Is it a pressure vessel?
Thread Content
Our company has commissioned a pressure vessel manufacturing factory to produce a cooling water buffer tank. The design pressure is 1.2 Mpa, the operating pressure is 0.8 Mpa; the diameter is 1 meter and the height is 2 meters. The design drawings classify this vessel as a Class 1 pressure vessel, but the manufacturing factory states that the design institute has misclassified it. Who is right and who is wrong? Please advise!
Check the operating temperature and design temperature. If the medium is liquid, then it’s not; if it’s gaseous, then it is!
It is a pressure vessel, but it must under no circumstances be classified as a category III vessel
Operating temperature: 90 degrees. Design temperature: 120 degrees. Thank you!
Also, has the new capacity regulation been implemented?
I think the design institute is right. Although the medium is water, if the gas phase volume is greater than 0.025 cubic units, classification is still required. .
It should be considered a pressure vessel: lol
Agree with the 6th floor!!!:victory:
It’s obvious that a trick was used here – the design temperature was deliberately set at 120°C so that it would be classified as a type of pressure vessel; if the design pressure is 0.8 Mpa and the temperature is below around 97-98 degrees, then it is considered a non-pressure vessel. Haha~
It falls under the pressure vessel category.:)
It is a type of pressure vessel; the design institute is correct, and you can also check according to Article 6 of the Pressure Vessel Regulations.
Agree with what was said on floor 6. It should be noted: just how large is the gas space in this water tank? That is, what is the average water level in this tank over the years? ?
What the design institute deals with are pressure vessels.
According to the original poster, it’s not easy to determine; it depends on your water level and the remaining space. If it’s >0.025 m3, then it falls into that category, but if not, it doesn’t.
Firstly, the operating temperature is 90 degrees, while the design temperature is set at 120 degrees, which seems to be intended to raise the grade of the pressure vessel. Secondly, it is also necessary to consider the filling factor of the container, to check whether the gas space is greater than 25 L; if it is greater than 25 L, then it is considered a Class 1 pressure vessel.
With a design temperature of 120 degrees, which is above the boiling point of water, it should be a pressure vessel. The new capacity regulations have not yet been implemented.
According to the regulatory requirements, if the gas space within that buffer tank is 0.025 cubic meters or more, then the classification assigned by the design institute is correct; if the gas space is less than 0.025 cubic meters, then such a buffer tank does not require any classification.
Undoubtedly, if the gas space volume is greater than 0.025 cubic units, it is definitely classified as Category 1. However, if the gas space volume is less than 0.025 cubic units, it falls outside this category. In any case, all of these are pressure vessels and should comply with GB150. For some reason, many people equate pressure vessels with compliance requirements, which is a serious mistake. The correct relationship should be as follows: something is a pressure vessel but may not be subject to certain regulations; those that are subject to the 1999 version of the standards are definitely pressure vessels. Yet they don’t all have to comply with GB150, as there are other standards as well, such as those for pressure vessels made of non-ferrous metals and cast pressure vessels.
I believe that design institutes should classify facilities based on a gas phase volume of 0.025 cubic meters or more; if the gas phase volume is less than 0.025 cubic meters, then according to Article 2(3) of the safety regulations, since the maximum operating temperature of the medium is below its standard boiling point, such facilities cannot be classified.
If the gas space is 0.025 cubic units or more, it is classified as Category 1 according to Article 2 of the regulations; if the gas space is less than 0.025 cubic units, and according to Article 2(3) of the regulations the maximum operating temperature of the medium is below its standard boiling point, then it cannot be classified into any category.