What two welding methods can be used for piping over 2 inches in diameter?

The correct answer highlights two welding methods, socket welding and butt welding, that are both suitable for pipes with diameters exceeding 2 inches.

Socket welding involves inserting one pipe into another and welding around the joint. This method is advantageous because it creates a strong and leak-proof joint suitable for high-pressure applications, such as those found in boilers. It is particularly useful for small piping systems that need to handle pressure effectively.

Butt welding, on the other hand, involves aligning the ends of two pipe sections and welding them together at that joint. This method provides a continuous seam around the circumference of the pipes, which is essential for maintaining integrity in high-pressure operations. It is commonly used in larger, high-pressure systems, ensuring that the welded joints can withstand the stress and potential thermal expansion associated with high temperatures.

Using these welding methods on larger pipes ensures that the connections can handle the demands of high-pressure environments safely and efficiently.