Some questions about chemical process diagrams
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What symbols should be used in CAD to draw flowcharts for thermometers, pressure gauges, flow meters, etc.? How are steam and cooling water represented?
Within the circle of 8–10 mm, temperature is indicated locally; a horizontal line within the circle indicates TI for centralized indication, PI for concentrated pressure indication, PG for local pressure indication, and FI for concentrated flow indication； If more is needed, a flowchart will make it all clear.
Go and take a look at the homepage of a P&ID; it has everything there
I’ve learned it:, :lol :lol :lol
Buy a book on chemical engineering CAD; it’s very detailed.
Just look at some design specifications and you’ll understand; they’re all simple rules
First, you need to look at the homepage image; make sure you can see all the symbols representing instruments, electrical components, and media on that image before proceeding with the design. The symbol regulations for the homepage image can refer to the **specifications**.
Just take a look at the cover image or refer to the standard HG 20519-92. Your question is way too easy – don’t you have anyone around to talk to? If you’re majoring in chemical engineering, you should know this by now, right?