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undergrad_mech
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EN 13480-3 Calculating the Wall Thickness of a Reducer

03/21/2014 10:30 AM

I am trying to calculate the minimum thickness of a conical reducer (econ) according to EN13480-3 which is equation 6.4.4-1 which states econ = (pc x De)/(2f z-P) x 1/cos alpha, however from what I can see it does not state what the variable P is. Does anybody know what the variable P is ?
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JohnDG
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#1

Re: EN 13480-3 Calculating the wall thickness of a reducer

03/21/2014 10:43 AM

Pressure. Exactly which pressure, I've no idea.

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undergrad_mech
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#2
In reply to #1

Re: EN 13480-3 Calculating the wall thickness of a reducer

03/21/2014 10:49 AM

I presumed it was Pressure alright but as you said I have no idea which pressure it is. Do you know if you multiply to 2f by z - P on the bottom line ?
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JohnDG
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#3
In reply to #2

Re: EN 13480-3 Calculating the wall thickness of a reducer

03/21/2014 10:59 AM

Sorry, can't tell. These are some of the most ambiguous equations I've ever seen!

For the benefit of others:

I assume it's (PDi/2f(z-P))x(1/cosα), but your guess is as good as mine!

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undergrad_mech
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#4
In reply to #3

Re: EN 13480-3 Calculating the wall thickness of a reducer

03/21/2014 11:22 AM

I have the 2013 edition and it is slightly different to the equation that you just posted. It has pc on the top line which is calculated pressure and then just P on the bottom line, it is P which I don't know.
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