What do these two icons on the P&ID represent?
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First, I wish everyone a happy Labor Day. . What is the red area in the first image below? Looking at the legend, the first one is a ball valve, but the title of this legend is \"Piping Legend\" – isn’t that incorrect? And what does the second set of three slashes represent, which isn’t found in the legend?
PID includes all chemical processing equipment such as pipelines, reactors, storage tanks, pumps, heat exchangers, etc., as well as various valves
Signal cable of the flowmeter transmitter
Draw three diagonal lines online to represent the electrical signal wires
Three diagonal lines drawn online indicate non-standard electrical signal wires.
The first one is the ball valve. The second indication is the signal line
1 is the process shut-off valve, which prevents damage to the pressure gauge and cannot be replaced while the system is in operation. 2. For the cable between the electromagnetic flowmeter gauge and the transmitter,