What is the concept of liquefied gas?
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In the pressure regulations, liquefied gases are classified as Group 1 media, but what constitutes a liquefied gas is not defined. I was wondering if there is any standard that provides a clear definition of liquefied gases? I checked online and found that liquefied gases are defined as gases whose saturated vapor pressure at the highest operating temperature is not less than 0.1 MPa, and whose critical temperature is greater than or equal to –10°C; they represent a category that includes both high-pressure and low-pressure liquefied gases. ), but there is no explicit source.
For details, see TSG R0006 \"Regulations on the Safety Supervision of Gas Cylinders\"
GB/T13005-2011 Terms for Gas Cylinders contains the explanation
GB/T13005-2011 Terms for Gas Cylinders contains the explanation
GB/T13005-2011 Terms for Gas Cylinders contains the explanation
Liquefied gases are divided into high-pressure liquefied gases (gases with a critical temperature of -10 to 70 degrees, which are in liquid form at the time of filling) and low-pressure liquefied gases (gases with a critical temperature above 70 degrees; in the tank during filling, storage, and transportation, a mixture of gas and liquid exists, with the liquid form being predominant). High-pressure liquefied gases are divided into three groups: A, B, and C, while low-pressure liquefied gases are divided into four groups: A, B, C, and D
It is described in detail in GBT13005-2011 Terms for Gas Cylinders
It is described in detail in GBT13005-2011 Terms for Gas Cylinders
It is described in detail in GBT13005-2011 Terms for Gas Cylinders