What shape does the tube end take after proper flaring and is essential for sealing?

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Multiple Choice

What shape does the tube end take after proper flaring and is essential for sealing?

Explanation:
The necessary shape is a funnel-shaped flare, which provides a conical sealing surface for the flare nut. This taper allows the nut to clamp the flare so the metal-to-metal interface seals tightly when tightened, preventing leaks. A straight cylindrical end wouldn’t provide the tapered seat needed for sealing, a beveled edge is used for other joint types and won’t form the proper flare seal, and a curved end lacks the required taper to seat correctly with the fitting.

The necessary shape is a funnel-shaped flare, which provides a conical sealing surface for the flare nut. This taper allows the nut to clamp the flare so the metal-to-metal interface seals tightly when tightened, preventing leaks. A straight cylindrical end wouldn’t provide the tapered seat needed for sealing, a beveled edge is used for other joint types and won’t form the proper flare seal, and a curved end lacks the required taper to seat correctly with the fitting.

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