Which of the following is NOT a feature of a shoulder nipple?

A shoulder nipple is a pipe fitting characterized by its specific design features. The primary function of a shoulder nipple is to connect two pipes, and it typically includes a shoulder that supports the fitting.

The threaded ends are a distinguishing characteristic, allowing the nipple to be screwed into other fittings securely. Additionally, the short unthreaded section between the threads provides a smooth transition, aiding in alignment and preventing damage to the threads during installation.

Shoulder nipples are versatile components used in various applications, including both liquid and gas services. They can withstand pressure and create tight seals, making them suitable for these types of systems. However, when it comes to their predominant usage, they tend to be favored for liquid applications due to their design and sealing capabilities.

Therefore, saying that shoulder nipples are used primarily in gas applications does not accurately reflect their more common use in liquid services, which makes that statement the one not aligned with the characteristics of a shoulder nipple.