Manufacturing issues of fixed tube sheet heat exchangers
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When the fixed tube sheet serves as a flange as well, how are the flange holes on both sides prevented from twisting? For example, if the flange hole on one end is at the 9 o’clock position, the corresponding hole on the other end also needs to be at the 9 o’clock position. How is this achieved? This question has puzzled me for many years, as someone who works in an office
Go and check the site more often. Your question is great; I don’t even understand it
What I mean is, if one tube sheet that also serves as a flange moves axially toward the other tube sheet which also functions as a flange, ideally the bolt holes of each flange should be coaxial. But since these two are installed at the two ends of the cylinder, how can it be ensured that the bolt holes of each flange align with one another without any misalignment?
What I mean is, if one tube sheet that also serves as a flange moves axially toward the opposite tube sheet, which also functions as a flange, the ideal situation would be for the bolt holes of each flange to be coaxial. But since these two are installed at the two ends of the cylinder, how can it be ensured that the bolt holes of each flange align with one another without any misalignment (by misalignment I mean the twisting mentioned earlier)?
This should be measured in advance, right? If it’s a straight tube, can’t the tube just be rotated?
It’s sufficient to arrange the bolt holes at the midpoints on both ends
The problem is how to accurately find this “middle” point
When installed, the off-axis heat exchange tubes are not parallel to the axis of the cylinder
Your worries are unfounded; go to the workshop and see how a heat exchanger is assembled, and you won’t worry anymore. You need to spend more time on the ground level;P