What is a long seam weld on a vessel?

A long seam weld on a vessel is a continuous weld that runs along the length of the cylindrical structure, typically used to join two edges of metal plates together. This type of weld is crucial for maintaining the strength and integrity of the vessel, especially under pressure. It is commonly found in the construction of tanks, pipes, and boilers, where it ensures a secure and leak-proof connection. Long seam welding can be performed using various techniques, including electric arc welding and submerged arc welding.