How was the number of valves and pipes in the preliminary design determined?
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Our department’s standard practice is as follows: after the piping staff receives the initial version of the process, they carry out manual counting (a rather primitive method); 1. The valves are identified one by one according to their type； 2. The length of the pipeline is estimated based on the layout diagram ； I’d like to hear how everyone does it, and if there are any more advanced and efficient methods. Everyone is welcome to participate actively in the discussion. This post was last edited by hutom123 on 2009-3-24 16:50]
That’s the way to do it; it’s not much work at all
Valves can be clearly counted according to the flowchart (PID). The pipe length can only be estimated based on the layout diagram. If there is a similar device, its materials can be used as a reference. If not, make every effort to ensure the accuracy of the data for large-diameter, stainless steel, and specialty material pipes. Fittings can be estimated at 25–30% of the total pipeline cost (the proportion varies depending on the type of installation!) ).
Manual counting: It is recommended to use a mini-program to convert the data into a line chart during the counting process
In our department, we do the calculations manually, marking each point one by one; the length of the pipes is also measured.
Alas! ! The transformation of advanced domestic technology into productivity is incredibly slow. Today, 3D design is the standard for pipeline design, with all materials being automatically calculated by computers. With one command, you can obtain all the materials you need in just a few minutes.
I would like to ask about the 6th floor: what is the software used for 3D pipeline design? Is it CAD?
Are the 3D piping software programs PDS and PDMS? Now CADWorx Plant can also be used to create 3D piping diagrams
The number of valves can be calculated manually using PID, but it is also necessary to include the drain valves at the lowest points and the vent valves at the highest points. If there are no control valves specified in the PID, those valves still need to be added. Although they are all low-diameter valves, their number can be quite significant!
Calculated by hand. We are still far behind! !
Both the length of valves and pipes can be calculated using 3D software. I’m currently using Cadworx. If you want to learn more about this, go to the CAD section of the forum – there are many discussions on that topic. As for PDS and PDMS, they’re too complex; they’re not something that small design firms like ours can afford to use, haha
During the preliminary design stage, valves are of course counted, while pipes are estimated; it’s mainly the bulk materials that are considered. What does this have to do with backwardness?
Manual counting is so annoying; it took me months to complete the statistics for one project, and yet problems still arise during installation.
Manual counting still accounts for the majority! Using 3D software for statistics yields more accurate results, but the software is expensive! A small courtyard generally can’t handle it! When doing manual counting, it is done by checking item by item based on the PID and the pipe layout diagram!
There’s no faster or better way; you just have to do it manually
Most of it is counted manually, but it’s not necessary to be that precise. However, in our company, once we take on a project, we start by using 3D to arrange the pipes; it takes about a month to get the pipes arranged to a satisfactory level, after which we can use software to conduct an initial calculation.
Software-based statistics should be accurate and faster as well.