What is the recommended slack percentage for installing flexible lines?

The recommended slack percentage for installing flexible lines is generally accepted to be between 5 to 8 percent. This range is important for ensuring that the flexible lines can accommodate movement and thermal expansion without causing undue stress or strain. Too little slack can result in the lines becoming overly tight, which may lead to failure or damage in the event of vibration, flexing, or thermal changes. Conversely, excessive slack can cause the lines to sag or become tangled, potentially leading to operational issues or hazards.

This range strikes a balance that allows for adequate flexibility and movement while maintaining the integrity and safety of the installation.