WELDING METHOD FOR SHELL AND TUBE

摘要

The present invention relates to a shell and tube welding method and specifically, to a shell and tube welding method for welding a tube in a tube insertion hole penetrating a tube sheet of a shell and tube heat exchanger. The shell and tube welding method comprises: a tube sheet groove forming step of forming an annular tube sheet groove at a position separated outward from the tube insertion hole as much as a predetermined distance on one surface of the tube sheet; a tube bonding member inserting step of inserting a cylindrical tube bonding member with the diameter same as the tube in the tube insertion hole of the tube sheet; a tube inserting step of inserting one end of the tube in a specific direction of the tube sheet so that one end of the tube can be positioned within the recessed range of the tube sheet groove while being in contact with one end of the tube bonding member; a tube welding step of welding the other end of the tube bonding member on the other surface of the tube sheet; and a shell welding step of welding one end of the tube bonding member and one end of the tube on one surface of the tube sheet by inserting a welding torch into the tube bonding member.