Flange bolt issue
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Why are no bolt holes arranged along the axis direction in the design of bolt holes for the middle flange?
Why are the holes for flange bolts arranged \"equally spaced across the span\"? Check this post to see if it contains what you need. http://bbs.hcbbs.com/viewthread.php?tid=172075&highlight=%BF%E7%D6%D0
This should be an unwritten customary rule.
1. The bolts are arranged at the midpoint of the span so that each bolt is subjected to roughly equal forces, thereby ensuring the sealing performance of the flange. With this centered arrangement, when the pipeline is laid horizontally, the topmost bolts are under tension while the bottommost bolts are under compression; however, with the bolts distributed at the midpoint, the situation improves. 2. By arranging the bolts evenly at the 6 o’clock position (the lowest point), there are no bolts in that area, which prevents corrosive substances inside the pipeline from reaching and corroding the threads of the bolts. 3. The even distribution of bolts at the midpoint is also intended to take into account situations where the working space is limited; this arrangement facilitates workers’ use of tools such as wrenches.
The 4th floor explained it very clearly; I’ve learned it. .
What 4# said is absolutely right! ~~~ One more thing: when installing a wafer-type butterfly valve, if the bolt holes are located on the axis line, then the pair of bolts on the upper and lower axes will be blocked by the handle of the butterfly valve. Therefore, as an engineer, it is important to be good at learning and to pay attention to the details! The original poster’s spirit of asking questions and being eager to learn is indeed praiseworthy