Is this tank a pressure vessel governed by the Capacity Regulations?

It is definitely a pressure vessel, and this tank is a pressure vessel governed by the "Content Regulations".

Can your friends upstairs please tell me the reasons for your judgment? Thanks! !

The pressure is 2.5MPa and the temperature is 80. Of course it is a pressure vessel:lol :lol

It should belong to the second category, because the liquid level in the tank does not exceed 80% all year round. Where does the pressure come from? It must be the air at the top, and the boiling point of air is very low. It can be seen that the air temperature at the top of the tank is higher than the boiling point of the air. And the gas phase space is 0.628M^3, which is greater than 0.025M^3. The pressure is medium pressure. According to the capacity planning, it is classified into the second category.

The Special Equipment Safety Supervision Regulations define pressure vessels as: Sealed equipment that contains gases or liquids and carries a certain pressure. Its scope is defined as fixed containers and mobile containers for gases, liquefied gases, and liquids with a maximum working temperature higher than or equal to the standard boiling point. The maximum working pressure is greater than or equal to 0.1MPa (gauge pressure), and the product of pressure and volume is greater than or equal to 2.5MPa·L. ； Cylinders containing gases, liquefied gases and liquids with a standard boiling point equal to or lower than 60°C whose nominal working pressure is greater than or equal to 0.2MPa (gauge pressure), and the product of pressure and volume is greater than or equal to 1.0MPa·L ； Oxygen chamber, etc. Since the operating temperature is 80°C, which is lower than 100°C, it is not a pressure vessel.

It is a pressure vessel governed by the "Capacity Regulations", because the gas phase space of the medium (non-instantaneous) is ≥0.025m3, and the working pressure is ≥0.1MPa. This post was last edited by asdfg104 on 2009-2-18 16:03 ]

Agree with 4th floor's opinion. The gas phase space at the top should be considered to be classified into Category II.

Where does the top pressure of 2.5MPA come from? It must be the air at the top! In this case, air should be the main factor.

Reasons: 1. According to Article 2, paragraph 1 (1) of the regulations, the maximum working pressure is greater than or equal to 0.1MPa. The pressure of the owner’s water tank is 2.5MPa, which is greater than 0.1MPa. 2. According to Article 2, paragraph 1 (2) of the regulations, the inner diameter of your water tank is greater than 0.15M, and the volume is greater than 0.025M3; 3. According to Article 2, Paragraph 1 (3) of the Capacity Regulations, the holding medium is a gas, a liquefied gas or a liquid with a maximum operating temperature equal to or higher than the standard boiling point, and the working temperature of your water tank is lower than the standard boiling point of water. Conclusion: Your water tank meets the first two items of Article 2, Paragraph 1, of the Capacity Regulations, but does not meet the last one, so the Capacity Regulations do not apply to this metal water tank. The conditions you have assumed are not reasonable at all.

If it is full of water or the top space is less than 0.025M^3, it can be treated as mentioned on the 7th floor.

But it can be designed according to GB150.

Note 3 of "Ronggui": When the main medium in the container is a liquid with the maximum working temperature lower than the standard boiling point, such as the gas phase space (non-instantaneous) is greater than or equal to 0.025 cubic meters, and the maximum working pressure is greater than or equal to 0.1mpa, it also falls within the scope of application of this regulation.

Article 2, Paragraph 1 of the Regulations "1. This regulation applies to pressure vessels that meet both the following conditions:"

It is a pressure vessel but is not subject to the Regulations. Article 2 of the "Content Regulations" has this sentence: "The containing medium is a gas, a liquefied gas or a liquid with a maximum operating temperature higher than or equal to the standard boiling point." The poster said that under the conditions mentioned, water is still a liquid

In the case I'm talking about, the core problem is not the water, but the 20% head space of the water tank. Note 3 of "Ronggui": When the main medium in the container is a liquid with the maximum working temperature lower than the standard boiling point, such as the gas phase space (non-instantaneous) is greater than or equal to 0.025 cubic meters, and the maximum working pressure is greater than or equal to 0.1mpa, it also falls within the scope of application of this regulation. This post was last edited by qlmzldx on 2009-2-18 16:12 ]

The poster said that the gas space in the tank is larger than 0.025 cubic meters and the pressure is 2.5MPa, so it is governed by the volume regulations.

Note 2 of Article 2 of Xiangjian Ronggui has a rule about 0.025 cubic meters, which is easily overlooked.

Note 3 of Article 3 of the Capacity Regulations, the gas phase space is greater than or equal to 0.025 cubic feet, which shall belong to

Of course it's a pressure vessel. But it is not governed by regulations. Say nothing.

Where did your pressure of 2.5MPa come from? And it can still maintain 80°?