Do containers with a capacity of less than 1 liter that are under pressure fall under the category of pressure vessels?
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Dear teachers, 0.95-liter welding gas cylinders (small tanks) that are exported abroad and used to contain gases under liquefied pressure (for use in the food industry), with an internal pressure of around 5 MPa – do they fall under the category of pressure vessels that are subject to regulatory controls?
A pressure vessel refers to a sealed device used to hold gases or liquids and capable of withstanding a certain pressure; its scope is defined as those with a maximum operating pressure of 0.1 MPa (gauge pressure) or higher； 2. Gases, liquefied gases, and liquids with a maximum operating temperature equal to or higher than their standard boiling point ； 3. Fixed and mobile containers with a volume of 30 L or more and an inner diameter (for non-circular cross-sections, this refers to the largest geometric dimension of the internal boundaries) of 150 mm or more. All 3 requirements for pressure vessels must be met in order to be considered compliant. A volume of 0.95 L does not meet the requirements for classification as a pressure vessel.
According to the Catalogue of Special Equipment, gas cylinders, liquefied gas cylinders, and cylinders containing liquids with a standard boiling point of 0°C or lower, whose nominal working pressure is greater than or equal to 0.2 MPa (gauge pressure) and whose product of pressure and volume is greater than or equal to 1.0 MPa•L, are classified as pressure vessels； (I personally think it also depends on which ** the goods are exported to, as well as the standard requirements set by that **.)
0.95 liters, can format – not considered a pressure vessel
Refer to the sampling cylinder of the closed sampler; it does not belong to pressure vessels
This post was last edited by zhx7540 on 2021-4-1 at 16:20. In accordance with the \"Law of the People’s Republic of China on the Safety of Special Equipment\" and the \"Regulations on the Supervision of the Safety of Special Equipment\", the General Administration for Quality Supervision, Inspection and Quarantine has revised the \"Catalogue of Special Equipment\"; with the approval of the State Council, it is now promulgated and put into effect. At the same time, the \"Notice on Publication\" (Guo Jian Zhi Guo [2004] No. 31) and the \"Notice on Adding Items to the Catalogue of Special Equipment\" (Guo Jian Zhi Te [2010] No. 22) are repealed. The “Catalogue of Special Equipment” is interpreted by the General Administration of Quality Supervision, Inspection and Quarantine. Its scope is defined as gases and liquefied gases with a maximum operating pressure of 0.1 MPa (gauge pressure) or more, liquids with a maximum operating temperature equal to or higher than their standard boiling point, as well as fixed and mobile containers with a volume of 30 L or more and an inner diameter (for non-circular cross-sections, this refers to the largest geometric dimension of the cross-sectional boundaries) of 150 mm or more ； Gas cylinders, liquefied gas cylinders, and cylinders for liquids with a standard boiling point of 60°C or lower, whose nominal working pressure at full charge is greater than or equal to 0.2 MPa (gauge pressure), and whose product of pressure and volume is greater than or equal to 1.0 MPa·L ； Oxygen chamber.
It falls under that category; the definition of a pressure vessel or gas cylinder is that the product of pressure and volume is greater than 1.
According to the **standards, it does not belong to pressure vessels but rather to gas cylinders; for specific details, refer to TSG R0006-2014