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TSG 23-2021 English PDF (TSG23-2021)

TSG 23-2021 English PDF (TSG23-2021)

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TSG 23-2021: Regulation on Safety Technology for Gas Cylinder

This Regulation is applicable to the seamless gas cylinders, welded gas cylinders, low temperature thermally insulated gas cylinders, wrapped fiber reinforced cylinder, gas cylinders with fillers, bundles of gas cylinders.
TSG 23-2021
TSG
TECHNICAL SPECIFICATION FOR
SAFETY OF SPECIAL EQUIPMENT
Regulation on safety technology for gas cylinder
ISSUED ON: JANUARY 04, 2021
IMPLEMENTED ON: JUNE 01, 2021
Issued by: State Administration for Market Regulation
Table of Contents
Foreword ... 5
1 General ... 7
2 Materials ... 13
3 Design ... 16
4 Manufacturing ... 32
5 Type test ... 40
6 Supervisory inspection ... 44
7 Gas cylinder accessories ... 59
8 Filling and use ... 66
9 Regular inspection ... 78
10 Supplementary provisions ... 83
Appendix A Classification, type, code of gas cylinders ... 84
Appendix B Classification of cylindered gases and physical parameters of common gas ... 87
Appendix C ... 94
Comparison of basic safety requirements between gas cylinder enterprise standards and this Regulation ... 94
Appendix D Sign of gas cylinders ... 98
Appendix E Imported and exported gas cylinders ... 108
Appendix F ... 113
Application form for appraisal of gas cylinder design documents... 113
Appendix G ... 114
Appraisal report for gas cylinder's design documents... 114
Appendix H ... 115
Datasheet of gas cylinder product ... 115
Appendix J Application for type test of special equipment (gas cylinder) ... 116 Appendix K Sampling and management requirements of type test samples for gas cylinders and gas cylinder valves ... 118
Appendix L Type test items for gas cylinders and gas cylinder valves ... 121 Appendix M Type test report of special equipment (gas cylinders, gas cylinder valves) ... 125
Appendix N Type test certificate for special equipment (gas cylinders, gas cylinder valves) ... 132
Annex n Numbering method and descriptions for type test certificate of gas cylinder (gas cylinder valve) ... 133
Appendix P Liaison list for supervisory inspection of special equipment ... 135 Appendix Q Notice on supervisory inspection opinions of special equipment ... 136 Appendix R Supervisory inspection certificate for (manufacturing) special equipment (gas cylinder) ... 137
Appendix S Supervisory inspection certificate of safety performance of imported special equipment (gas cylinder) ... 139
Appendix T Pattern of protective shell of gas cylinder ... 140
Appendix U ... 141
Regular inspection items for gas cylinders ... 141
Appendix V Regular inspection report of gas cylinder ... 142
Attached Table va List of qualified gas cylinders for regular inspection ... 143 Attached Table vb List of scrapped gas cylinders ... 144
Previous formulations (revisions) of relevant rules and regulations ... 145 Regulation on safety technology for gas cylinder
1 General
1.1 Purpose
In order to regulate the safety work of gas cylinders, protect the safety of people's lives and properties, promote economic and social development, this Regulation is formulated, in accordance with the "Special Equipment Safety Law of the People's Republic of China" and the "Regulations on Safety Supervision of Special Equipment". 1.2 Scope of application
(1) This Regulation is applicable to the seamless gas cylinders, welded gas cylinders, low temperature thermally insulated gas cylinders, wrapped fiber reinforced cylinder, gas cylinders with fillers, bundles of gas cylinders (Note 1-3), which have an ambient temperature of -40 ??C ~ -60 ??C (Note 1-1), a nominal volume of 0.4 L ~ 3000 L, a nominal working pressure of 0.2 MPa ~ 70 MPa (gauge pressure, the same below), the product of pressure multiplied by volume of greater than or equal to 1.0 MPa ?? L; contains compressed gas, high (low) pressure liquefied gas, low temperature liquefied gas, dissolved gas, adsorbed gas, mixed gas (Note 1-2), the liquid which has a standard boiling point equal to or lower than 60 ??C;
(2) For the large-capacity gas cylinders for long-tube trailers and tube-bundle containers, as well as the gas cylinders for firefighting, they shall meet the relevant provisions of the general rules, materials, design, manufacture of this Regulation. For the long-tube trailers and tube-bundle containers, they shall also meet the requirements of the "Regulations on the Safety Technical Supervision of Mobile Pressure Vessel". For the large-volume gas cylinders, which are greater than 3000 L and less than or equal to 5000 L, it may refer to the relevant provisions of this Regulation.
The gas cylinders, which are referred to in this Regulation, include the cylinder body and gas cylinder accessories. The classifications, varieties, codes of main gas cylinders covered are as shown in Appendix A.
Note 1-1: The applicable ambient temperature of vehicle gas cylinders (Note 1-4) and fire extinguishing gas cylinders shall meet the requirements of relevant standards Note 1-2: For the classifications of the cylindered gas, such as compressed gas, high (low) pressure liquefied gas, low temperature liquefied gas, dissolved gas, adsorbed gas, mixed gas, etc., as well as the physical properties of commonly used gases, refer to Appendix B.
Note 1-3: Gas cylinder bundle device refers to a cylinder-group type container device, that bundles several gas cylinders together, for road transportation or temporary fixed use, which generally consists of gas cylinders, pipelines, frames.
Note 1-4: Vehicle gas cylinders refer to the gas cylinders, which are fixed on the motor vehicles, to hold automobile fuels (such as natural gas, hydrogen, liquefied petroleum gas, liquid dimethyl ether, etc.).
1.3 Scope of nonapplication
This Regulation does not apply to the fire-fighting gas cylinders that only withstand instantaneous pressure during fire-fighting, the portable dry powder fire-extinguishing gas cylinders, the water-based fire-extinguishing gas cylinders, the solder-structured gas cylinders, as well as the gas cylinders used for the equipment which is dedicated for the military equipment, the nuclear facilities, the aviation spacecraft, the railway locomotives, the marine facilities and ships, the open pit and underground mines, mines are used by underground, civil airport.
1.4 Relationship with standards and management systems
(1) This Regulation specifies the basic safety requirements, for the design, manufacture, type test, supervisory inspection, filling and use, regular inspection of gas cylinders. The relevant standards for gas cylinders AND the safety management requirements for gas cylinders of relevant organizations shall not be lower than the provisions of this Regulation;
(2) Gas cylinder products shall generally be designed and manufactured, according to national or industrial standards. If national or industrial standards have not yet been formulated, group standards or corporate standards shall be formulated. The developer of corporate standards shall also provide a comparison table, that complies with the basic safety requirements of this Regulation. See Appendix C for the format.
1.5 Handling of special cases
If the relevant organizations adopt new materials, new technologies, new processes, which are inconsistent with the requirements of this Regulation; OR, if it is not required by this Regulation AND may have a significant impact on safety performance, they shall report to the State Administration for Market Regulation. The State Administration for Market Regulation shall carry out the technical review and approval, in accordance with the review and approval procedures on the new materials, new technologies, new processes.
1.6 Coordinated standards and reference standards (Note 1-5)
(1) The gas cylinder's manufacturing sign is the basis for identifying gas cylinders; the content of the sign shall comply with the provisions of Appendix D of this Regulation, as well as relevant standards. The content of the manufacturing sign of small volume gas cylinders may refer to the provisions of Appendix D of this Regulation;
(2) The manufacturer shall make a stamped sign, a label sign or a printed sign, as well as other manufacturing signs, on each gas cylinder;
(3) The manufacturer shall stamp the concave signs, on the head of steel gas cylinder (Note 1-7), which indicate the contained medium, the year of manufacture, the organization with property rights; stamp the words "Prohibited in densely populated indoors?€? on the cover. For the gas cylinders of composite materials, it shall pressure-cast the signs, which indicate the contained medium, the year of manufacture, the organization with property rights, as well as the words "Prohibited in densely populated indoors?€? on the jacket.
Note 1-7: Gas cylinders refer to the gas cylinders, which contain liquefied petroleum gas, liquefied dimethyl ether and other civil fuel gas. They are divided into steel gas cylinders and composite gas cylinders.
1.8.1.2 Electronic recognition signs
Manufacturers of hydrogen gas cylinders, fully-wrapped carbon fiber reinforced cylinders, fuel gas cylinders, gas cylinders for vehicles shall set traceable permanent electronic recognition signs, on the gas cylinders that leave the factory. Other gas cylinder manufacturers are encouraged to set traceable and permanent electronic recognition signs, on the gas cylinders that leave the factory.
The electronic recognition sign, which is set on the steel gas cylinder, shall be directly engraved or welded on the shield; it shall be ensured that it cannot be replaced and can be effectively read, within the service life of the cylinder. The electronic recognition sign shall be able to be linked to the gas cylinder product publicity platform, which is established by the manufacturer, through mobile phone scanning, so that the product information data of each gas cylinder can be directly obtained.
1.8.1.3 Color sign, words, color ring on the outer surface of the gas cylinder The color signs, words, color rings on the outer surface of gas cylinders shall meet the requirements of GB/T 7144 "Colored cylinder mark for gases". If there are special requirements for color signs, words and color rings, they shall also meet the requirements of relevant product standards. For the color signs, words and color rings of gas cylinders, that are not included in the national standards, group standards shall be formulated. On the conspicuous part of the gas cylinder, it shall be marked with the name or abbreviation of the gas cylinder filling organization, that has registered for use. 1.8.1.4 Color signs dedicated for gas cylinders
(1) The registration authority for the use of gas cylinder may, in the city (county) area, stipulate that the gas cylinders, which are filled in this area, shall be use a uniform dedicated color;
(2) For the gas cylinder filling organization, that has more than a certain number of gas cylinders under its own property rights, may apply a color sign, which is dedicated to the filling organization, on the gas cylinders that have undergone the use registration, with the consent of the registration authority for the use of gas cylinder.
1.8.1.5 Signs of low temperature thermal insulation gas cylinders (including liquefied natural gas cylinders for vehicles)
For the gas cylinders, which contain liquid oxygen (O2), nitrous oxide (N2O), liquefied natural gas (LNG) and other media, they shall be press-made with the obvious protruding symbols of the filled medium, such as "O2", "N2O", "LNG", in the prominent part of the head on the jacket.
1.8.2 Regular inspection sign of gas cylinder
The marking method of the regular inspection sign of gas cylinders shall comply with the provisions of Appendix D of this Regulation. The regular inspection agency for gas cylinders shall make a permanent inspection sign, on each gas cylinder, that has passed the inspection; apply the name of the inspection agency and the date of the next inspection (for the gas cylinders, that cannot be applied, it can be replaced by the inspection sign ring); enter the inspection information in the database, which is corresponding to the electronic recognition sign.
1.9 Import and export of gas cylinders
In addition to complying with the relevant provisions on the inspection of import and export commodity, import and export of gas cylinders shall also comply with the regulations in Appendix E of this Regulation.
1.10 Administrative requirements
Gas cylinder's manufacturers, filling organizations, inspection and testing institutions, etc., shall strictly implement this Regulation; record the process information of the design, manufacture, filling, inspection of gas cylinder products; establish a gas cylinder quality and safety traceability system; enter the required information into the gas cylinder quality and safety traceability information platform, in a timely manner, in accordance with the provisions of information management of special equipment. (2) The material of the steel seamless gas cylinder shall be high-quality carbon- manganese steel and chromium-molybdenum steel, which has a carbon content of not more than 0.38%, wherein the sulfur and phosphorus content is not more than 0.010% and 0.015% respectively, the total content of sulfur and phosphorus is not more than 0.020%;
(3) Steel plates for welded steel gas cylinders shall have good rolling and welding properties, the carbon content shall not exceed 0.20%, the carbon equivalent shall not exceed 0.50%; the content of sulfur and phosphorus shall not exceed 0.020% and 0.025%, respectively %; the material for non-refillable welded steel cylinders shall use the carbon steel, which has a carbon content not greater than 0.12%;
(4) The material for the manufacture of stainless steel gas cylinders shall be austenitic stainless steel or austenitic-ferritic duplex stainless steel, which has good resistance to intergranular corrosion and stress corrosion;
(5) For the materials, which are used for the aluminum alloy gas cylinder body and the aluminum alloy liner, they shall have good intergranular corrosion resistance and stress corrosion resistance. The content of lead and bismuth, in the aluminum alloy material, shall not be greater than 0.003%. The single-item content of other impurity elements shall not be greater than 0.05%; the total content shall not be greater than 0.15%;
(6) For the materials, which are used for steel gas cylinders containing medium with a tendency to stress corrosion, it shall control the actual tensile strength of the materials not to exceed 880 MPa;
(7) For the materials, which are used for the steel gas cylinders containing hydrogen or other brittle media, the actual tensile strength shall be controlled not to exceed 880 MPa; when the actual yield strength ratio (the ratio of yield strength/tensile strength, the same as above) is not greater than 0.90, the actual tensile strength, which is allowed for the material, is not more than 950 MPa;
(8) For the materials, which are used for the cylinder body of the steel gas cylinder containing compressed natural gas AND the steel liner of the wrapped fiber reinforced cylinders, if the content of sulfur and phosphorus is not more than 0.005% and 0.010%, respectively, meanwhile it meets the requirements for the stress corrosion test of hydrogen sulfide, in the corresponding standard (stress ring method, the same below), THEN, it is allowed for the actual tensile strength of the material to be greater than 880 MPa, but not greater than 1000 MPa. The test results of the hydrogen sulfide stress corrosion test shall be indicated in the cylinder design document and type test report. When changing the material designation, manufacturer, smelting method or thermal processing method, the gas cylinder manufacturer shall conduct the hydrogen sulfide stress corrosion test again;
(9) For large-volume seamless steel gas cylinders for long-tube trailers and tube- bundle containers, which contain hydrogen, natural gas or methane and other media, the actual tensile strength of the materials used, after heat treatment, shall be less than or equal to 880 MPa; the yield strength ratio shall be less than or equal to 0.86; the elongation at break (A50mm) shall be greater than or equal to 20% (the tensile test specimen shall be a flat specimen with a full wall thickness, the same below). For large-volume seamless steel gas cylinders, which contain other gases, the actual tensile strength of the material, after heat treatment, shall be less than or equal to 1060 MPa; the yield strength ratio shall be less than or equal to 0.92; the elongation at break (A50mm) shall be greater than or equal to 16%.
2.3 Use of materials of overseas designations
(1) Materials of foreign designations shall be those, which are permitted to be used in overseas pressure vessel or gas cylinder regulations and relevant product standards; had been used under similar working conditions overseas. Their chemical composition and mechanical properties shall comply with the
provisions of this Regulation and relevant coordinated standards;
(2) The material quality certificate shall comply with the provisions of 2.1 of this Regulation;
(3) Before a gas cylinder manufacturer uses materials of foreign designations, to manufacture gas cylinders for the first time, it shall conduct process tests, according to the requirements of relevant product manufacturing process, such as cold and hot processing process tests, welding and heat treatment process qualification, etc.; formulate corresponding process documents.
2.4 Special requirements for material selection
(1) Aluminum alloy materials shall not be used, for gas cylinders which contain chlorine, hydrogen bromide, carbonyl dichloride, hydrogen fluoride, methyl chloride, methyl bromide, etc., which are prone to intergranular corrosion or stress corrosion of aluminum alloys;
(2) For gas cylinders, which contain carbon monoxide medium, aluminum alloy or stainless steel material shall be preferred; if carbon steel material is used, the content of water and carbon dioxide in the gas shall be controlled;
(3) For gas cylinders, which contain gas for medical and food use, aluminum alloy or stainless steel materials shall be preferred; otherwise, the inner surface of the gas cylinder shall be cleaned;
(4) If the inner liner of the wrapped fiber reinforced cylinders, which contain combustible gas, is made of non-metallic materials, the technical review shall (3) The opening is on the centerline of the convex end.
3.8.3 Cylinder structure of welded gas cylinders and low temperature insulated gas cylinders
The cylinder's structure type and size shall meet the following requirements: (1) There shall be no more than one longitudinal weld on the welded gas cylinder body and the liner of the low-temperature insulated gas cylinder; there is no more than 2 circumferential welds;
(2) The longitudinal weld joint of the cylinder body adopts the type of butt welded joint; no permanent backing plate is allowed. The circumferential weld joint can be a butt welded joint, a butt welded joint with a permanent backing plate, or a bottom-locked welded joints, etc. For the circumferential weld, which connects the convex pressure bearing head and the cylinder, the lap welding joint type is allowed;
(3) For welded gas cylinders for vehicles, low-temperature insulated gas cylinders, gas cylinders containing corrosive and toxic medium, whose hazard level is extremely hazardous or highly hazardous, the valve seat and the welded joint of the nozzle shall be fully penetration weld;
(4) The opening of the welded gas cylinder (except for the gas cylinder for vehicles) shall be on the head; the distance between the outer edge of the opening and the outer circumference of the head shall be greater than 10% of...

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