Final answer:
Over tightening an MS flareless fitting can cause deformation, leaks, fractures, and stripped threads, compromising the integrity of the fluid system.
Step-by-step explanation:
Over tightening an MS flareless fitting, also known as a compression fitting, can lead to several types of damage. paramount among them is the deformation of the fitting and the tubing it attaches to. This can compromise the seal, leading to potential leaks. Constant pressure beyond the recommended torque can also lead to fractures of the fitting components or the tube itself, especially if the system is subject to vibration or thermal cycling. Furthermore, excessive stress may strip the threads of the fitting, making it difficult to remove or adjust later on. Correct installation practices must be followed to maintain the integrity and reliability of the fluid system within which the flareless fitting is used.