ISO13445-3 Nozzle with reinforcing ring calculation

[amm_naser]

Hi,
I'm doing the check calculation per ISO 13445-3 for the reinforcing ring of the nozzle, and I'm having issues calculating the maximum lengths l0 of ring and the average thickness eam.

Firstly, there is an error in formula 9.5-47:
l0 = lr + (l0 - lr) - this makes no sense

But the l0 and eam are connected via 9.5-46 and 9.5-48, and this is not possible to calculate, or am I missing something?

Does anybody have the slightest idea how to calculate these values?

Thanks in advance!

 

[DriveMeNuts]

Well, I spent two seconds looking at the page and spotted the words "by iterative calculation".

 

[XL83NL]

There’s no ISO 13445. I assume you mean EN 13445.

Huub
- You never get what you expect, you only get what you inspect.