Confusions in reading pipeline diagrams
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The original poster is currently looking at a piping layout diagram for a cooling tower, and is confused regarding the way the pipes are represented in the diagram; they hope to get some answers from everyone. Question 1: What do these two diameters of the pipe represent (the pipe has insulation)? (See Figure 1) Question 2: The pipe bends downward – why is it drawn in this way? What do the four circles represent respectively? (See Figure 2) Question 3: Why does there be a tendency to \"contract\" inward at the bends in the pipe? (See Figure 3) I hope you will kindly offer your advice. If there is any material that can help with learning to read diagrams, please let me know as well. Thank you.
I saw the Gossip diagram; was it drawn incorrectly?
The result obtained using 3D software, I guess
Guess: Question 1: What do these two diameters of the pipe represent (the pipe has an insulation layer)? (See Figure 1) Double-layer pipe: Question 2 – The pipe bends downward; why is it drawn in this way? What do the four circles represent respectively? (See Figure 2) Outer wall/inner wall of the outer tube, outer wall/inner wall of the inner tube. Question 3: Why does the pipe shrink inward at the bends? (See Figure 3) The elbow is a finished product, included in the system, while the pipe is in its actual size. There might be an issue with the library, or the outer diameter of the pipe does not match the specifications for process pipelines.
Question 1: What do these two diameters of the pipe represent (the pipe has insulation)? (See Figure 1) D1 is the outer diameter of the tube wall ； D2 is the inner diameter of the tube wall. Question 2: The pipe bends downward – why is it drawn in this way? What do the four circles represent respectively? (See Figure 2) Outer wall/inner wall of the outer tube, outer wall/inner wall of the inner tube. Question 3: Why does the pipe shrink inward at the bends? (See Figure 3) Either there is an issue with the drawing or the pipe has a reduced diameter
It should be the result exported from 3D software; to determine the specifics, one needs to look at the original image or the way it is presented in the 3D software