Welding together DN 50 and smaller pipe is typically done using which method?

The socket welded method is commonly used for joining DN 50 (2-inch) and smaller pipes due to its simplicity and effectiveness. In this method, one pipe fits snugly into a socket on another pipe, and the connection is made by welding around the joint. This technique provides a strong, durable bond while maintaining a smooth flow through the pipes, which is critical in many piping applications.

Moreover, the socket welded method is favored in situations where pipes may not experience extensive mechanical stress, making it ideal for smaller pipe sizes. It is straightforward to implement, requiring less preparation compared to other methods, and is particularly useful in applications where space is limited, as it does not require complex alignment.

In contrast, other methods like screw thread involve joining parts with threads, which can introduce stress points that may not be desirable in smaller pipes. Fillet and capillary welding methods, while useful in specific applications, generally involve more complexity and specific joint designs that are not as commonly applicable to small pipe sizes. Thus, the socket welded method stands out as the most practical and efficient choice for welding DN 50 and smaller pipes.