The problem with system flowcharts is quite annoying
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What is the general required size for valve symbols when printing system flowcharts? For example, for globe valves or gate valves, what are the appropriate lengths and widths, and are there any specific requirements? Personally, I think that for clarity on the drawings, the length should be 6–10 millimeters and the width 3–5 millimeters. I’m not sure if there are any specific regulations regarding this – namely, what the minimum and maximum values should be. It’s impossible to draw a stop valve symbol with a length of 20 millimeters, nor can it be only 2 millimeters long ；
Is there no legend? Just pull it over and use it.
The legend size is also determined by humans. I mean, isn’t there any **standard or industry standard for the size of legends in China?**
Valves in the design drawings should still be drawn to scale as much as possible.
Look at the title upstairs; it’s a system diagram, not a schematic diagram
According to HG20519, under normal circumstances, you just need to take a PID and make slight modifications! !
There is no need to follow the caliber ratio. In the overall diagram, aesthetics and size should not hinder reading; it’s not a single-line diagram after all.
The standards for chemical engineering drawing require a format of 3*6 or 2*4, with font sizes of 3.5 and 2.5 respectively. We usually use this one; buhuu can be unclear. PS: Urban gas engineering
What was said on the 8th floor makes sense! ! ! ! ! ! !