A specific sequence detailing the tightening order of fasteners on a circular connector featuring twelve bolts. This order ensures even distribution of clamping force across the connected surfaces. For example, a common sequence begins by lightly tightening a bolt, then moving to the bolt directly opposite, and continuing in a crisscross fashion until all are snug. This is followed by incremental increases in torque applied in the same sequence until the specified final torque value is reached.
Properly executing this sequence is crucial for maintaining a leak-proof seal, preventing distortion of the flange faces, and ensuring the longevity of the connected components. Uneven tightening can lead to stress concentrations, premature failure of gaskets, and potential loosening of the bolts due to vibration. Historically, these sequences have been developed through extensive testing and engineering analysis to optimize joint integrity.
