04593568 is referenced by 26 patents and cites 3 patents.

To monitor the deterioration of a weld (10) between a tube (11) and tube plate (12) which has been repaired by a repair sleeve (14) inside the tube and brazed at one end to the tube, ultrasound from a crystal (21) at the end of a rod (24) is launched into the tube through the braze (15) and allowed to travel along the tube to the weld and be reflected back along the tube. The technique may also be used for the type of heat exchanger in which, during construction, the tubes are welded to the tube plate via external sleeves in which case the ultrasound is used in a similar manner to inspect the sleeve/tube plate weld.

Title
Ultrasonic inspection of tube to tube plate welds
Application Number
6/691002
Publication Number
4593568
Application Date
January 14, 1985
Publication Date
June 10, 1986
Inventor
Thomas S Peat
Halkirk
GB
David W Telford
Thurso
GB
Agent
William R Hinds
Assignee
United Kingdom Atomic Energy Authority
GB
IPC
G01N 29/04
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