How to calculate materials for a process diagram
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We created a filtering device for users, and there is only one process drawing for it. Now, users need us to create actual pipeline layout diagrams based on the process drawings and calculate the materials required. I’m not sure if there are any relevant software or other methods.
This doesn’t seem to work; I’ve never heard of it. Generally, one starts with the piping based on the PID, and for smaller projects, no advanced software is necessary
It seems not; calculate it gradually based on the actual dimensions
First, determine the equipment layout, then the pipeline routing; after approval by the design supervisor and acceptance by the customer, the BOM is prepared.
It’s not possible, right? It should be done after the piping is installed that the calculations can be carried out. The pipe fittings that are shown in the flowchart can be calculated, but the length of the pipes, elbows, and things like that can only be determined after the piping is in place
The piping you mentioned has actually already begun to be installed on site. Now the client wants us to first prepare a budget for the materials as well as installation drawings for the site, and we don’t know how to do that.
Draw a rough layout of the equipment; based on the process diagram, indicate the simple paths of the pipes on this layout. Then estimate the length of each pipe one by one, and finally increase that length by 20%. For small projects, it’s better to have more materials than too little. The total amount of the extra is not that much either.
Weren’t we supposed to create an actual pipeline layout diagram? Once the pipeline layout diagram is ready, it’s possible to calculate the material requirements, right?
Material estimation is carried out after proper piping layout; the piping work can be done using regular CAD software, and then the required materials, including fittings, are calculated based on that piping layout.
Based on the equipment list in the process diagram, a model is created using CAD; then the model is positioned according to the on-site layout for piping, and finally the piping materials are counted
Generally, it is necessary to start with the piping based on the PID
Process diagrams certainly cannot be used for on-site construction; they have no value as a reference at all. The people who commented above have explained it very well, and the original poster might want to give it a try
I’ve also been troubled by similar problems recently
A piping diagram must be created first before anything can be recorded systematically
Construction drawings are supposed to include the pipe layout – wasn’t the pipe layout already prepared? Draw it according to the actual conditions and layout (as long as the actual situation complies with the standards), and then just tally up the materials.
With only the process drawings, it is only possible to determine the model and quantity of the equipment; only the installation drawings can reveal the quantity of materials required
I completely agree. Recently, my workplace has been carrying out expansion and technical upgrades. Doing it manually is simple, but drawing the piping diagrams is rather troublesome. We can’t use 3D tools like those in design institutes; we can only work manually. Even after finishing the drawing, compiling the statistical data is extremely troublesome.
The amount of material required can only be determined from the piping diagram; otherwise, from the process diagram, one can only count fittings such as tees and reducers, as well as valves, but it is not possible to determine the amount of material needed for the pipe sections
The material list mentioned by the poster is likely an estimated quantity, intended for use in preparing cost estimates. It’s sufficient to provide the number of main valves and fittings, as well as an approximate length of the pipes based on the pipe layout diagram. For items like elbows, etc., the length can be multiplied by a factor of around 1.1 to account for those details
The pipeline length on the drawing is multiplied by the drawing scale and then by a certain coefficient
First, draw the piping diagram, then calculate the materials required; however, valves do not need to wait for the piping diagram and can be counted first