Pipeline drawing issues
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In an axonometric diagram, there is no indication of the flow direction of the medium; it only shows where the other end is connected. How should this be understood?
Axonometric drawings are used for piping; direction isn’t necessary, right?
Axonometric drawings are intended for construction teams; they only need the elevations and dimensions as well as the key shapes. Process engineers, on the other hand, need to refer to the PID
Without a flow direction, how can one know if the valve is oriented correctly?
Just use the process PID to review the flow sequence; this is an important aspect of the three inspections and four determinations. It’s about ensuring the correct direction of flow – many times the flow direction is reversed later on. Water traps, valves, control valves, etc. are fine, but during subsequent purging and cleaning it’s necessary to remove them from the system, and after they pass the inspection they need to be reinstalled. Just adjust the process to get this right
Oh, you didn’t quite understand what I meant. For example: following the flow direction, the tee should come before the valve, but the person who created the model or drew the diagram got it wrong, drawing the valve before the tee; this error wasn’t detected during verification, as there are many possible reasons for such mistakes. So, during construction, following the drawings would be a mistake. For last year’s project, there were two trestles similar to pipe tunnels; the designers were different. At the same elevation, the A and B pipes of Bridge 1 were swapped at Bridge 2, so that A was connected to B and B was connected to A. The designers were really ridiculous – they just went ahead and made it that way. Later, they upgraded the file themselves.
It’s normal. When pipes are created using 3D models, upon inspection you’ll find that many of them collide with each other. Axonometric views of pipes also belong to the category of 3D representations, so errors are inevitable. It’s not a highly mature technology; basically, there is always the need to make improvements while construction is in progress
Since it’s considered normal, then I have nothing to say.