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Precautions for processing of heat exchange tubes in tube heat exchangers
Jan 24, 2019

The structure of the tube heat exchanger is basically composed of the container and the inner tube bundle, which is simple and firm, low in cost and strong in adaptability; the medium in the shell side of the tube heat exchanger should be a fluid which is clean and not fouled. For the tube heat exchanger, the processing quality of the heat exchange tube is one of the important factors to ensure the quality of the heat exchanger, and its processing should pay more attention.

 

When processing the heat exchange tubes in the tube heat exchanger, firstly, it must have an accurate length dimension to ensure the connection between the tube and the tube sheet; after cutting, the tube end needs to be smoothed to ensure the welding quality; The pipe shall be inspected one by one before assembly; in general, the whole pipe shall be used. When the length of the existing pipe cannot meet the requirements of the pipe, the welding butt joint may be considered, but 100% non-destructive inspection shall be performed, and the welding stress shall be eliminated; The surface of the heat pipe must not be scratched, especially austenitic stainless steel.

 

The quality of the connection between the tube and the tube sheet in the tube heat exchanger affects the use and life of the heat exchanger, and there are many factors affecting the quality of the connection. The most important factor is the choice of the connection method. The connection between the pipe and the tube sheet mainly includes expansion joint, welding, explosion connection and expansion joint.

 

The heat exchanger tube assembly of the tube heat exchanger is generally arranged by aligning one end of the tube plate and each of the baffles with a tie rod and a distance tube, and then placing the tube on a special tire, and one end of the rod is screwed into the tube sheet. The baffle is placed on the tie rod, and the distance between the rods is maintained by a distance tube that is placed on the rod. The last baffle is screwed onto the rod to be fastened.www.wxlsshzb.com


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