New York Low Pressure Boiler COF Practice 2025 - Free Practice Questions and Study Guide

The correct choice highlights that in addition to being butt welded, all piping over 2 inches can also be connected through socket welding or flanged connections. Socket welding involves inserting the pipe into a socket end of a fitting and then welding around the joint. This method is effective for creating strong, leak-proof connections in piping systems, particularly in high-pressure applications.

Flanged connections involve the use of flanges, which are flat pieces of material attached to the pipe and fitted with bolt holes. These flanges allow for easy assembly and disassembly, making maintenance and inspection simpler while also providing a robust seal. This flexibility in connection methods is crucial in various installations and allows for the versatility needed in mechanical systems.

The other options either include methods not suitable for all piping over 2 inches or misrepresent acceptable practices within plumbing and piping regulations. For instance, gluing is typically used for plastic piping, not for metal piping over 2 inches. Similarly, clamped connections may not provide the necessary strength or integrity required for larger diameter pipes where high pressures could be involved.

Understanding these methods and their applications is important for ensuring the safety and efficacy of a boiler system.