Question

How tight should a MS flareless fitting be tightened?

Answer 1

When tightening an MS flareless fitting, the nut should be tightened until a sudden and noticeable wrench resistance is evident, and then an additional 1/6 to 1/4 turn should be applied

1

. It's important to avoid using wrench torque as the gauge for reliable flareless preset and assembly, as the reliability of the preset and assembly is dependent on the ferrule traveling a certain distance into the tapered fitting throat to create a strong grip and seal

1

. Additionally, repeated assembly tests have confirmed the validity of existing torque values for MS flareless fluid connectors

3

. Therefore, following these guidelines will help ensure a proper and secure connection when tightening MS flareless fittings.

Answer 2

When tightening an MS flareless fitting, it is important to use the correct torque value. Over-tightening or under-tightening can cause issues. Refer to the manufacturer's instructions for the specific torque value.

Step-by-step explanation:

When tightening an MS flareless fitting, it is important to use the correct torque value. The fitting should be tightened until it reaches the specified torque value based on the manufacturer's guidelines. Over-tightening can cause damage to the fitting, while under-tightening can result in leaks.

For example, let's say the manufacturer specifies a torque value of 25 Nm for the fitting. To ensure proper tightening, you can use a torque wrench set to 25 Nm and gradually tighten the fitting until the wrench clicks or indicates that the desired torque has been reached.

It is important to note that the specific torque value may vary depending on the size and material of the fitting, so always refer to the manufacturer's instructions for the correct torque value.