Patent ID: 9174301
Filing Date: 2015-11-03
Classification: B23K,F28D,F28F

Abstract:
1. A method for forming a joint between a tube and a tubesheet comprising: positioning a first end of a tube substantially flush with a major surface of a tubesheet, the tube having a substantially same outer diameter from the first end of the tube to a second end of the tube, the outer diameter of the tube being substantially equal to an inner diameter of an opening in the tubesheet; inserting an anvil assembly comprising an expandable anchor portion at least partially within the first end of the tube; coupling a tool to the anvil assembly and rotating the tool to expand the expandable anchor portion; welding the first end of the tube to the tubesheet; coupling the tool to the anvil assembly and rotating the tool to contract the expandable anchor portion; and removing the anvil assembly from the tube.