Questions about boiling point?
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I have a gentle question: the standard boiling point of water is 100°C. Is it the same whether it’s by the sea or at high altitudes? Regarding the classification of pressure vessels, does it not matter whether the operating temperature of the liquid is above the standard boiling point, regardless of whether it’s in a coastal area or at high altitude?
The standard boiling point of water is 100°C, and it varies in different locations such as by the sea or at high altitudes. The classification of pressure vessels is based on the operating temperature of the liquid being higher than the standard boiling point, regardless of whether it is in a coastal area or at a high altitude.
For a liquid medium, the standard boiling point is unique, regardless of whether the pressure vessel is used at a plateau or in a basin. This is merely one of the criteria used to determine whether a container falls under regulatory oversight. Even if the container is used at high altitudes, it is only subject to regulatory controls when the working pressure inside it is 0.1 MPa or higher; it is not affected by the lower boiling point resulting from the low air pressure at high altitudes.
Even in the same geographical location, the boiling point varies throughout the year due to the dynamic changes in atmospheric pressure. The standard boiling point is a standard value that is independent of geographical location.
This post was last edited by zjq1962 on 2017-11-29 at 12:52. The question raised by the original poster can be considered in more depth; the regulations on fixed-volume containers include liquids whose operating temperature is higher than or equal to their standard boiling point under regulatory oversight, and this is done out of a commitment to safety. Even if the substance inside the container remains in liquid form under normal operating conditions, in the event of an accident when the pressure equals atmospheric pressure, the liquid turns into gas, which can lead to significant hazards. For example, the boiling point of water is around 91 degrees at an altitude of 3000 meters; if the operating temperature is 95 degrees, the water released from such a container in the event of an accident will boil. Is this also considered to be quite harmful?
Well, how should I put it? For defining a range, there must surely be a boundary line. This line is not necessarily 100% accurate, but it is definitely based on sound principles. Just as the law defines those under 18 as minors, being one day short also means being a minor. But since people are born on the same day, there is a difference between morning and evening; it’s not possible to include details such as year, month, day, hour, minute, and second in the birth record. Therefore, it’s necessary to determine whether someone is 18 or not based on the day of birth. The tolerance specifications define the standard boiling point, just like the age of 18; it’s fixed that way. It doesn’t matter by how a few hours your birth time is off.
It is only at 1 ATM that the boiling point of water is 100 degrees. The altitude is less than 1ATM.
There should be no distinction between coastal areas and plateaus; otherwise, things will get chaotic.