definition of 'unsupported tube length' in TEMA
definition of 'unsupported tube length' in TEMA
(OP)
Hi ya, can anybody define the term 'unsupported tube length' in TEMA code? according to TEMA, its mean the span tube length between central baffles, but if one have the segmentel baffles, eg baffle#1, baffle#2. can we define it as the span length between baffle#1 and baffle #2 instead of baffle #1 to baffle#1 in order to reduce the baffle plate thickness. mean while is there any method to calculate the baffle plate thikness instead of table RCB4.41 shown in TEMA. any answer for this will be nice.





RE: definition of 'unsupported tube length' in TEMA
There is no method to calculate , the load is very low. If you are allowed to deviate from the TEMA , it is adviced to make the baffle at least two times the shell-side corrosion allowance.
RE: definition of 'unsupported tube length' in TEMA
RE: definition of 'unsupported tube length' in TEMA
I think the key words are "if you are allowed to deviate from TEMA". Just because you don't want to follow a code or regulation doesn't mean you're allowed to deviate from it.
Is there some key factor that is driving you to need a thinner baffle plate?
Patricia Lougheed
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RE: definition of 'unsupported tube length' in TEMA
ksqurare, I can't prove it, but the practice of making the baffles 2X the shell CA would seem to insure that the baffles do not disappear before the shell has reached the end of its useful life.
You want to make the baffles thinner, use high alloy or non-ferrous.
Regards,
Mike
RE: definition of 'unsupported tube length' in TEMA
RE: definition of 'unsupported tube length' in TEMA
If the baffles are corroded away, the thermal efficiency will be affected.