When tightening flared fittings, how much should they be tightened after achieving hand tight?

When tightening flared fittings, the proper approach is to first achieve a hand tight connection and then apply additional torque based on the size of the fitting. In this case, after reaching hand tight, it is recommended to tighten fittings under 5/8” by an additional quarter turn, while larger sizes require only an eighth turn. This method ensures a secure connection without over-tightening, which can damage the fittings or lead to leaks.

It’s essential to adhere to these specifications because different sizes of fittings can handle varying amounts of torque. Smaller fittings may become damaged if excessively tightened, while larger fittings can adequately manage slightly more torque. This incremental approach balances the integrity and safety of the connection while preventing potential issues associated with over-tightening. Proper tightening is crucial in applications involving pressure and fluid transfer, as it maintains system integrity and functionality.