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|국가/구분||United States(US) Patent 등록|
|국제특허분류(IPC7판)||B21D-053/00 F28F-007/00 F16L-055/18|
|미국특허분류(USC)||29/1573 ; C ; 29/1573 ; R ; 29/40208 ; 29/40213|
|발명자 / 주소||
|출원인 / 주소||
|인용정보||피인용 횟수 : 11 인용 특허 : 3|
A method for remotely removing and replacing defective tube ends of heat exchanger tubes located adjacent a tubesheet. In the method, a rotary cutting tool is inserted into each defective tube and the tube end portion is cut at a location near the tubesheet, a weld joint between the tube and tubesheet is removed, and the defective tube is then withdrawn through the tubesheet opening. Next, the resulting exposed end of the existing tube is remotely machined using a special rotary cutting tool, then a new replacement tube is inserted through the tubesheet ...
A method for remotely removing and replacing a tube end portion attached to a tubesheet of a heat exchanger, comprising: (a) inserting a rotary cutting tool into a tube end portion and circumferentially severing the tube wall at a selected location near the tubesheet; (b) removing a weld joint located between the tube end portion and the tube sheet; (c) withdrawing the tube end portion out through the surrounding opening in the tubesheet; (d) inserting a new replacement tube into the tubesheet opening and axially positioning the new tube in axial alignme...