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TSG R0006-2014

Chinese Standard: 'TSG R0006-2014'
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Detail Information of TSG R0006-2014; TSGR0006-2014
Description (Translated English): Supervision Regulation on Safety Technology for Gas Cylinder
Sector / Industry: Special Equipment Industry Standard
Classification of Chinese Standard: J74
Classification of International Standard: 23.020.30
Word Count Estimation: 56,594
Date of Issue: 9/5/2014
Date of Implementation: 1/1/2015
Older Standard (superseded by this standard): ZBFGH 55-2000; ZBFGH 53-1993
Drafting Organization: Dalian Institute of Boiler and Pressure Vessel Inspection
Administrative Organization: China Special Equipment Inspection and Research Institute
Regulation (derived from): National AQSIQ 2014 No. 98
Issuing agency(ies): Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
Summary: This Standard applies to normal ambient temperature (-40��C ~ 60��C, Note 1-1) for use nominal volume of 0.4L ~ 3000 L, nominal working pressure of 0.2MPa ~ 35MPa (gauge pressure, the same below) and the pressure and the mixed gas with a liquid volume of th

TSG R0006-2014
TECHNICAL SPECIFICATION FOR
SAFETY OF SPECIAL EQUIPMENT
Supervision regulation on
safety technology for gas cylinder
气瓶安全技术监察规程
ISSUED ON: SEPTEMBER 05, 2014
IMPLEMENTED ON: JANUARY 01, 2015
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine of PRC
Table of Contents
Foreword ... 3 
1 General ... 5 
2 Materials ... 13 
3 Design ... 17 
4 Manufacture ... 24 
5 Accessories of gas cylinders ... 29 
6 Filling and use ... 35 
7 Periodic inspection ... 42 
8 Supplementary ... 47 
Appendix A Gas cylinder’s variety, variety code, corresponding product
standard ... 48 
Appendix B Gas cylinder’s mark ... 50 
Appendix C Saturated vapor pressure, filling factor, physical properties of
commonly used cylindered gases ... 59 
Appendix D Periodic inspection report of gas cylinder ... 65 
Appendix E Catalog of national standards for gas cylinder ... 67 
Relevant regulations and specifications ... 69 
Foreword
In April 2008, the Special Equipment Safety Supervision Bureau (hereinafter
referred to as the Special Equipment Bureau) of the General Administration of
Quality Supervision, Inspection and Quarantine (hereinafter referred to as the
AQSIQ) issued the task book for drafting the “Supervision regulation on safety
technology for gas cylinder (hereinafter referred to as “Regulation”)” to the
China Special Equipment Inspection and Research Institute (hereinafter
referred to as the China Special Inspection Institute). In May 2008, the China
Special Inspection Institute organized relevant experts to set up a drafting group
and held the first working meeting in Beijing, to discuss the principles, key
contents, main issues, structure (chapter) framework for the drafting of the
Regulations, made specific work division on the drafting work, established a
time schedule for the drafting work. In October 2008 and March 2009, the
drafting group held the second and third drafting work meetings in Beijing, to
discuss and revise and form the draft of “Regulation” for comments. In
September 2010, the drafting group held the fourth working meeting in Zhejiang
Shangyu, to make corresponding modifications of the draft of “Regulation” for
comments. In April 2011, after reviewing the draft for comments, the Special
Equipment Bureau solicited for comments online in the form of ZJTH [2011]
No.19 documents. In September 2011, according to the solicited opinions, the
drafting group held its fifth working meeting in Beijing, formed a revision opinion
on the draft of “Regulation” for comments. In December 2011, the drafting group
revised and formed the “Regulation” for review in accordance with the spirit of
the fifth work meeting. In May 2012, the Special Equipment Bureau submitted
the draft for review to the Special Equipment Safety Technical Committee of the
General Administration of Quality Supervision, Inspection and Quarantine for
review. The drafting group revised the draft to form a draft for approval
according to the review opinions. On September 5, 2014, the “Regulation” was
approved by the General Administration of Quality Supervision, Inspection and
Quarantine for release.
The basic principles of the drafting of this “Regulation” are that, according to
the “Law on Safety of Special Equipment” and “Provisions on Safety
Supervision of Special Equipment”, on the basis of fully absorbing and
combining the actual situation and experience of safety supervision of gas
cylinder for many years, in order to strengthen the safety supervision of gas
cylinder, ensuring the safe use of gas cylinders, promoting the development of
the national economy, protecting the safety of people and property, it
establishes specific requirements for the safety supervision of gas cylinder in
such links as material, design, manufacturing, gas cylinder’s accessories, filling
and use, periodic inspections.
The main drafting organizations and personnel of this Regulation are as follows:
Dalian Boiler and Pressure Vessel Inspection and Research Institute: Hu
Jun, Han Bing
Capital University of Economics and Business: Wu Yuesang
Beijing Tianhai Industry Co., Ltd.: Zhang Baoguo
National Gas Cylinder Standardization Technical Committee: Huang
Qianghua, Wu Yan, Wu Hong, Liu Shouzheng
China Special Equipment Inspection and Research Institute: Bo Ke, Liang
Lin
Shanghai Special Equipment Supervisory inspection Technology Research
Institute: Sun Li
Shanghai Quality and Technical Supervision Bureau: Tan Jiuke
Sichuan Bureau of Quality and Technical Supervision: Liao Yang
Huizhou Quality and Technical Supervision Bureau: Pan Xianghua
Zhejiang Jindun Pressure Vessel Co., Ltd.: Ma Xiakang, Yin Xieping
Zhejiang University Institute of Chemical Machinery: Zheng Jinyang
Shijiazhuang Anruike Gas Machinery Co., Ltd.: Wang Hongxia
Supervision regulation on
safety technology for gas cylinder
1 General
1.1 Purpose
In order to ensure the safety of gas cylinders, protect the safety of people and
property, promote the development of the national economy, this Regulation is
hereby formulated in accordance with the “Law on Safety of Special Equipment”
and “Provisions on Safety Supervision of Special Equipment”.
1.2 Scope of application
This procedure is applicable to the seamless gas cylinders, welded gas
cylinders, welded insulated gas cylinders, wound gas cylinders, gas cylinders
filled with fillers, gas cylinder accessories which is used at a normal ambient
temperature of (-40°C ~ 60°C, note 1-1), nominal volume of 0.4 L ~ 3000 L,
nominal working pressure of 0.2 MPa ~ 35 MPa (gauge pressure, the same
below), has a product of pressure multiplied by volume of more than or equal
to 1.0 MPa • L, contains compressed gas, high (low) pressure liquefied gas,
low-temperature liquefied gas, dissolved gas, adsorbed gas, liquid with a
normal boiling point of equal to or less than 60°C, mixed gas (two or more than
two kinds of gases).
The materials, design, manufacture of gas cylinders for fire extinguishers, large-
volume gas cylinders used for long tube trailers and tube bundle containers, or
large-volume gas cylinders for electronic gas are in accordance with this
Regulation.
The main gas cylinder varieties, variety codes, corresponding product
standards as covered by this Regulation are as shown in Appendix A.
Note 1-1: The ambient temperature range of gas cylinders for vehicles and fire
extinguishers shall be in accordance with the relevant standards.
1.3 Special provisions on the scope of application
The cylinder accessories in the scope of application in clause 1.2 of this
Regulation shall, in addition to complying with this Regulation, also comply with
the provisions of the “Gas cylinder appurtenances safety and technical
supervision regulation” (TSG RF001). The gas cylinders for vehicles (Note 1-2)
shall, in addition to complying with this Regulation, also comply with the
provisions of the “Gas cylinders safety and technical supervision regulation for
vehicles” (TSG R0009).
Note 1-2: The gas cylinders for vehicles as covered in this Regulation refer to the gas
cylinders used to contain vehicle fuels (such as compressed natural gas, liquefied
natural gas, hydrogen, liquefied petroleum gas, liquefied dimethyl ether, etc.).
1.4 Scope of non-application
This Regulation does not apply to gas cylinders for fire extinguishers that are
only subjected to transient pressure during firefighting and are not subject to
pressure during storage, fixed-use cylinder-type pressure vessels, gas
cylinders for military equipment, nuclear facilities, aerospace vehicles, railway
locomotives, offshore installations and ships, special equipment for civil airports.
1.5 Relationship with standards and management systems
This Regulation specifies the basic safety requirements for gas cylinders. The
technical standards and management systems for gas cylinders shall comply
with the provisions of this Regulation.
The design, manufacture, filling, inspection of gas cylinders (including gas
cylinder’s accessories) shall comply with the corresponding standards as
specified in this Regulation. When there are no corresponding national
standards, industrial standards, or the case where it is beyond the current
national standards and industrial standards due to the adoption of new
materials, new technologies, new processes, it shall establish enterprise
standards. Enterprise standards shall be formulated by using or referring to
international standards (or advanced foreign standards); comply with the
requirements of Chinese laws and regulations and safety technical
specifications; fully seek the opinions of relevant competent authorities and
relevant organizations and institutions such as manufacturing, filling, inspection,
use. The content of the enterprise standard beyond the provisions of this
Regulation shall be subject to the standard review by the national gas cylinder
standardization technical organization. Meanwhile it shall follow the Appendix A
of this Regulation to define the variety code of the gas cylinder.
1.6 Special treatment for inconsistency with this Regulation
When the gas cylinders which use new materials, new technologies, new
processes, or otherwise has special requirements for use, are inconsistent with
the requirements of this Regulation, the manufacturing organization shall report
to the AQSIQ. The reporting data includes at least the basis, data, results of
relevant design, research, test, as well as the reviewed enterprise standards
and their type test reports. The AQSIQ entrusts relevant professional and
technical institutions to conduct technical review. Only after the results of the
review are approved by the AQSIQ, it allows to formally put into production and
use. The product standards on which the product is manufactured and type
tested shall comply with the provisions of 1.5 of this Regulation.
1.7 Identification of design document and type test
Cylinder products shall, according to the requirements of “Gas Cylinder Design
Documents Appraisal Regulation” (TSG R1003) and “Regulation for Type Test
of Gas Cylinders” (TSG R7002), be subjected to identification of design
documents of gas cylinder products and type test. After being qualified, the
design documents can be used for manufacturing. For the gas cylinder’s
accessories as configured for the gas cylinder, if there is requirements in the
safety technical specifications and the corresponding standards, it shall first be
subjected to the type test of the accessories, then the gas cylinder.
1.8 Imported gas cylinder
The imported gas cylinders shall, in addition to complying with the relevant
provisions on the inspection of import and export commodities, also meet the
requirements of this clause.
1.8.1 Manufacturing license
The overseas manufacturing organization of the imported gas cylinder shall
meet the requirements of 1.7 of this Regulation and obtain the corresponding
manufacturing license for special equipment in China.
1.8.2 Specifications and corresponding standards for design and
manufacture
All types of imported gas cylinders used in China shall meet the following
requirements:
(1) Design and manufacture comply with China's safety technical
specifications;
(2) For gas cylinder products without Chinese national standards, or
otherwise the scope of application and technical requirements of the
standards used differ from the Chinese national standards, the gas
cylinder product’s standards shall be evaluated by the relevant
professional technical institutions as commissioned by the AQSIQ.
1.8.3 Supervisory inspection of safety performance of imported gas
cylinders
The imported gas cylinders shall be subject to the supervisory inspection of
safety performance by the special equipment inspection agency (hereinafter
referred to as the supervisory inspection agency) with the supervisory
inspection qualifications, with inspection reports. The standards on which the
inspections are based shall comply with the provisions of 1.8.2 of this
Regulation, of which the manufacturing mark, exit-factory information and
documents of the imported gas cylinder shall also comply with the provisions of
1.14.1 and 4.10 of this Regulation.
1.8.4 Temporary imported gas cylinders
Temporary imported gas cylinders refer to cylinders as imported domestically,
filled, then exported overseas, or otherwise the gas cylinders as filled overseas,
imported domestically, then exported to the overseas manufacturing enterprise
after the gas in the cylinder is exhausted. It shall comply with the following
requirements:
(1) For organizations that are temporarily importing gas cylinders, it is
necessary to provide the safety performance certificate as issued by the
inspection agency which is approved officially by the country (or region)
wherein the property right of the gas cylinder is located to the supervisory-
inspection institute of the imported location;
(2) The supervisory inspection agency will inspect the safety performance of
the temporarily imported gas cylinders and issue the inspection report. For
the gas cylinders which require repeated entry but cannot be tested for
safety performance at the time of entry, they shall, after the gas in the
cylinder is exhausted, be subjected to the inspection of safety
performance. For gas cylinders that cannot be internally inspected due to
gas characteristics, etc., the importing organization shall provide the valid
inspection certificate as issued by the inspection agency of the country (or
region) where the gas cylinder’s property rights are located, and only after
confirmation by the supervisory inspection agency, it can only perform the
appearance inspection and determination of wall thickness, with
corresponding inspection reports. Gas cylinders that fail in the inspection
(or appearance inspection, determination of wall thickness) shall not be
used in China;
(3) The gas cylinders which are in the validity period of the safety
performance inspection report as issued by the supervisory inspection
agency may not be tested for safety performance when leaving the
country or re-entry;
(4) For gas cylinders that have only undergone appearance inspection and
determination of wall thickness, in case of re-entry, it shall follow the
requirements of item (2) of this clause to perform the inspection of safety
performance or appearance inspection and determination of wall
thickness;
(5) Organizations involved in the temporary import of gas cylinders shall
establish temporary archives of imported gas cylinders.
1.9 Exported back gas cylinder
Where the exported cylinder is returned back to China for use, its manufacturing
organization shall obtain the corresponding special equipment manufacturing
permit in China, meanwhile meet the requirements of the standard review,
identification of design documents of gas cylinder, type test of the imported gas
cylinders in clause 1.5 and 1.8 of this Regulation.
1.10 Cylindered gas medium
Cylindered gas medium is divided into the following types:
(1) Compressed gas: It refers to a gas that is completely gaseous after being
pressurized at -50°C, including a gas which has a critical temperature (Tc)
lower than or equal to -50°C, which is also called a permanent gas;
(2) High (low) pressure liquefied gas: It refers to a gas that is partially liquid
after pressurization at a temperature higher than -50°C, including high-
pressure liquefied gas which has a critical temperature (Tc) of -50°C ~
65°C, as well as low-pressure liquefied gas which has a critical
temperature (Tc) of above 65°C;
(3) Low-temperature liquefied gas: It refers to a gas that is partially liquid due
to cryogenic low-temperature during transportation. Those which has a
critical temperature (Tc) of generally lower than or equal to -50°C are also
known as cryogenic liquefied gas or refrigerated liquefied gas;
(4) Dissolved gas: It refers to the gas that dissolves in a solvent under
pressure;
(5) Adsorbed gas: It refers to the gas that is adsorbed to the adsorbent under
pressure.
1.11 Nominal working pressure of gas cylinder
(1) The nominal working pressure of a gas cylinder which contains
compressed gas refers to the defined (charging) pressure when the gas
in the cylinder reaches a completely uniform state at the reference
temperature (20°C);
(2) The nominal working pressure of a gas cylinder which contains liquefied
gas refers to the upper limit of the gas pressure in the cylinder at a
temperature of 60°C;
(3) The nominal working pressure of a gas cylinder which contains dissolved
gas refers to the standing pressure (at 15°C) of the gas in the gas cylinder
under chemical, thermal and diffusion equilibrium conditions;
(4) The nominal working pressure of the welded insulated gas cylinder refers
to the highest pressure that can be reached in the gas phase at the top of
the liner under normal working conditions of the gas cylinder;
(5) The nominal working pressure of the gas cylinder which contains liquids
with a standard boiling point of equal to or lower than 60°C and mixed gas
shall be as specified by the relevant standards.
The selection of the nominal working pressure of the gas cylinder shall be in
accordance with the provisions of 3.6 of this Regulation.
1.12 Classification of cylinders
1.12.1 Classification by nominal working pressure
Gas cylinders are divided into high-pressure gas cylinders and low-pressure
gas cylinders according to the nominal working pressure:
(1) High-pressure gas cylinder refers to a gas cylinder which has a nominal
working pressure of more than or equal to 10 MPa;
(2) Low-pressure gas cylinder refers to a gas cylinder which has a nominal
working pressure of less than 10 MPa.
1.12.2 Classification by nominal volume
Gas cylinders are divided into small-volume, medium-volume, large-volume
cylinders by the nominal volume:
(1) Small-volume gas cylinder refers to a gas cylinder which has a nominal
volume is less than or equal to 12 L;
(2) Medium-volume gas cylinder refers to a gas cylinder which has a nominal
volume of more than 12 L and less than or equal to 150 L;
(3) Large-volume gas cylinder refers to a gas cylinder which has a nominal
volume of more than 150 L.
1.13 Special requirements for gas cylinder
Gas cylinders which contain a single gas must be dedicated. It is only allowed
to be filled with the gas consistent with the manufacturing mark. It shall neither
change the gas cylinder’s manufacturing mark and its use, nor mix other gases
or add additives.
The gas cylinder which contains the mixed gas must be filled with the mixed
gas of the same characteristics (Note 1-3), according to the gas characteristics
as determined based on the gas cylinder’s mark. It is not allowed to modify a
single gas or a mixed gas of different characteristics.
Note 1-3: Gas characteristics refer to toxic (T), oxidized (O), flammable (F), corrosive
(C).
1.14 Gas cylinder’s mark
The gas cylinder’s mark includes a manufacturing mark and a periodic
inspection mark. Manufacturing marks usually have a manufacturing stencils
mark (including the mark on the nameplate), a label mark (applied on the
cylinder or under a transparent protective layer), a printed mark (printed on the
cylinder), a gas cylinder’s color mark; etc. The periodic inspection marks
generally include inspection stencils marks, label marks, inspection mark rings,
inspection color codes. On the gas cylinder which is used to supply fuel to taxi,
it shall have a permanent taxi identification mark (Note 1-4).
Note 1-4: For cylinders used for supplying fuel to taxi, the cylinder’s manufacturing
organization, installation organization or periodic inspection agency shall, after
confirming the purpose of gas cylinder, make a permanent mark of “TAXI” which is
representative of Taxi at the prominent position of the gas cylinder’s mark (steel gas
cylinders use stencils; wrapped gas cylinders use resin-covered labels).
1.14.1 Gas cylinder’s manufacturing mark
1.14.1.1 Stencils marks, label marks or printed marks of gas cylinders
The manufacturing mark of the gas cylinder is the basis for identifying the gas
cylinder. The arrangement and content of the marking shall comply with the
provisions of Appendix B of this Regulation and corresponding standards.
Among them, the manufacturing organization’s code (such as letters, patterns,
etc.) shall be reported to the China Gas Cylinder Standardization Organization
for future reference.
The manufacturing organization shall, in accordance with the provisions of the
corresponding standards, make a permanent manufacturing mark on each gas
cylinder. Steel gas cylinders or aluminum alloy gas cylinders use stencils.
Wrapped gas cylinders use plastic-sealed gas cylinders. Non-refillable gas
cylinders are printed on cylinders. Welded insulated gas cylinders (including
automotive welded insulated cylinders) and liquefied petroleum gas cylinders
are identified by the embossed letter or welding-sealed nameplate.
Other products that cannot be marked by the previous method shall use the
marking method which complies with the corresponding standards for gas
cylinder products. The manufacturing organization shall consider the placement
requirements of the information label (bar code, QR code, RF label, etc.) of gas
cylinder at the time of design.
It is encouraged for the cylinder manufacturing organization or the filling
organization to implement the life cycle safety management of the gas cylinders
by means of information.
1.14.1.2 Color marks, typeface, color rings on the outer surface of gas
cylinder
The color mark, typeface, color ring on the outer surface of the gas cylinder
shall comply with the provisions of GB 7144 “Colored cylinder mark for gases”.
Where there are special requirements for color mark, typeface, color ring, it
shall comply with the requirements of the corresponding standards on gas
cylinder product. The color, typeface, color ring of gas cylinders which contain
gas and mixed gas that are not included in the national standard shall be clearly
defined by the national gas cylinder standardization technical organization.
Meanwhile it shall be implemented in accordance with the provisions of clause
1.5 of this Regulation.
When the liquefied petroleum gas filling organization uses the information label
to make management and has more than 300000 liquefied petroleum gas
cylinders of self-owned property rights, it shall emboss an obviously raised
property right marks on the upper head of the dedicated gas cylinders. The
organizations with property rights shall formulate enterprise standards such as
the special gas cylinder color marks or the valves and threads of special
structural forms. Such standards shall be reviewed by the national gas cylinder
standardization technical organization.
1.14.1.3 Marking of welded insulated gas cylinders (including automotive
welded insulated gas cylinders)
(1) For the gas cylinders which are filled with liquid oxygen (O2), nitrous oxide
(N2O), liquefied natural gas (LNG), on an eye-catching position at the
head of the outer package, it shall emboss the raised medium symbols
such as “O2” and “N2O” or “LNG”;
(2) The product nameplate shall be firmly welded to the non-removable
accessories;
(3) On the cylinder, it shall attach a product label which is consistent with the
medium as marked on the nameplate. The background color and text color
of the label shall be consistent with the cylinder’s color and text color of
the corresponding medium in GB 7144.
1.14.2 Periodic inspection mark of gas cylinder
The periodic inspection stencils mark, label mark, inspection mark ring,
inspection color code of the gas cylinder shall comply with the provisions of
Appendix B of this Regulation. The gas cylinder’s periodic inspection agency
shall stamp the inspection qualification stencils on the qualified gas cylinder or
make a permanent inspection qualification mark on the gas cylinder one by one.
1.15 Supervisory management
(1) The General Administration of Quality Supervision, Inspection and
Quarantine and the quality supervision departments at all levels are
responsible for the safety supervision of gas cylinders and supervise the
implementation of this Regulation;
(2) The design, manufacture, filling, inspection, use, etc. of gas cylinders
(including gas cylinder’s accessories) shall strictly implement the
provisions of this Regulation;
(3) The manufacturing, filling, inspection agencies of gas cylinders shall, in
accordance with the safety technical specifications and corresponding
standards, promptly input relevant data on manufacturing, use registration,
filling, inspection into the relevant special equipment information
management system.
2 Materials
2.1 Basic requirements
(1) The selection of gas cylinder’s materials shall consider the mechanical
properties, chemical properties, process properties, compatibility with the
medium;
(2) The selection of gas cylinder’s materials shall meet the restrictive
requirements of the corresponding gas cylinder product standards for
materials. The gas cylinder’s materials shall also meet the requirements
of the corresponding material standards (Note 2-1);
(3) When selecting the metal materials which are not listed in the national
standard to manufacture the main part of the gas cylinder, it shall be
subject to technical review in accordance with the provisions of 1.6 of this
Regulation. The review shall focus on the relevant testing of materials, the
test data, the technical documents on trial production of materials
(including the technical conditions on product supply), etc.;
(4) The material’s manufacturing organization shall make a clear and firm
stencil mark on the obvious part of the material or use other methods of
marking;
(5) The material’s manufacturing organization shall provide the material
quality certificate to the material user. The content of the material’s quality
certificate shall be complete and clear; and shall have the quality
inspection seal of the material manufacturing organization;
(6) When the gas cylinder’s manufacturing organization obtains the materials
for gas cylinders from the non-material manufacturing organization, it shall
obtain the original copy of the quality certificate as provided by the material
manufacturer or the duplicated copy of the seal of the material supplier’s
official inspection seal and the seal of the responsible person;
(7) The cylinder’s manufacturing organization shall be responsible for the
authenticity, traceability, consistency of the selected cylinder material and
material’s quality certificate.
Note 2-1: The corresponding standards as mentioned in this Regulation refer to the
corresponding national standards, industrial standards or reviewed enterprise
standards.
2.2 Use of materials of overseas designations
(1) The materials of overseas designations shall be the materials permitted
by the overseas pressure vessel or the technical specifications for gas
cylinder safety and corresponding standards and have been used
overseas. For the materials which have corresponding technical
requirements, performance data, process, the technical requirements of
the materials shall not be lower than technical requirements for materials
of similar designations in domestic material standards (such as
phosphorus, sulfur content, sampling location for impact specimens,
sampling direction, impact energy index, elongation at break, etc.).
Meanwhile it shall not be lower than the requirements of this Regulation
and corresponding standards on gas cylinders in China;
(2) The scope of use of materials of overseas designations shall comply with
the provisions of the corresponding overseas product standards,
meanwhile it shall also comply with the provisions on the use of materials
of similar designations in the domestic material standards;
(3) The material’s quality certificate shall comply with the provisions of clause
2.1 of this Regulation;
(4) Before using the overseas materials to manufacture gas cylinders, the
gas cylinder’s manufacturing organization shall carry out process tests
(such as cold-hot processing test, evaluation of welding and heat
treatment process) according to the corresponding requirements for the
product manufacturing process, meanwhile formulate corresponding
technical documents;
(5) For the materials of overseas designations that have mature experience
of use, if they are widely used domestically, they can be directly included
in the corresponding standards on gas cylinder product.
2.3 Use of material and transplantation of mark
2.3.1 Basic requirements
(1) The gas cylinder’s manufacturing organization shall review the material
quality certificate and material mark of the incoming materials; verify and
analyze the chemical composition of the metal materials which are used
to make the gas cylinders according to the furnace number; carry out
verification and inspection of the mechanical properties according to the
batch number (except for the mechanical properties of steel pipes, steel
billets, etc., which are determined by heat treatment); carry out non-
destructive testing according to the relevant standards (except for
seamless steel pipes which has been subjected to 100% ultrasonic non-
destructive testing by steel mills) and verification inspection of low-fold
organization;
(2) All inspections and tests may be used after being confirmed of complying
with the provisions of this Regulation and its corresponding material
standards;
(3) The materials used to manufacture the pressure components of the gas
cylinders shall be subjected to mark transplantation according to relevant
regulations.
2.3.2 Performance requirements
2.3.2.1 General requirements
(1) The chemical composition and mechanical properties of the cylinder
material shall meet the requirements of the corresponding standards on
gas cylinder products;
(2) The materials for the steel gas cylinders and steel liners shall be
elemental age-resisting killed steels as smelted in electric furnaces or
oxygen converters;
(3) The materials for the aluminum alloy gas cylinders and aluminum alloy
liners shall have good resistance to intergranular corrosion and comply
with the relevant standards;
(4) High-quality carbon steel, alloy steel or aluminum alloy billets for
seamless gas cylinders shall be suitable for pressure processing;
(5) The cylinder material used for welded gas cylinders shall have good
calendaring and welding properties;
(6) The low-temperature impact performance of the materials for steel gas
cylinder shall comply with the provisions of the corresponding standards;
(7) For the materials for steel gas cylinders which contain stress-corrosion-
prone medium, it shall control the actual tensile strength of the material to
be not more than 880 MPa;
(8) For the materials for steel gas cylinders which contain hydrogen or other
brittle-inducing medium, it shall control the actual tensile strength of the
material to be not more than 880 MPa. When the actual yield ratio is not
more than 0.9, if the nominal working pressure of the gas cylinder is not
more than 20 MPa, it allows the actual tensile strength of the material to
increase to 950 MPa.
2.3.2.2 Materials for compressed natural gas cylinders or steel liners for
vehicles, materials for steel seamless gas cylinders containing
compressed natural gas
When the actual tensile strength of the material is more than 880 MPa, it shall
meet the following requirements:
(1) Under the condition of strictly controlling the content of sulfur, phosphorus
and other components, if using the hydrogen sulfide stress corrosion test
(stress ring method) as specified by the corresponding standard, it allows
for the actual tensile strength of the materials to increase to 950 MPa, the
test results are included in the identification report of the design
documents of gas cylinder and the type test report;
(2) During the manufacturing process, the actual contents of sulfur,
phosphorus and other components of the material as well as the actual
tensile strength after heat treatment shall not exceed the content of sulfur
and phosphorus as well as the control range of tensile strength of the
specimen materials in the test report of the hydrogen sulfide stress
corrosion test;
(3) The material processing organization shall provide the cylinder
manufacturing organization with the quality certificate of the steel billet
which is used by the billet production organization as well as the quality
certificate of the hot rolled tube or cold drawn tube as issued by the
material processing organization;
(4) In case of change of the designation, production organization, smelting
method, hot processing method, etc., of the materials, it shall carry out the
hydrogen sulfide stress corrosion test again.
2.3.2.3 Long tube trailer, bundle container
2.3.2.3.1 Materials for large-volume steel seamless gas cylinder
(1) In the case of brittle-inducing and stress corrosion-prone gases such as
hydrogen, natural gas or methane, the actual tensile strength of the
material after heat treatment shall not exceed 880 MPa, the yield ratio
shall not exceed 0.86, the elongation at break (A50mm) shall not be less
than 20%;
(2) In case of containing other gases than those as listed in item (1) of this
clause, the actual tensile strength of the material after heat treatment shall
be not more than 1060 MPa, the yield ratio shall not be more than 0.90,
the elongation at break (A50mm) shall not be less than 16%.
2.3.2.3.2 Materials for the liner of wrapped gas cylinder
The mechanical properties after heat treatment shall comply with the
requirements of relevant standards.
2.3.3 Requirements for material compatibility
(1) All metal or non-metallic materials of gas cylinder in contact with the
contained gas shall be compatible with the gas they are filled with;
(2) Aluminum alloy gas cylinders shall not be used for the filling of chlorine,
hydrogen bromide, carbonyl dichloride, hydrogen fluoride, methyl chloride
or methyl bromide;
(3) For gas cylinders which contain carbon monoxide, it is preferably to use
aluminum alloy gas cylinders or stainless-steel gas cylinders. If using the
carbon steel gas cylinders, the filling organization must have measures to
ensure control of the moisture and carbon dioxide content of the filled
medium and ensure that the limited filling pressure at 20°C is not more
than 50% of its nominal working pressure;
(4) Gas cylinders which contain fluorine or difluorinated oxygen shall be of
steel seamless gas cylinders;
(5) For gas cylinders which contain medical oxygen, it is preferably to use
aluminum alloy gas cylinders or stainless-steel gas cylinders.
3 Design
3.1 Thickness of cylinders
The design method used to determine the wall thickness of the gas cylinder
shall comply with the relevant standards. The design of the cylinder body of the
fiber-wrapped gas cylinder shall adopt the stress analysis design method.
3.2 Hydraulic test pressure and pneumatic test pressure of gas cylinder
(1) The hydraulic test pressure of the gas cylinder is generally 1.5 times of
the nominal working pressure. When the corresponding standard has
special requirements on the test pressure, it shall be implemented
according to such requirements;
(2) For gas cylinders that cannot be hydrostatically tested, if using the
pneumatic test, the test pressure shall be in accordance with the
requirements of relevant standards.
3.3 Airtightness test pressure of gas cylinder
The airtightness test pressure of gas cylinder is generally the nominal working
pressure. When the corresponding standard has special requirements on the
airtightness test pressure, it shall be implemented according to such
requirements.
3.4 Actual bursting safety factor of gas cylinder
The actual bursting safety factor of the gas cylinder is the ratio of the actual
hydraulic bursting test pressure to the nominal working pressure, which shall
be more than or equal to the requirements of Table 3-1.
Table 3-1 -- Actual bursting safety factor of gas cylinders (Note 3-1)
Main types Actual bursting safety factor
Steel seamless gas cylinders (including compressed natural gas cylinders for vehicles
and steel seamless gas cylinders for fire extinguishers) 2.4 Aluminum alloy seamless gas cylinder (including aluminum alloy seamless gas cylinder
for fire extinguisher)
Large-volume steel seamless gas cylinder for long-tube trailer and tube-bundle
container 2.5
Steel liner glass fiberglass hoop-wrapped gas cylinder for vehicle
Industrial non-refillable welded steel gas cylinder 2.0 (Note 3-2)
Aluminum alloy liner carbon fiber full-wrapped gas cylinder for respirator 3.4
Steel welded gas cylinders (including steel welded gas cylinders for fire extinguishers,
excluding welded insulated gas cylinders) 3.0 (Note 3-3)
Automotive aluminum alloy liner carbon fiber full-wrapped gas cylinder 2.35 Automotive steel liner carbon fiber and aramid fiber hoop-wrapped gas cylinder
Note 3-1: The types of gas cylinders as not listed in Table 3-1 are determined according
to the corresponding standards.
Note 3-2: It is actual burst pressure/test pressure.
Note 3-3: The actual burst pressure is not less than 5 MPa.
3.5 Yield strength and tensile strength of metal materials for gas cylinder
When designing a gas cylinder, the yield strength and tensile strength of the
metal material of the cylinder body shall be selected from the lower limit value
specified by the material standard or the guaranteed value of heat treatment.
The ratio of the design value of the yield strength to the tensile strength (yield
ratio) shall not be more than that as specified in Table 3-2. For those outside
the scope of Table 3-2, it shall follow the provisions of the corresponding
standards.
Table 3-2 -- Ratio of design value of yield strength to tensile strength of
metal materials of cylinder
Type and material of structure Heat treatment method Yield strength / tensile strength
Seamless
structure
Steel
Normalizing or
normalizing + tempering 0.75
Quenching + tempering 0.85 (Note 3-4)
Aluminum alloy Solution treatment 0.85
Steel liner of automobile hoop-
wrapped gas cylinder Quenching + tempering 0.90
Welded structure Steel Normalizing or annealing 0.80
Note 3-4: Large-volume steel seamless gas cylinders for long-tube trailers and tube-
bundle containers or their steel liners are in accordance with the requirements of
relevant standards.
3.6 Nominal working pressure
3.6.1 General provisions
When designing a gas cylinder, the selection of the nominal working pressure
generally takes precedence over the integer series. The nominal working
pressure of the commonly used gas cylinders is as specified in Table 3-3 and
Table 3-4. For the gas cylinders used for special requirements, the nominal
working pressure is allowed to exceed the pressure levels as specified in Table
3-3 and Table 3-4. However, it shall meet the provisions of 3.6.2 of this
Regulation.
Table 3-3 -- Nominal working pressure for gas cylinders containing
common gas
Type of gas Nominal working pressure (MPa) Commonly used gas
Compressed
gas
Tc ≤ -50°C
35 Air, hydrogen, nitrogen, argon, helium, neon
30 Air, hydrogen, nitrogen, argon, helium, neon, methane, natural gas
20 Air, oxygen, hydrogen, nitrogen, argon, helium, neon, methane, natural gas
15
Air, oxygen, hydrogen, nitrogen, argon, helium, neon, methane,
carbon monoxide, nitrogen monoxide, ruthenium, osmium (heavy
hydrogen), fluorine, oxygen difluoride
High-pressure
liquified gas -
50°C ≤ Tc ≤
65°C
20 Carbon dioxide (carbonated gas), ethane, ethylene
15
Carbon dioxide (carbonated gas), nitrous oxide (laughing gas, nitrous
oxide), ethane, ethylene, silane (tetrahydrosilane), phosphorane
(phosphine), boroethane (diborane), etc.
12.5
Xenon, nitrous oxide (laughing gas, nitrous oxide), sulfur
hexafluoride, hydrogen chloride (anhydrous hydrochloric acid),
ethane, ethylene, trifluoromethane (R23), hexafluoroethane (R116),
1,1-difluoroethylene (vinylidene fluoride, R1132a), vinyl fluoride
(vinyl fluoride, R1141), nitrogen trifluoride, etc.
Table 3-3 (continued)
Type of gas Nominal working pressure (MPa) Commonly used gas
Low-pressure
liquified gas
and mixed gas
Tc > 65°C
5 Hydrogen bromide (anhydrous chlorobromide), hydrogen sulfide, carbonyl dichloride (phosgene), sulfuryl fluoride, etc.
4 Difluoromethane (R32), pentafluoroethane (R125), bromotrifluoromethane (R13B1), R410A, etc.
3 Ammonia, chlorodifluoromethane (R22), 1,1,1-trifluoroethane (R143a), R407C, R404A, R507A, etc.
2.5 Propylene
2.2 Propane
2.1 Liquefied petroleum gas
Chlorine, sulfur dioxide, nitrogen dioxide (nitrogen tetroxide),
hydrogen fluoride (anhydrous hydrofluoric acid), cyclopropane,
hexafluoropropylene (R1216), difluoroethane (R152a),
chlorotrifluoroethylene (R1113), Methyl chloride (methyl chloride),
methyl bromide (methyl bromide), 1,1,1,2-tetrafluoroethane (R134a),
heptafluoropropane (R227e), 2,3,3,3-tetrafluoropropene (R1234yf) ,
R406A, R401A, etc.
1.6 Dimethyl ether
N-butane (butane), isobutane, isobutylene, 1-butene, 1,3-butadiene
(dibutene), dichlorofluoromethane (R21), chlorodifluoroethane
(R142b), bromine chlorofluoromethane (R12B1), chloroethane (ethyl
chloride), vinyl chloride, bromethylene (vinyl bromide), methylamine,
dimethylamine, trimethylamine, ethylamine (aminoethane),
methoxyethene (vinyl methyl ether), oxirane (ethylene oxide), (cis)2-
butene, (trans)2-butene, octafluorocyclobutane (RC318), boron
trichloride (boron chloride) ), methyl mercaptan (sulfurmethane),
chlorotrifluoroethane (R133a), etc.
Low-pressure
liquified gas
Tc ≤ -50°C
- Liquefied air, liquid argon, liquid helium, liquid neon, liquid nitrogen, liquid oxygen, liquid hydrogen, liquefied natural gas
Table 3-4 -- Nominal working pressure of gas cylinders for fire
extinguisher containing commonly used gas
Type of gas Nominal working pressure (MPa) Commonly used gas
Compressed
gas and mixed
gas
23.2 IG-01 (argon), IG-100 (nitrogen), IG-55 (argon, nitrogen), IG-541(argon, nitrogen, carbon dioxide)
17.2 IG-01 (argon), IG-100 (nitrogen), IG-55 (argon, nitrogen), IG-541(argon, nitrogen, carbon dioxide)
2.0 Dry powder fire extinguishing agent + nitrogen 1.4
High-pressure
liquified gas
15 Carbon dioxide
13.7 Trifluoromethane
Low-pressure
liquified gas
and mixed gas
8.0
Heptafluoropropane + nitrogen
6.7
5.3
4.2
2.5
4.0
Hexafluoropropane + nitrogen 3.2 2.6
1.3
Low-pressure
liquified gas
and mixed gas
4.3
Haloalkane 1301 + nitrogen 3.2
2.8
3.6.2 Special requirements
(1) For gas cylinders which contain high-pressure liquefied gas, under the
specified filling factor, the nominal working pressure shall not be less than
the highest temperature-rising pressure of the filled gas at 60°C; and shall
not be less than 10 MPa. For the gas cylinder which contains low-pressure
liquified gas, the nominal working pressure shall not be less than the
saturated vapor pressure of the filled gas at 60°C and shall not be less
than 1 MPa. For the gas cylinder which contains the low-pressure liquefied
gas whose toxicity is highly toxic, the selection of the nominal working
pressure shall generally refer to LC50 in Appendix C, making appropriate
improvement based on the saturated vapor pressure at 60°C;
(2) The saturated vapor pressure value of the low-pressure liquefied gas at
60°C may be provided in accordance with Appendix C or the
corresponding gas standard. Where it is not specified in Appendix C or the
corresponding gas standard, it may use the relevant data as provided by
gas manufacturing organization and officially confirmed;
(3) For gas cylinders which contain low-temperature liquefied gas, the
nominal working pressure shall be determined according to the process
requirements, but shall be more than or equal to 0.2 MPa and less than
or equal to 3.5 MPa;
(4) For the mixed gas of low-pressure liquefied gas, it shall follow the
corresponding gas standards to determine the saturated vapor pressure
of the mixed gas at 60°C. For the mixed gas as composed of the
compressed gas and low-pressure liquefied gas for the fire extinguishing
system, the nominal working pressure shall be not less than the maximum
working pressure of the fire extinguishing system at the corresponding
temperature as specified in the corresponding standard;
(5) For gas cylinders which contain fluorine and difluorinated oxygen, the
nominal working pressure shall be not less than 15 MPa.
3.7 Wrapped cylinder liner and wrapping material
(1) The inner liner of the high-pressure wrapped gas cylinder which contains
flammable gas shall be made of metal materials such as steel or aluminum
alloy; the wrapping material shall be glass fiber, aramid fiber or carbon
fiber;
(2) The carrier layer of the wrapped gas cylinder shall be hoop-wrapped or
fully wrapped by a single fiber. It shall not be wrapped by mixing more than
two (inclusive) types of fibers.
3.8 Design service life
The manufacturing organization shall specify the design service life of the gas
cylinder and indicate it on the design file of the gas cylinder and the gas
cylinder’s mark. The design service life of the gas cylinder shall not be less than
that specified in Table 3-5. If the manufacturing organization determines the
design service life beyond the provisions of Table 3-5, it shall be verified by the
corresponding type test, corrosion test, or otherwise increase the design
corrosion margin and verify it.
Table 3-5 -- Design service life of common gas cylinders (Note 3-5)
No. Type of gas cylinders Design service life (years)
1 Steel seamless gas cylinder 30
2 Steel welded gas cylinder (Note 3-6)
20
3 Aluminum alloy seamless gas cylinder
4 Large-volume steel seamless gas cylinder for long-tube trailer and tube-bundle container
5 Dissolved acetylene gas cylinder and adsorption natural gas welded steel gas cylinder
6 Compressed natural gas cylinder for vehicles
15
7 Liquefied petroleum gas cylinder for vehicles and liquefied dimethyl ether cylinder for vehicles
8 Steel inner liner fiberglass hoop-wrapped gas cylinder
9 Aluminum alloy inner liner fiber fully wrapped gas cylinder
10 Aluminum alloy inner liner fiber hoop-wrapped gas cylinder
11 Steel seamless gas cylinders and steel welded gas cylinders which contain corrosive gases or are used in corrosive environments such as the sea 12
Note 3-5: The types of gas cylinders as not listed in Table 3-5 are determined according
to the corresponding standards.
Note 3-6: It does not include liquefied petroleum gas cylinders or liquefied dimethyl
ether gas cylinders.
3.9 Structure of gas cylinder
3.9.1 Basic requirements
(1) The cylinder body of high-pressure gas cylinder and the metal liner of the
wrapped gas cylinder shall adopt a seamless structure. The cylinder body
of the low-pressure gas cylinder adopts a welded structure or a seamless
structure;
(2) The connection between the seamless gas cylinder’s body and the non-
removable accessories shall not be welded. The connection between the
welded gas cylinder’s body and the non-removable accessories shall be
welded.
3.9.2 Bottom structure of seamless gas cylinder
The bottom structure and size of the seamless gas cylinder shall, in addition to
complying with the requirements of the corresponding national standards, also
meet the following requirements:
(1) The connection between the convex bottom and the cylinder body is
smoothly transitioned, the thickness of which shall be not less than the
design thickness of the cylinder body;
(2) There is a transition between the ring shell of the concave bottom and the
cylinder body. The connection between the transition section and the
cylinder body is smoothly transitioned.
3.9.3 Body structure of welded gas cylinder
Steel welded gas cylinders have not more than one longitudinal weld and not
more than two circumferential welds. The form of welded joint of the cylinder
weld (including longitudinal and circumferential welds) shall comply with the
requirements of relevant standards.
3.9.4 High-pressure gas cylinders for filling low-pressure liquefied gases
Gas cylinder’s design requirements and gas cylinder’s mark shall comply with
the relevant standards for high-pressure gas cylinders.
3.9.5 Large-volume gas cylinders for long-tube trailers and tube-bundle
containers
It shall meet the following requirements:
(1) The connection between the gas cylinder and the running gear or the
container’s frame shall not adopt the welded structure. It must take reliable
measures to prevent the circumferential rotation and axial movement of
the cylinder during use;
(2) The support and fixing device between the gas cylinders have sufficient
rigidity, whilst avoiding the thermal expansion and contraction, which
adversely affects the stress of the cylinder.
3.9.6 Liquefied natural gas welded insulated gas cylinders for vehicles
It shall use the large-volume cylinders as specified in clause 1.12.2 of this
Regulation.
4 Manufacture
4.1 Manufacturing conditions
The gas cylinder’s manufacturing organization shall obtain the corresponding
special equipment manufacturing license. The manufacturing organization of
medium and small-volume gas cylinders shall have a gas cylinder production
line. The manufacturing organization of large-volume gas cylinders shall have
independent gas cylinder’s manufacturing sites and facilities.
4.2 Batching and batch size of gas cylinders
4.2.1 Batching
Gas cylinders shall be manufactured in batches. the batching of gas cylinders
shall comply with the following provisions:
(1) Seamless gas cylinders shall be batched according to the same design,
the same furnace of tank material, the same manufacturing process, the
same furnace according to the same heat treatment specification, the
continuous heat treatment;
(2) Welded gas cylinders shall be batched according to the same design, the
same material designation, the same welding procedure, and heat
treatment according to the same specification;
(3) Wrapped gas cylinders: The metal inner liners are batched according to
the provisions of item (1) of this Regulation. The finished gas cylinders are
batched according to the same specifications, the same design, the same
manufacturing process, the same composite material model in continuous
manufacturing;
(4) Welded insulated gas cylinders (including welded insulated gas cylinders
for vehicles), which are batched according to the same design, the same
material designation, the same welding process, the same adiabatic
process conditions;
(5) The cylinder body of the dissolved acetylene gas cylinder shall be
batched according to the provisions of items (1) or (2) of this clause. The
dissolved acetylene gas cylinder shall be batched according to the same
design, the same specification, the same filler formula, the same
manufacturing process in continuous manufacturing.
4.2.2 Batch size
(1) The batch size of small-volume gas cylinders shall generally not exceed
200 plus the number used for destructive tests;
(2) The batch size of medium-volume gas cylinders shall generally not
exceed 500 plus the number used for destructive tests;
(3) The batch size of large-volume gas cylinders shall generally not exceed
50 plus the number used for destructive tests.
Where product standards have special provisions, they shall be implemented
in accordance with the provisions of product standards.
4.3 Bottom-closing and mouth-closing of tube-made gas cylinder
Steel seamless gas cylinders made by tube through bottom-closing shall be
subjected to process evaluation. In the bottom-closing forming process, it shall
not add metals. For the tube-made gas cylinder that may be exempted of overall
airtightness test of gas cylinder according to the corresponding standards, it
shall, before mouth-closing, take reliable measures to carry out the bottom
airtightness test.
4.4 Welding
(1) The pressure-bearing welds for the longitudinal and circumferential welds
of the welded cylinder body as well as the valve seat and the cylinder body
shall be automatically welded;
(2) The welding work of the gas cylinder shall be carried out in a room where
the relative humidity is not more than 90% and the temperature is not
lower than 0°C;
(3) The manufacturing organization shall carry out the welding procedure
evaluation, formulate the welding procedure specification and the weld
rework process requirements, which shall comply with the provisions of
the corresponding standards;
(4) Welders engaged in gas cylinder’s welding work shall pass the
examination of the “Examination rules for welding operators of special
equipment” (TSG Z6002) and obtain the welding qualification of the
corresponding project.
4.5 Heat treatment
(1) The heat treatment of the gas cylinder shall be carried out by integral heat
treatment. The heat treatment device shall ensure the uniformity of the
temperature distribution in the effective heating zone;
(2) The manufacturing organization shall carry out the heat treatment
process evaluation, formulate the heat treatment process specification
and the repeated heat treatment process requirements, which shall
comply with the provisions of the corresponding standards;
(3) For gas cylinders that require heat treatment to ensure the mechanical
properties of the cylinder material, the heat treatment process shall ensure
the consistency of performance of different parts of the same product;
(4) For the welded gas cylinders subject to stress-relieving heat treatment, if
re-welded, it shall carry out heat treatment again.
4.6 Wrapped gas cylinder
4.6.1 Curing of fiber-wrapped gas cylinders
(1) The fiber-wrapped gas cylinder shall be subjected to the evaluation of the
curing system or the curing process. It shall follow the requirements of the
corresponding standards to formulate the curing process specification;
(2) It shall not alter the resin system and curing system determined by the
type test without authorization;
(3) For aluminum alloy inner liner cylinders, the curing temperature and time
shall not affect the performance of the inner liner.
4.6.2 Special requirements for manufacture of wrapped gas cylinders
The manufacturing organization of the wrapped cylinder shall have the ability
to produce the inner liner. The performance of the inner liner used in the
wrapped gas cylinder shall be consistent with the performance of the inner liner
for the type test of the cylinder. It shall not use the outsourced inner liner which
had not been subjected to permit and type test to produce the wrapped gas
cylinder.
4.7 Filler and solvent for dissolved acetylene gas cylinder
4.7.1 Filler
(1) It shall be of an integral structure and, in any case, it shall not chemically
react or cause damage to acetylene, solvents, gas cylinders or
accessories;
(2) Technical requirements such as porosity, compressive strength, surface
pores, gap between porous filler and gas cylinder wall, etc., shall comply
with the requirements of the corresponding standards.
4.7.2 Solvent
(1) In any case, the solvent shall neither be subjected to chemical reaction
with the filler, acetylene, gas cylinders or accessories, nor shall it affect
the product quality of acetylene;
(2) The quality of the solvent must ensure that, when the dissolved acetylene
gas cylinder is filled with a specified amount of solvent and acetylene, it
meets the requirements of the corresponding standard and is verified by
type test.
4.8 Non-destructive testing
(1) Non-destructive testing of weld on the welded gas cylinders shall adopt
X-ray filming or X-ray digital imaging testing methods. The testing ratio
and qualification level shall comply with the provisions of the
corresponding standards. When using local non-destructive testing, the
manufacturing organization shall also be responsible for the quality of the
non-tested part;
(2) Non-destructive testing of steel seamless gas cylinders shall be subjected
to the on-line ultrasonic automatic testing (except as otherwise specified
in the corresponding standards). The requirements of methods and testing
sensitivity shall comply with the requirements of the corresponding
standards. The scope of testing shall cover all testable parts. The parts
that cannot be covered shall use magnetic powder testing;
(3) Personnel engaged in non-destructive testing of gas cylinders shall be
subjected to evaluation according to the requirements of relevant safety
technical specifications, meanwhile obtain the corresponding qualification
certificates before they can undertake non-destructive testing work
corresponding to the types and grades of qualification certificates.
4.9 Inspection and testing of manufacturing quality
The inspection and testing items and requirements for the manufacture quality
of gas cylinders shall comply with the requirements of the corresponding
standards and meet the following requirements:
(1) Various test devices (such as X-ray digital imaging testing, hydraulic test
equipment for external test method, etc.) shall meet the requirements of
the corresponding standards;
(2) The hydraulic burst test shall use a test device capable of automatically
collecting and recording data of the pressure-influent curve;
(3) The seamless gas cylinder (except for small-volume gas cylinders) and
the metal inner liner wrapped gas cylinder shall use the external test
method (also known as water jacket method) for hydraulic test. Before the
test, it shall follow the requirements of relevant standards to calibrate the
test system. The standard cylinder used for calibration shall be used after
being calibrated. Other gas cylinders may use the internal test method to
carry out hydraulic test. The hydraulic test device shall be able to
automatically record cylinder number, time and test results in real time.
4.10 Exit-factory data
When the gas cylinder is exit-factory, the manufacturing organization shall issue
a product certificate one by one and a batch inspection quality certificate
according to the batch. The product certificate shall indicate the manufacturer's
name and manufacturing license number of the cylinder and the installed
cylinder valve. The content of the product certificate and the batch inspection
product quality certificate shall comply with the provisions of the corresponding
product standard, meanwhile it shall be signed or stamped by the
manufacturer's engineer who is responsible for inspection.
The product’s quality record, inspection report, batch inspection product quality
certificate and other documents shall be kept within the prescribed time limit.
For gas cylinders for vehicles, it is generally not less than 15 years. For other
gas cylinders, it is not less than 7 years. Manufacturers are encouraged to use
information technology to establish traceable exit-factory data, documentation,
manufacturing marks.
4.11 Supervisory inspection or product manufacture
The safety performance of the manufacturing process of gas cylinder products
shall be supervised and inspected by the supervisory inspection agency. The
supervisory inspection agency shall issue the “Certificate for supervisory
inspection of manufacture of gas cylinder products”. The gas cylinder products
which had been not subjected to supervisory inspection or failed to pass the
supervisory inspection shall not be exit-factory, sold, filled.
5 Accessories of gas cylinders
5.1 Range of accessories of gas cylinder
Gas cylinder’s accessories include gas cylinder valve, emergency ......
Related standard:   TSG 21-2016  TSG 24-2015
   
 
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