I have a question regarding single-tube diagrams
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The diagram shows a simple single-pipe diagram; the endpoints of such a diagram generally need to have their planar coordinates indicated, as well as orientation values such as E/S/W/N, and also the elevation EL, right? Now there is a problem: with E and W, and S and N, there needs to be a coordinate origin to define which point serves as the reference for east, west, south, and north. Where exactly should this origin be marked in that diagram? On the pipe layout plan? Still a single-tube diagram? Could any expert provide an example? Thank you so much.
The red area in the above image is what I have marked; it is not part of the drawing content
Moreover, both the Cartesian coordinates and those used for EL are relative coordinates. The main question is: with respect to plane relative coordinates, which specific point are they relative to, and how is that point represented?
Our original process was indicated on axonometric drawings, that is, on single-line diagrams
The problem is, for example, if there are 100 single-tube diagrams, do all 100 of them need to be labeled? Moreover, the single-tube diagram itself is not to scale; so how exactly can one refer to it when carrying out construction based on that diagram?
Have seen those marked on the device layout plan
A project comes with a general layout plan, on which all elements are assigned coordinates; the coordinates on your axonometric diagram should match those. This is exactly the method we use now!
When the axonometric view is not clear, refer to the floor plan.