16inch rotatable pipe flange joint

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Discussion Overview

The discussion revolves around designing a rotatable joint for a 16-inch diameter pipe in a dust cleaning system for induction furnaces. The focus is on achieving a mechanism that allows for rotation without leakages, considering factors such as temperature and movement.

Discussion Character

  • Technical explanation, Debate/contested, Experimental/applied

Main Points Raised

  • One participant seeks advice on creating a mechanism for a rotating pipe joint that prevents leakages.
  • Another participant questions whether continuous rotation is necessary or if a limited oscillation would suffice, suggesting the possibility of using a sleeve for sealing.
  • A participant clarifies that only a 40-degree rotation is needed and expresses concerns about the durability of seals due to temperature and movement.
  • One suggestion proposes submerging the joint in water to mitigate dust leakage, although this may not be feasible if the pipe must remain hot.
  • A participant considers using a non-moving seal, such as a braided stainless steel hose, which could flex and twist while being bonded to the pipe ends.

Areas of Agreement / Disagreement

Participants present multiple competing views regarding the best approach to sealing the joint and the feasibility of different designs. The discussion remains unresolved with no consensus on the optimal solution.

Contextual Notes

Participants express concerns about the wear of seals due to high temperatures and movement, indicating limitations in current sealing technologies. The discussion does not resolve the technical challenges presented.

NTzionIST
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I am making a dust cleaning system for induction furnaces in my steel mill and for that I have to design a mechanism with which about 7m length of 16inch diameter pipe can rotate about an elbow attached to one end but wihtout any leakages. ANY HELP would be appreciated.
 
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Do you need the capability of constant (ie. >360°) rotation, or is back-and-forth like an oscillating fan okay? If the latter, could you sleeve over the joint for sealing as opposed to having the joint itself leak-proof?
 
No I just need a rotation of about 40 degrees. I did think about the sleeve over the joint but I guess the seal will have the same problem of wearing out because of the temperature as well as movement.
 
Would it be cheaper to submerge the joint in water?
That would solve the dust leakage at least, unless the pipe is white hot and has to stay that way.
 
NTzionIST said:
I guess the seal will have the same problem of wearing out because of the temperature as well as movement.

I was actually thinking of having the seal not move at all. Something along the line of braided stainless steel hose might be able to flex and twist enough that the ends could be bonded to the pipe.
 

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