New Mexico Pipe Fitter Journeyman (JPF) Practice Exam

Which type of flange is characterized by being welded to the pipe in two locations?

1. Welding neck flange

2. Slip-on flange

3. Blind flange

4. Threaded flange

The correct answer is: Slip-on flange

The correct answer is a slip-on flange. A slip-on flange is designed to fit over the outside of a pipe, allowing it to be welded on both the inner and outer edges. This dual weld feature provides a strong connection that withstands pressure and load while facilitating easier alignment of the piping system during installation. The design of the slip-on flange makes it versatile for various applications, as it enables quick assembly and disassembly if maintenance is needed. Additionally, because of its construction, it can be used in systems where the space is limited, making it a practical choice for many piping configurations. Other flange types, such as the welding neck flange, are typically welded only at the neck, thus not having welds in two distinct locations. A blind flange is designed to close the end of a piping system and does not have a pipe connection whatsoever. Meanwhile, a threaded flange would involve a threaded connection to the pipe rather than a welded one. These characteristics differentiate the slip-on flange clearly as the option that meets the criteria of being welded in two places, emphasizing its functionality and reliability within piping systems.