Inspection issues after strength welding and expansion bonding of heat exchange tubes and tube sheets!
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I would like to ask everyone: Is non-destructive testing required for heat exchanger tubes and tube sheets after strength welding and gasket pressing? What kind of tests are needed if required, and what are the requirements? ? Thank you! ! !
It mainly depends on the application conditions. Under harsh conditions, He leak testing is required, and RT testing is carried out using a radiation source.
Our company conducts magnetic particle or penetrant surface testing on all welded joints
An NDE is generally required. For pressure vessels made of CS material, MT is used; ammonia leak testing or helium leak testing is chosen depending on the properties of the medium. For SS material/non-ferrous metals, PT is used, with ammonia leak testing or helium leak testing decided based on the characteristics of the medium. Some international engineering companies require RT testing as well.
We usually conduct a penetrant inspection; currently, many standards for welding joints of special material pipes and tube sheets require such inspections, for example, in the case of titanium materials, JB/T4745-2002 \"Welded Titanium Vessels\" mandates the use of penetrant inspection
It is generally checked using a PT test or a hydraulic test