Is there a small, free piping single-line diagram drawing plugin?

You can try AutoCAD’s DataExtraction tool, which can help create material lists. There are also many plugins in AutoCAD specifically designed for pipeline design, such as CADWorx Plant Professional. Additionally, SolidWorks Piping is also a good option; although it supports 3D, it can also generate planar piping single-line diagrams. All these tools can perform inclined dimensioning and automatically generate material lists, but a legitimate license may be required for purchase. If the budget is limited, consider using open-source or free software such as LibreCAD, although some specific functions may need to be handled manually. .

Thank you for your reply. The main 3D software is used for modeling, which is a complicated process that involves positioning nozzles on equipment; high precision is required for modeling, as well as strong computer hardware specifications. As a construction company, we do not have enough time to work with 3D models. However, it is sufficient to create simple line drawings, indicate the necessary dimensions and basic information, and prepare a material list；

Based on the moderator’s previous description, it seems that the construction drawings should be added after the construction is completed, to be used as part of the archives for the completed project. My personal advice is to create 3D models; prepare the computer software in advance, and once the construction is completed on that day, you can create a 3D diagram of the pipes right away. Since the drawings are based on the actual construction, the route of the pipes has already been determined, and with a rough sketch available, it would take only about as long as the time it takes to smoke a cigarette to create the 3D diagrams of the pipes for one day’s worth of work. Once the construction is completed, the single-line diagram can be exported the following day for printing and archiving.

Thank you for your answer. I’ve actually used CADWORX as well; I created models using it in the early stages of the project. Since it was a purification workshop in a pharmaceutical factory, the pipelines there were extremely complex, and there were many different types of equipment, all with various shapes. The models were created initially to facilitate construction, and many of the equipment was depicted only roughly, so the accuracy wasn’t very high. As a result, there were also some errors in the pipeline lengths. Later on, there were too many changes, and the computer became increasingly sluggish, which became quite problematic :L； The most important thing is that the audits are extremely strict; if there’s even the slightest error in my measurements, I’ll be criticized, and they won’t check the measurements on-site with me anymore. Instead, I’m forced to check the lengths myself and submit another application for verification next time! So, with no other choice, we have to manually draw 2D line diagrams on site ；

The modeling in the picture is really beautiful. The key is still to deal with the auditors. As long as construction is carried out in accordance with the design and minor adjustments are made on site, it does not affect the verification of the total volume of work, and everything remains within reasonable limits. Moreover, it's quite normal for there to be some errors in pipeline construction. It’s impossible to achieve exact consistency in on-site construction layout and material cutting. I guess the review process is quite rigid.

What software is used for modeling? It’s excellent