If the flare is done incorrectly, what is the primary risk?

• A. Leaks
• B. Better heat conduction
• C. Stronger joint
• D. Reduced cost

Answer: (A)

Flare joints seal because the flare surface is precisely formed to press against the matching seat when the nut is tightened. If the flare is cut or formed incorrectly—crooked, nicked, cracked, or not at the proper angle—the seal won’t form properly, creating a leak path under pressure. That leak is the primary risk because it can release gas or refrigerant, leading to safety hazards, environmental concerns, and degraded system performance. An improper flare won’t improve heat transfer or make a stronger joint; and while it can increase costs due to rework, the key danger is the loss of containment.