To see a detailed drawing of the nozzle with indicted dimensions, generate a complete output report and open the "Isolated Opening" section. At the start of this section of the report is a number of Figures corresponding to a Figure number. Scroll further down to a particulare nozzle to see the referenced Figure number.
- Example:
- What is the figure number for Isolated opening B1?
- Answer: Fig 1
Detailed information on Isolated Opening variables and how are they calculated:
Note, user should be familiar with code EN 13445, Figures 9.7-1 to 9.7-11. The equations of many variables will be based on the figure referenced above.
| Variable |
General Information |
Calculation Details |
|---|---|---|
| ls | Length of shell, from the edge of an opening or from the external diameter of a nozzle, to a shell discontinuity |
From example above, Is = 159 mm (more to come) |
| lb |
Length of nozzle extending outside the shell., Or, the nozzle neck length considering the nozzle external projection plus the height due to the nozzle offset that increase the real length along nozzle neck axis.
Notes: Do not confuse "distance to a discontinuity" with "length available for reinforcement". The code gives theoretical lengths for reinforcements (lbo and lso) that can be reduced by proximity to a discontinuity and/or another length of reinforcement, because one length of reinforcement cannot interfere with another length of reinforcement.
"lb" and "ls" are the remaining reinforcement lengths available taking into account all these constraints, they cannot be represented on a Figure.
|
From example above, Ib = 15.53 mm Nozzle neck (ex. B1) has Shell discontinuity (ex. nozzle B10): Therefore, Notes: The subscript "s" refers to the shell, the subscript "b" refers to the Nozzle.
But in this case, we have a Nozzle (B10) on a Nozzle (B1), so when considering B10, B1 is the shell !
You have to see the calculation of B10 to understand the calculation of B1.
The length of reinforcement on the "shell" took for B10 will reduce the available length on the Nozzle for "B1".
This is what is being shown in drawing above.
|
| w |
Distance between an opening and a shell discontinuity |
From example above, W= 159 mm. (more to come) |
Definitions:
- Set-in nozzle - nozzle which passes through the shell and is welded to it on the inside and outside of the shell (see Figure 9.4-8)
- Set-on nozzle - nozzle which is welded only to the outside of the shell (see Figure 9.4-7)
- Shell - cylinder, sphere, cone or dished end
- Shell discontinuity - junction between any two of the following: cylinder, cylinder on a different axis, cone, dished head, spherical end, flange or flat head
- Small opening - isolated opening which satisfies the condition of Equation (9.5-18)