Pressure issues in chemical production
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Let me ask you a relatively basic question, what is the pressure in general chemical production? Absolute pressure or gauge pressure?
The pressure on the pump pipeline is generally the gauge pressure, and if it is a vacuum pressure vessel, it generally refers to the degree of vacuum.
It is often said that the pressure of the device refers to the operating pressure. If there is no special indication, the pressure refers to the gauge pressure.
Gauge pressure, engineering pressure is also slightly different from physical pressure. .
Gauge pressure. There is no specific reference, it is generally gauge pressure.
Conditions not otherwise specified refer to gauge pressure, other conditions will be specified.
The pressure referred to in production is the index pressure. If it refers to absolute pressure, it will be specially marked.
Gauge pressure, unless otherwise stated.
Generally, gauge pressure is used, but foreigners’ craft packages sometimes use absolute pressure.
This is not certain, and some positions have different teaching methods. As far as DCS is concerned, what is not marked (A) is gauge pressure, and vice versa is absolute pressure, such as the inlet pressure of ammonia compressor and ammonia refrigeration compressor. In spoken language, we also say "kg", that is, 1MPA = 10 kilograms. It depends on the range of the pressure gauge and the minimum engineering pressure on site.
This post was last edited by zzuwangshilei on 2009-7-23 21:07 Generally refers to gauge pressure, I actually* All the pressures it has been exposed to are gauge pressures. Absolute pressure is commonly used in chemical engineering calculations.
Unless otherwise specified, it is gauge pressure.
In chemical production, pressure generally refers to gauge pressure, while vacuum environment generally refers to negative pressure, that is, vacuum degree.
The data read in chemical production is generally gauge pressure, and what is commonly referred to in daily life is gauge pressure. Absolute pressure is often used when performing data calculations.
19# Dancing Wind Absolute pressure is not only used in calculations. Absolute pressure meters are now economically used in vacuum systems, and what is detected is the absolute pressure.
Generally, it is gauge pressure. If it is absolute pressure, it will be marked.
factory* Conventional gauge pressure, the pressure value of the pressure gauge is relatively intuitive! However, the design unit generally still needs to clarify whether it is -g or -a.