Why must a predetermined tightening sequence be used when tightening the gage glass studs?

Using a predetermined tightening sequence when tightening the gage glass studs is essential to provide uniform compression on the sealing surfaces, which helps prevent leakage. This is because a consistent tightening sequence ensures that the pressure is evenly distributed across the entire seal. If the studs were tightened arbitrarily or out of sequence, it could result in uneven compression, leading to gaps or weak spots where leaks could occur. Uniform compression is crucial, especially in high-pressure systems, to maintain the integrity of the seals between the gage glass and the vessel it is attached to, thereby ensuring safe and efficient operation. This practice minimizes the risk of leaks that could not only compromise equipment function but also pose safety hazards.