shall not be lower than -
40 °C and not higher than 85 °C.
5.1.6 Hydrogen quality
The compressed hydrogen gas for filling cylinders shall meet the requirements of GB/T
37244.
5.1.7 Working environment
The design of gas cylinders shall consider its ability to continuously withstand
mechanical damage or chemical erosion; its outer surface shall at least adapt to the
following working environments:
a) Intermittent immersion in water or road splashing;
b) The vehicle is driven near the ocean or on roads where ice has been melted with
salt;
c) UV radiation from sunlight;
d) Vehicle vibration or gravel impact;
e) Contact with acid solution, alkali solution, fertilizer;
f) Contact with automotive fluids, such as gasoline, hydraulic oil, battery acid, glycol
and other greases;
g) Exposure to exhaust fumes.
5.1.8 Daily maintenance inspection
Routine maintenance and inspection shall be carried out within the service life of the
gas cylinder; the basic method and technical requirements of the inspection shall
comply with the provisions of Appendix B.
5.2 Materials
5.2.1 General requirements
5.2.1.1 The material properties shall comply with the relevant national standards or
industry standards.
5.2.1.2 The material shall have the original quality certificate, which is provided by the
material manufacturer, OR a copy of the quality certificate with the official seal of the
material management organization and the signature (seal) of the person in charge.
5.2.1.3 The materials shall be re-inspected by the gas cylinder manufacturer, before they
can be used.
5.2.2 Plastic liner
5.2.2.1 The plastic liner should be made of polyethylene (including modified
polyethylene) or polyamide (including modified polyamide). Its compatibility with
hydrogen shall meet the requirements of Appendix C.
5.2.2.2 The melting peak temperature of the plastic liner material shall be greater than
or equal to the specified value in the design documents.
5.2.2.3 When the raw material of the plastic liner is granular, the melt mass flow rate of
polyethylene (including modified polyethylene) and the melt volume flow rate of
polyamide (including modified polyamide) shall meet the requirements of the design
documents.
5.2.2.4 When the raw material of the plastic liner is powder, the apparent density,
powder fluidity, particle size distribution shall meet the requirements of the design
documents.
5.2.2.5 The gas cylinder manufacturer shall conduct re-inspection of the plastic liner
material by batch. The melting peak temperature shall be measured, according to the
test method specified in GB/T 19466.3, wherein the heating and cooling rate of
polyethylene (including modified polyethylene) is 10 °C/min; the heating and cooling
rate of polyamide (including modified polyamide) is 20 °C/min. When the raw m...