GB/T 17258-2022 English PDF (GBT17258-2022)

Delivery: 3 seconds. Download true-PDF + Invoice.
Get QUOTATION in 1-minute: Click GB/T 17258-2022
Historical versions: GB/T 17258-2022
Preview True-PDF (Reload/Scroll if blank)

GB/T 17258-2022: Steel cylinders for the on-board storage of compressed natural gas as a fuel for automotive vehicles
GB/T 17258-2022
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 23.020.30
CCS J 74
Replacing GB/T 17258-2011
Steel Cylinders for the On-board Storage of Compressed
Natural Gas as a Fuel for Automotive Vehicles
(ISO 11439:2013, Gas Cylinders - High Pressure Cylinders for the On-board Storage
of Natural Gas as a Fuel for Automotive Vehicles, NEQ)
ISSUED ON: OCTOBER 12, 2022
IMPLEMENTED ON: MAY 1, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Terms, Definitions and Symbols ... 6
4 Types and Parameters ... 8
5 Technical Requirements ... 9
6 Test Methods ... 15
7 Inspection Rules ... 22
8 Marking, Coating, Packaging, Transportation and Storage ... 31
9 Installation ... 34
10 Certificate of Conformity and Batch Inspection Quality Certificate ... 34
Appendix A (normative) Hydrogen Sulfide Stress Corrosion Test ... 36
Appendix B (informative) Determination Method for Maximum Allowable Defect
Size for Non-destructive Evaluation (NDE) ... 38
Appendix C (normative) Ultrasonic Testing ... 39
Appendix D (normative) Flattening Test Method ... 44
Appendix E (informative) Batch Inspection Quality Certificate of Steel Cylinders for
the On-board Storage of Compressed Natural Gas as a Fuel for Automotive Vehicles48
Bibliography ... 51
Steel Cylinders for the On-board Storage of Compressed
Natural Gas as a Fuel for Automotive Vehicles
1 Scope
This document specifies the types and parameters, technical requirements, test methods,
inspection rules, marking, coating, packaging, transportation and storage requirements of
steel cylinders for the on-board storage of compressed natural gas as a fuel for automotive
vehicles (hereinafter referred to as “steel cylinders”).
This document is applicable to the design and manufacturing of steel cylinders with a
nominal operating pressure of 20 MPa and 25 MPa, a nominal volume of 30 L ~ 300 L, an
operating temperature of 40 C ~ 65 C and a design service life of 15 years.
The steel cylinders manufactured in accordance with this document are only used as the
storage containers fixed on automotive vehicles and filled with compressed natural gas as
automobile fuels that complies with GB 18047; additional loads caused by external forces,
etc. are not included in the service conditions.
This document does not apply to gas storage steel cylinders used at compressed natural gas
filling stations, nor does it apply to steel cylinders of welded structure.
2 Normative References
The contents of the following documents constitute indispensable clauses of this document
through the normative references in this text. In terms of references with a specified date,
only versions with a specified date are applicable to this document. In terms of references
without a specified date, the latest version (including all the modifications) is applicable to
this document.
GB/T 192 General Purpose Metric Screw Threads - Basic Profile
GB/T 196 General Purpose Metric Screw Threads - Basic Dimensions
GB/T 4157 Laboratory Testing of Metals for Resistance to Sulfide Stress Cracking and
Stress Corrosion Cracking in H2S Environment
GB/T 4336 Carbon and Low-alloy Steel - Dimension of Multi-element Contents - Spark
Discharge Atomic Emission Spectrometric Method (routine method)
GB/T 5777 Automated Full Peripheral Ultrasonic Testing of Seamless and Welded (except
submerged arc-welded) Steel Tubes for the Detection of Longitudinal and / or Transverse
S1---the design wall thickness at the center of the bottom of the steel cylinder, expressed in (mm);
S2---the design wall thickness of the grounding point at the concave bottom of the steel cylinder,
expressed in (mm).
Figure 2 -- Types of End Structure
5.3.3.4 There shall be a transition section between the annular shell at concave end of the
steel cylinder and the cylinder body, and the connection between the transition section and
the cylinder body shall be smooth.
5.3.4 Design of cylinder mouth
5.3.4.1 The thread of the cylinder mouth shall adopt tapered thread, which shall comply with
the stipulations of GB/T 8335 or relevant standards, and the number of effective threads
shall not be less than 8.
5.3.4.2 The thickness of the cylinder mouth shall have sufficient strength; the mouth shall
not be plastically deformed when bearing the torque of the upper valve and the additional
external force of the riveted neck ring.
5.3.5 Accessories
5.3.5.1 The cylinder valve shall comply with the stipulations of GB/T 17926 and shall be
equipped with a safety pressure relief device.
5.3.5.2 The nominal burst pressure of the rupture disc is the hydrostatic test pressure, and the
allowable deviation is ൅10%0 ; the operating temperature of the fusible plug is 110 C  5 C.
5.3.5.3 The rated discharge capacity of the safety pressure relief device shall be calculated in
accordance with GB/T 33215 and shall not be less than the safe discharge capacity of the gas
cylinder. In addition, it shall be ensured that the gas cylinder passes the fire burning test
specified in 6.15.
5.3.6 Maximum allowable defect size for non-destructive evaluation (NDE)
The maximum allowable defect size at any point of the steel cylinder shall be specified, so
as to prevent failure of the steel cylinder due to leakage or rupture during its service life. The
method of determining the maximum allowable defect size is shown in Appendix B.
5.4 Manufacture
5.4.1 General requirements
5.4.1.1 In addition to the stipulations of this document, the manufacture of steel cylinders
shall also comply with the stipulations of product drawings and relevant standards.
5.4.1.2 The body of the steel cylinders is generally manufactured through the following
methods:
a) Use steel billets, steel ingots and steel rods as the raw materials, and manufacture
through extrusion, stretching or spinning, thinning and mouth-closing;
b) Use seamless steel pipes as the raw materials, and manufacture through bottom-
closing and mouth-closing;
c) Use steel plates as the raw materials, and manufacture through stamping, stretching
or spinning, thinning and mouth-closing.
5.4.1.3 During the bottom-closing and forming process of tubular gas cylinders, metal shall
not be added, and welding shall not be performed.
5.4.1.4 The manufacture of the steel cylinders shall be managed in batches. In accordance
with the sequence of heat treatment, no more than 200 cylinders, plus the number of
cylinders used for destructive tests shall constitute one batch.
5.4.1.5 The depth of the concave end of the steel cylinders shall comply with the specified
design value; the thickness of the spherical shell and annular shell at the end shall comply
with the design requirements.
5.4.1.6 The preform made of seamless steel pipes by spinning shall be subject to process
evaluation; the inner surface of the end of the cylinder body shall not have visible concave
holes, wrinkles, bumps and scales; the defects at the end are allowed to be removed, but the
design thickness of the end shall be ensured; the cylinder body shall not be subject to
welding repair. For the gas cylinders made of seamless steel pipes through bottom-closing,
before mouth-closing, the bottom air-tight test shall be carried out one by one.
5.4.1.7 For the surface defects of the cylinder body, it is allowed to use s...