What is bolt tightning sequence in 28 bolt flange?

The bolt tightening sequence for a 28-bolt flange typically follows a star or crisscross pattern to ensure even distribution of stress and prevent distortion. This means starting from a specified bolt (often the top or a designated bolt) and tightening sequentially to the opposite bolt, then moving to the adjacent bolts in a systematic manner. This method helps achieve a uniform clamp load across all bolts, which is crucial for maintaining a proper seal and structural integrity. Always refer to the specific manufacturer's guidelines for the exact sequence and torque specifications.