General - AM.I.D.K3 - Rigid line fabrication, installation, and inspection techniques/practices Flashcards
1
Q
How should an MS flareless fitting be tightened?
A
Tighten the fitting by hand until it is snug, and then turn it with a wrench for 1/6 turn to 1/3 turn. Never turn it more than 1/3 turn with a wrench
1
Q
What damage can be caused by overtightening an MS flareless fitting?
A
Overtightening drives the cutting edge of the sleeve deep into the tube and weakens it
2
Q
What kind of rigid tubing can be flared with a double flare?
A
5052-O and 6061-T aluminium allow tubing in sizes from 1/8” to 3/8” outside diameter
3
Q
What should be done to the end of a tube that is to be flared?
A
The cut end should be polished to removed any sharp edges that could cause the tubing to crack
