How is the sampling valve represented in PID for everyone?
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That’s how I expressed it; I’m not sure how everyone else expresses it
Add ‘s’ to the valve; it depends on whether the client has any requirements or as indicated in the drawings
Clause 3.3.3 of HG/T20519-2009 specifies the clear expression method
Short section with a needle-shaped valve; a circle behind it, and inside the circle are the letters AP (sampling point) + a number (such as 1001)