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Material is 316 SS and needs to stay as is (GMP reasons, etc)

Hi, I have the quote from a fabricator to replace the entire unit, which is what we'll end up doing. I was just trying to find how much the resizing will affect our operation, but from everything I've done (and other engineers) all seems fine. Thanks everyone for your help, Rob

We've got a shell and tube HX which has ruptured - have found cracking in a number of the tubes. When sent away for repair the guy doing the repair said he would never have made the tubes so thin (1.2mm) and would go 1.6mm as a minimum. Nothing more technical than that I'm afraid!

Lovely, thank you. Found it in my old notes too, feel a bit of a dunce for not remembering...

Thanks for both your replies, after a lot more thinking that is what I started get to as well. Going to head home and dig through old uni notes, I'm sure I can remember doing some equations on inside and outside coefficients sometime...

Hi All, I'm replacing a tube bundle in shell and tube exchanger which has cracked with a new, slightly thicker one. The old tubes were 1.2mm thick, new 1.6mm. I'm wondering (and can't seem to find anywhere) how much this will affect heat transfer. Looking at Fourier's Law for conductive heat...

You can tell it was a Monday when I put it together... Apart from that I think I've got it all sorted now. Thank you!

I think I've found my answer, I've used bar instead of kPa, bit of a dumb morning there...!

Hi, I've just been doing some bursting disc calculations and seem to be getting different answers depending on whether I use API520 (2008 edition) or BS2519:1990. The value I'm getting with API is around 10-20 times greater than the BS one (there is the factor of 17.9 which would appear to be...