Quote:
Originally Posted by Flieger
OK, now I see. Your preload of the bolts is not really important? That is, there is not going to be significant pressure or loading on the bolts, they are just there to maintain seal integrity?
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Essentially this is correct. The bolts are 1.25-7UNC x 21.625 lg Inconel 718. Operationally, it is important that the knife edges penetrate the soft iron seal in a controlled manner (i.e. the preload on the bolts must be evenly distributed during the 5 torque cycles), but ultimately the proof is in the seal performance. External loads in service are negligible. Eight 1.25" bolts at 900 ft-lbs are generating quite a bit of clamping force, so this thing's not going anywhere.
