Differences Between Socket Weld and Butt Weld for Valves

Socket weld refers to inserting one end of the pipe into the object to be welded. It features easy positioning, convenient welding and high strength. The socket weld seam is a fillet weld. Socket weld has higher pressure resistance and is commonly used for high-pressure components. Socket weld involves inserting the connecting pipe into the tube sheet, and its weld is called a fillet joint. Specifically, socket weld is to insert the pipe into the flange or pipe fitting, and weld a fillet weld at the interface. The interface of the flange or pipe fitting is larger than the pipe, with a bearing platform for the pipe to insert into.

Butt weld refers to butting the end faces of two objects together for welding. It is not easy to align, and the welding strength is relatively lower. The butt weld seam is a butt weld. Butt weld is generally suitable for low-pressure pipelines and commonly used for low-pressure valves. The connecting pipe for butt weld is a convex pipe. Butt weld is a butt joint; the pipe has the same size as the flange or pipe fitting at the joint, and the interface is butted (i.e., flat).