How to understand that ’the bolt holes in the flange of the head should be arranged so as to cross the alignment line passing through the center of the head and the center of the pipe’"
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The flange was positioned at the mid-span many years ago; I thought I understood it then. Today, I came across this statement: “The bolt holes in the flange of the head should be arranged at the midpoint of the alignment line that passes through the center of the head and the center of the nozzle,” and it was a bit confusing to me. Is it the same as what’s correct below? Please help to clarify this. Also, for the horizontal connections on horizontal tanks, is it still necessary to place the flanges at the mid-span? What standards specify this?
The pictures can be found at this link: https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=172075&extra=&page=1. I can’t send pictures
In other words, it is arranged at the mid-span, using the line connecting the center of the head and the center of the nozzle opening as a reference. Do you understand? :lol
I understand it the same way, but it’s probably the wrong image that corresponds to it, right? Then it’s not correct, right?
The nozzles on the head actually differ between horizontal and vertical containers. The images mentioned in the \"Frequently Asked Questions\" refer to the nozzles on the heads of horizontal containers. For vertical containers, the bolt holes need to be arranged in accordance with the direction in which the piping leads outward; however, in practical engineering work, no one really pays close attention to this aspect in the case of vertical containers”
The image you’re referring to shows a horizontal container; in my opinion, the so-called requirement regarding the midpoint actually refers more accurately to the midpoint measured with respect to the vertical line through the ground for the horizontally extending pipe flanges.
The image doesn’t refer to a horizontal container, right? Can’t it be used on the head of a vertical vessel? I’m referring to the pictures in the book *Problems and Methods*, not the drawings created by some poster themselves.
Yes, by looking at those explanatory notes, which explain why such requirements exist from the perspective of flange tightening procedures and liquid medium leakage, it becomes clear.
For horizontal nozzles on horizontal vessels, it is sufficient that the bolts are not at the lowest point.
On horizontal tanks, aren’t the horizontal connections all at the same level? Is there a lowest one?