Are there any requirements regarding the wall thickness of the tubes during expansion jointing?
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Are there any requirements regarding the wall thickness of the tubes during expansion jointing? That is, is there a limit on the minimum wall thickness?
During expansion, an appropriate expansion ratio should be determined based on the test results, and the diameter and wall thickness of the end portion of the heat exchange tube should be measured.
Expansion jointing of pipes is definitely related to the wall thickness of the pipes; it generally shouldn’t be too thin, as thin walls make the pipes prone to cracking. A thickness of over 2 mm is usually required. On the other hand, the wall thickness shouldn’t be too thick either, as this will exceed the capacity of the expansion device. The thickest pipes we have ever processed had a wall thickness of 3.5 mm
Is 1.2mm or 1.5mm thickness okay? This post was last edited by jia717 on 2009-3-12 21:39]
1.2mm pipes can be expanded, but an appropriate expansion joint must be selected; otherwise the pipe may burst.
Over 2mm. An appropriate expansion joint should be selected. Last edited by jia717 on 2009-3-12 21:46.]
Our unit has expanded 304 tubes to 1.0 mm, and neither electric expansion nor electric pressing expansion poses any problems.