Please ask experienced project personnel for guidance
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This post was last edited by zbx on 2009-10-8 at 23:27. I am working on a project and have now reached the stage of finalizing the calculation of the materials required. I have a few questions that are not entirely clear to me, so I would appreciate guidance from experienced colleagues: 1. When calculating the amount of pipes needed, does it refer to the \"centerline of the pipe\", including valves and tees located on the same pipe? What exactly is meant by the \"centerline of the pipe\"? Does the pipe extension refer to the outside of the tee’s diameter or the middle of the pipe where the tee (or elbow) is located? 2. In steel structures, is the calculation of I-beams based on the actual amount used or does it include the edges of the frame? If it includes those edges, isn’t that an overestimation of the material usage? Or is it necessary to take those into account in some cases? 3. Is the statistics on fluorinated lining materials the same as those in “1”? If so, then the figures listed are higher than the actual amount, because what is measured is the total length of the pipes, including the thickness of valves, tees, and even gaskets. I’m a beginner and participating in a project for the first time; I really want to understand this. My expression might not be perfect, but experienced colleagues will surely understand what I mean. I’ve debated this with Party B several times; they provided the relevant standards, which state things in that way, but the terminology is too technical and I don’t quite understand it. Also, is there a difference between \"engineering quantities\" and \"material quantities\"? Does the latter include material losses? If so, what quantities should we be using for our calculations? I’m just the one who does the actual work on the ground, and I don’t want any major errors in the statistics. I need an urgent answer
This post was last edited by ms3210 on 2009-10-9 20:09. I don’t work at a design firm and don’t have much experience, so I’m posting this to learn from others!
The last edit to this post was made by ms3210 on 2009-10-10 at 09:46. 1. The statistics regarding pipe usage refer to the length of the pipe extensions leading to the middle of the pipe where the tee connection is located. 2. In steel structures, the calculation of the amount of channel steel used is based on the actual quantity employed, including that used for the frame edges. 3. Fluorinated lining materials are not included in the calculations; valves and tees are also excluded. “Engineering usage volume” refers to the amount specified in the pricing standards, while “material usage volume” takes into account material losses and is used to calculate the cost of the main materials
Hehe. . . It’s too late for you to ask these questions now. If you took on this task towards the end, you might become a scapegoat, as problems are bound to arise in the initial stages; otherwise, someone wouldn’t be replaced. If you were working with this input from the start of the project and only ask these questions now, you’re doomed.
This post was last edited by ms3210 on 2009-10-12 07:55. Thank you to all the friends above for their help; unfortunately, I can’t give any points, so I can only say thank you, especially to the friend from the third floor.
What was said on the 3rd floor is correct, but when calculating based on corrosion resistance considerations, the length of tees/valves should be included in the calculation, as it is a matter of determining the workload; once the unit price per item is established before work begins, that’s sufficient.
What was said on the 6th floor is correct: on anti-corrosion pipes, tees, elbows, valves, etc., all need to undergo anti-corrosion treatment of at least the same level. So, it needs to be calculated. . .