Regarding the issue of pipeline intersections being interrupted in P&ID drawing
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As the title suggests, what are the rules regarding interruptions when pipelines intersect? Both vertical and horizontal lines can cause interruptions.
There aren’t any clear rules; for our PID diagrams, it’s okay to use either horizontal or vertical lines – the important thing is that the diagram looks good. This requires experience in drawing over time, so that the diagram appears aesthetically pleasing.
It’s possible to interrupt in any case, but it’s important to make it clear
There are rules regarding this: when the main material line and the secondary material lines intersect, the main material line is not interrupted; when the incoming material line and the outgoing material line intersect, the incoming material line is not interrupted; when the common power supply line intersects with the process material line, the process material line is not interrupted; and when the circulation material line intersects with the incoming or outgoing material line, the circulation flow is interrupted. In other words, it’s necessary to distinguish between primary and secondary elements. That’s fine
I think it has to do with the order of drawing; generally, the main pipelines are drawn first, and then the utility lines and other process pipelines. In this way, the outlines of the main process pipelines and major equipment are generally not interrupted, while other process pipelines and utility lines can be interrupted. Additionally, the positions should be designed reasonably to minimize intersections.
Where can these regulations be found in the relevant regulatory documents? Thank you!
Are there any precision chemical engineering drawings that I can use as a reference? When there are many sets of such drawings, the piping layout always looks unsightly.
I think what was said on the 4th floor makes sense. I only remember to break the thin thread and keep the thick one.
I always interrupt the vertical line. Horizontal ones do not interfere, making it easier to make adjustments when editing the PID.
When using software to draw PID curves, there is such a pattern: the line drawn later is interrupted by the line drawn earlier by 5 mm, which is related to the order of drawing.
I don’t remember that either; everyone does it this way. You should look at a P&ID diagram.