New York Low Pressure Boiler COF Practice

What type of welding is required for all piping over 2 inches?

1. Butt welded

2. Screwed

3. Fillet welded

4. Flanged

The correct answer is: Butt welded

The requirement for butt welding for all piping over 2 inches is primarily due to the need for strong, leak-proof connections that can withstand higher pressures and temperatures commonly associated with larger pipe sizes. Butt welding creates a seamless joint by fusing the ends of two pieces of pipe together, which provides excellent structural integrity and durability, making it suitable for critical applications within boiler systems. In contrast, screwed connections may not provide the same level of strength and are generally used for smaller diameters or less critical applications. Fillet welding, while useful in certain situations, does not offer the same degree of joint strength as butt welding for larger pipe diameters. Flanged connections can be employed for ease of assembly and maintenance, but they require additional components and are not always appropriate for high-pressure systems. In summary, butt welding is mandated for pipes over 2 inches to ensure safety and reliability in high-demand environments such as boiler systems.