I would like to ask: is there a difference between KPa and KPaG? How to convert

There shouldn’t be any difference, right? The one with G at the end refers to gauge pressure! Personal understanding

KPaG: gauge pressure; KPaA: absolute pressure. KPa generally refers to gauge pressure

1. Gauge pressure refers to the pressure in a pipeline, namely the pressure measured using instruments such as pressure gauges, vacuum gauges, or U-tubes; it is also known as relative pressure. Gauge pressure is measured with respect to atmospheric pressure, and its symbol is Pg. 2. The pressure that acts directly on the surface of a container or object is called “absolute pressure.” The value of absolute pressure is measured with absolute vacuum as the reference point, and it is denoted by PABS (with ABS as the subscript). Absolute pressure is essentially gauge pressure plus the local atmospheric pressure (usually 1 standard atmosphere, which equals 101.3 Kpa). When pressure is indicated with a “G” after it, it refers to gauge pressure; when “A” is used, it denotes absolute pressure. Gauge pressure, abbreviated as g, refers to the pressure reading shown on the pressure gauge in a system. It can also be simply understood as placing a pressure gauge at atmospheric pressure, at which point the gauge reads zero. The gauge pressure shows 0 at this time. If the gauge pressure increases, the amount by which it increases is the gauge pressure. Absolute pressure a=absolute is expressed as a value corresponding to absolute pressure. Simply put, it is atmospheric pressure plus gauge pressure. . s8 B3 D9 {# z' C" ]. I5 |- K+ k3 a* o Simply put, at atmospheric pressure, the gauge pressure is 0, while the absolute pressure is 1.013 bar. : s* _; ^+ J+ u: d' E; Q& e( Q Absolute pressure units: MPa, KPa, Pa, etc. 8 E" `* _$ s7 |" e: ] Gauge pressure units: MPa(G), KPa(G), Pa(G), etc. 5 Y- b! e( P# l$ G: R+ {$ | G=gauge

G is gauge pressure, A is absolute pressure; the difference between gauge pressure and absolute pressure is one atmosphere, or 0.1 MPa. Gauge pressure = Absolute pressure + 0.1 MPa

Reply 1# hyj_vivi_2009: The difference between KPa and KPaG is that KPaG specifically refers to gauge pressure, whereas KPa does not specify whether it is gauge pressure or absolute pressure. The pressure used in the strength calculation formula, when no a or g is specified, refers to gauge pressure. The pressure related to the properties of the medium, when no a or g is indicated, refers to absolute pressure. That’s generally the case, but it also depends on the context.