How can you identify a flareless fitting compared to a flare-type fitting?

Identifying a flareless fitting in comparison to a flare-type fitting is primarily based on the structural design of the fittings. Flareless fittings are distinct because they do not have a flare cone, which is a key feature of flare-type fittings. The absence of a flare cone means that the sealing mechanism of flareless fittings relies on a different approach, typically using a ring that compresses against the tubing to create a seal.

Flare-type fittings, on the other hand, are designed with a conical flare that helps ensure a tight and leak-free connection when the fitting is tightened. This design is crucial for applications where high pressure is involved and helps to distribute the stress along the tubing surface.

While it is true that flareless fittings may sometimes be smaller, size is not a definitive feature that distinguishes them; different types of fittings can come in various sizes. Additionally, the color or painting of fittings does not serve as a standard indicator of their type, and the cost comparison can vary widely based on manufacturer and application, rather than being a consistent differentiator between flare and flareless fittings. Therefore, the defining characteristic setting flareless fittings apart from flare-type fittings is indeed the lack of a flare cone.