How to interpret this pipeline diagram on the PID?
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As shown in the figure below, in my understanding, the long sequence of numbers before 200 represents the pipe number; 200 indicates the pipe diameter of DN200, and GC2 denotes the pipe’s safety grade. What does S3A mean?
Correction: 80 refers to the pipe diameter DN80
S3A represents the pipe material: S denotes the domestic pipe pressure rating, 3 is the sequence number, and A stands for cast iron
There is a legend in front of each set of drawings, and the legend provides detailed explanations
I can’t interpret it, but the pipes in GC2 aren’t made of cast iron, right?
Each design institute has its own rules for numbering; it’s better to check the corresponding homepage image for accuracy
In my opinion, S3A refers to a pipe grade, where S denotes the pipe material, 3 indicates the pressure rating, and A is the serial number
Different projects are represented differently; it depends on the pipe-related documents of one’s own project. S3A indicates the pipe grade, S denotes the pipe material, 3 represents the pressure rating, and A is a serial number related to the flange surface and gaskets. S could be stainless steel or some other material, while the pressure rating needs to be checked in the project documents, as it varies depending on who prepared them
There is a legend at the beginning of each set of drawings, and the legend provides detailed explanations; with these explanations, the overall meaning can generally be understood