What type of welding process is resistance seam welding primarily used for?

Resistance seam welding is specifically utilized for creating continuous seams in overlapping workpieces. This process involves the application of electrical resistance heat generated at the interface of the metals being joined, which is sufficient to melt and fuse the material together along a continuous line. The overlapping metal sheets are fed through the welding machine, where electrodes apply pressure and pass an electric current to achieve a strong and consistent seam.

This method is particularly beneficial in applications where a continuous and watertight seal is essential, such as in the manufacturing of tanks, ducts, and other products that require durability and integrity in their joints. The efficiency and speed of resistance seam welding make it a preferred choice for mass production of products that require long, uniform welds.