Definition of pressure vessels

GB/T26929 \"Terms for Pressure Vessels\": A sealed container that holds fluid media under pressure. However, the definition here is broad and differs somewhat from that in tolerance specifications.

The definition of \"safety regulations\" is based on Article 99 of the Regulations: A pressure vessel refers to a closed device used for holding gases or liquids and capable of withstanding certain pressures. It includes fixed and mobile containers in which the maximum operating pressure is greater than or equal to 0.1 MPa (gauge pressure), and the product of pressure and volume is greater than or equal to 2.5 MPa·L, for gases, liquefied gases, and liquids whose maximum operating temperature is greater than or equal to their standard boiling point； 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 chambers, etc.

It is now based on the «Catalogue of Special Equipment»

Pressure vessels refer to closed devices used for holding gases or liquids and subjected to certain pressures. They are defined as fixed or mobile containers with a maximum working pressure of 0.1 MPa (gauge pressure) or more for gases and liquefied gases, and with a maximum working temperature equal to or higher than their standard boiling point; such containers also have a volume of 30 L or more and an inner diameter of 150 mm or more (for non-circular cross-sections, this refers to the largest geometric dimension of the cross-sectional boundaries)； 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.

The requirement of 2.5 MPa·L is not the latest.

Thank you. What is the full name of the “Regulations” you mentioned?

The last edit to this post was made by li*nji on 2019-1-18 at 10:14. Article 99 of the Regulations on the Safety Supervision of Special Equipment: The terms used in these regulations mean as follows: (1) A boiler refers to a device that uses various fuels, electricity, or other forms of energy to heat the liquid contained within it to certain parameters, thereby releasing thermal energy; such devices are defined as pressure steam boilers with a volume of 30 liters or more； Pressurized hot water boilers with an outlet water pressure of 0.1 MPa (gauge pressure) or higher, and a rated power of 0.1 MW or higher ； Organic heat carrier boiler. (II) Pressure vessels refer to enclosed devices used for holding gases or liquids and subjected to certain pressures. They include both fixed and mobile containers in which the maximum operating pressure is 0.1 MPa (gauge pressure) or higher, and the product of pressure and volume is 2.5 MPa·L or higher, for gases, liquefied gases, and liquids whose maximum operating temperature is equal to or higher than their standard boiling point ； 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 chambers, etc. (III) Pressure pipelines refer to tubular devices that use a certain pressure to transport gases or liquids. They are defined as pipelines for gas, liquefied gas, steam, or liquid media that are flammable, explosive, toxic, corrosive, and have a maximum operating temperature equal to or higher than their standard boiling point, with a maximum operating pressure of 0.1 MPa (gauge pressure), and a nominal diameter of more than 25 mm. (IV) Elevators refer to mechanical and electrical devices that are powered and use a cabin moving along rigid guides or steps moving along fixed paths to lift or transport people and goods horizontally; these include passenger (cargo) elevators, escalators, and moving walkways. (5) Lift machinery refers to mechanical and electrical equipment used for the vertical lifting or vertical lifting combined with horizontal movement of heavy objects; it is defined as elevators with a rated lifting capacity of 0.5 tons or more ； Cranes with a rated lifting capacity of 1 ton or more, and a lifting height of 2 meters or more, as well as electric hoists with fixed load-bearing configurations, etc. (6) Passenger cableways refer to mechanical and electrical devices that are powered and use flexible ropes to pull carriers such as cabins in order to transport people, including aerial passenger cableways, cable cars for passenger transport, and towed passenger cableways. (7) Large-scale amusement facilities refer to those used for commercial purposes to carry passengers for entertainment; such facilities are defined as those with a designed maximum operating linear speed of 2 m/s or more, or an operating height above the ground of 2 m or more. (8) Special-purpose motor vehicles used on site refer to those that are used exclusively in specific areas such as factory premises, tourist attractions, and amusement parks, other than for road traffic or agricultural use. Special equipment includes the materials used in it, the attached safety accessories, the safety protection devices, and the facilities related to those safety protection devices.

Let me correct that for you: the containers specified in Version 16 of the regulations are not those that require supervision and inspection; rather, they are containers that fall under the category of special equipment. Containers that require supervision and inspection must meet the relevant requirements of Chapters 4 and 6 of the 16th edition of the container regulations.