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coastalforu
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Popular Science - Cosmology - New Member

Join Date: Sep 2009
Posts: 16
Good Answers: 1

Minimum Acceptable Tube Thickness

08/16/2010 12:17 PM

I need to determine the minimum acceptable wall thickness for brass tubes in a heat exchanger. Tubes have been rubbed by the baffle plates in some areas. I've looked through TEMA and can't find anything.
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
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#1

Re: Minimum Acceptable Tube Thickness

08/17/2010 3:46 AM

OK. Do a force balance along a theoretical longitudinal slice down the centre of the tube, and another along a theoretical slice across the tube, and see what happens.

If that's OK, then do a hydraulic test to the original test pressure when the exchanger was new.

If that's OK, then the exchanger is fit for service at the rated operating pressure.

If the exchanger is a coded pressure vessel, then discuss the situation with the engineer/surveyor for the company responsible for providing burst indemnity insurance before carrying out any tests, so that this individual can witness them. Record the test results in the General Register at the facility.

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