PDMS tube bottom elevation issue
Thread Content
I have a question for the experts here: when generating ISO drawings in PDMS, we usually round the elevation of the bottom of the pipes when designing the piping. However, in the ISO drawings produced automatically by PDMS, the elevation takes into account the outer diameter of the pipes; as the elevation of the pipe bottom is supposed to be an integer, it becomes non-integer after the outer diameter is included. This feels inconvenient. Is it possible to adjust PDMS so that it does not include the outer diameter in the ISO drawings, and only shows the elevation of the pipe bottom?
The outer diameter of the pipe itself is not an integer. When you create the model, is it because the center of the pipeline is an integer that this phenomenon occurs?
If I remember correctly, in PDMS, for the ISO diagrams of twin pipes, the elevation of the pipes is based on the elevation of their centers; the elevation of the pipe bottoms can be found by selecting the relevant elements in the model and then using Q ABOP or Q LBOP to get that information. In PDMS models, the distance between pipes is generally calculated based on their outer diameters, so the elevation of the centers is also determined according to the outer diameter of the pipes. As for your claim that the ISO data directly shows the elevation of the pipe bottoms, I really haven’t seen that happen before. However, when creating cross-sectional views, it’s possible to indicate the elevation of the pipe bottoms~
No, when we create models, we round the bottom of the pipe, but when PDMS generates the ISO diagram, it marks the center of the pipe; therefore, whole numbers cannot be seen in the ISO diagram. The main purpose of rounding the bottom of the pipes is to facilitate the alignment of a row of pipes, as well as to make the construction of pipe supports easier.
When creating the plan views, the elevation indicated is that of the bottom of the pipe. I discussed this with a colleague from my company today; he said that in current software, the elevations are marked based on the centerline of the pipe, but in the past, when drawing ISO diagrams by hand, the elevation of the pipe bottom was used. I don’t understand why PDMS doesn’t take this into account and insists on using the elevation of the pipe’s centerline instead.
The PDMS software is set up in this way to facilitate on-site material removal. If you want to check whether the bottom of the pipe is level, it is recommended to take a look at the layout diagram.
There’s no need to draw a layout~ Just click on the fitting and enter the command: q abop or q lbop~
Personally, I think they must have considered this~ because your ISO diagram is meant to be used in conjunction with the piping layout diagram~
Since the pipes in the pipe tray are usually shown in plan view, BOP is used, whereas ordinary pipes are typically marked with their centers.