new tips and tricks mod
TRANSCRIPT
PV Elite Tips and trick – how to…
Some of little things you might not know
The order the vessel is built
The order the vessel is built
Overview:
Set the nozzles to be computed to the MAWP (I’ll
show you how to do this)
Built for internal pressure only (no vacuum) – only the
shell and heads
Check all the thickness are adequate
Install the operating liquid
Now set the external (vacuum) pressure
Install vacuum rings or thicken components
Install any nozzles
Now to see this strategy in action 2
Start with Design Constraints
Fill in everything
except the external
pressure
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Build the vessel to completion
Check all the thickness are Ok
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Now enter the operating liquid
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Enter the External pressure – back
the Design Constraints screen
The external
pressure here
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Now add vacuum rings or thicken
Here is the maximum
distance between the rings
Or we could make the shell
thicker – we have a choice
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Now add the nozzles
We have now completed
the vessel
But, we now look closer
at the nozzle calculation
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The vessel has an MAWP - here
MAWP 326.677 psi
Design pressure 100 psi
What about the nozzle pressure ?
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This is the nozzle calculation
Design pressure 100 psi
Vessel MAWP is 326 psi
The Nozzle could limit the MAWP
of the vessel if it cannot take that
pressure
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Let us look at the Load Cases tab
This is the problem – nozzle pressure based on Design Pressure
However there are four choices for the nozzle design pressure
We can examine each choice in turn
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Nozzle Design Pressure Options
Liquid level
MAWP is here
Vessel MAWP is not computed for the nozzle
MAWP is here
MAWP is here
If we use the vessel MAWP for the nozzle,
then the nozzle will not control the MAWP of
the overall vessel
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Can move the nozzle physically
Liquid level
Click this button
Now click on
the nozzle
It turns Yellow Now you can click on the nozzle and move it
You can gain complete control over the nozzle
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Can move the nozzle physically
Liquid level
Now click on
the nozzle
Click this button
Now you can click on the nozzle and move it
You can gain complete control over the nozzle
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Can move the nozzle physically
Liquid level
Click this button
Now you can click on the nozzle and move it
You can gain complete control over the nozzle
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The ‘List Dialog’ is very useful with
nozzle problems
The list dialog allows you to do a lot of things to modify a vessel,
especially with nozzle problems
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The ‘List Dialog’ is very useful with
nozzle problems
Suppose you have install many nozzles in an Elliptical head like this
But, this should have been a Torispherical head
You change the head to Torispherical, however,
this is what happens
All those nozzle have disappeared !
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The ‘List Dialog’ is very useful with
nozzle problems
All those nozzle have disappeared !
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The ‘List Dialog’ is very useful with
nozzle problems
This List Dialog comes to your rescue – if you knew about before changing
the head
In the List Dialog screen select all the nozzle and press <Ctl>+C to save them
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The ‘List Dialog’ is very useful with
nozzle problems
This List Dialog comes to your rescue – if you knew about before changing
the head
Change the head from Elliptical to Torispherical
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The ‘List Dialog’ is very useful with
nozzle problems
This List Dialog comes to your rescue – if you knew about before changing
the head
Change the head from Elliptical to Torispherical
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The ‘List Dialog’ is very useful with
nozzle problems
Open the List Dialog again, and add a new row
Put your mouse cursor here, and press <Ctl>+V
and your nozzle are retuned
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The ‘List Dialog’ is very useful with
nozzle problems
Here are the restored nozzles
The ‘List Dialog’ can be used to
add nozzles
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The ‘List Dialog’ can be used to
add nozzles
Suppose you wanted to copy a nozzle from one location to another
From here
To here
Use the List Dialog again to accomplish this
Add a row to make room for the new nozzle
Select the first row (click on tab 1)
Press <Ctl>+C to copy it
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The ‘List Dialog’ can be used to
add nozzles
Put cursor in row 2. Now press <Ctl>+v to add the new nozzle in row 2
From here
To here
A new nozzle is added, but with identical information.
Change the name and any other details.
Here is the nozzle you copied.
Put cursor in row 2. Now press <Ctl>+v to add the new nozzle in row 2
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The ‘List Dialog’ can be used for
other things as well
You can:
Copy, change and delete vacuum rings
Copy change and delete platforms
Move any item that is attached to the vessel
Copy whole bunches of stuff at once
There is one more thing we have to look at before we leave List Dialog
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Changing from Imperial to Metric –
nozzle problems
All the dimensions are in mm except the nozzle diameter
The diameter should be in mm, not inches
We enlist the services of the List Dialog again to put matters straight
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Now consider the effects of wind
It is important how we build a vertical tower
This is the wind speed profile. Altitude versus Wind Speed
Like this Or like this Wind speed
Alt
itu
de
These are the forces from the wind
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Now consider the effects of wind
The vessel on the left would need a thick shell at the bottom, and a thin
shell at the top. This is a more economical design
Like this Or like this Wind speed
Alt
itu
de
The vessel on the right would need a thick shell the whole length
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Put PV Elite on automatic drive
PV Elite can automatically check the vessel for code required components
We find this using the Design Constraints tab
For example, use this little button
However, use these functions only if you know what you are doing
Your vessel can go where you do not want it to go !
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The value of the Status Line
Effective length for external pressure
Maximum external pressure
Element 2 of 3 elements
From and to the Datum Line
Component facing Up or Down
Required thickness for internal pressure
MAWP if this component
MAWP new and cold if this component
Required thickness for external pressure 31
The value of the Status Line
Whenever you see anything in red, you have a failure
Watch the status line all the time – it can save you hours of work
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Getting a quick sketch of the vessel
Click in the 2D screen
Click File on the menu line, choose Print Preview
Click on Print Preview
This is a sketch you can send to the printer
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Getting a quick sketch of the vessel
This is a sketch you can send to the printer
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You can send a 3D image to anyone
Even if that someone does not have PV Elite – it goes to a web browser
Right click on the 3D screen – then click on Save 3D Model as HTML
This message tells you where it is stored and the name
You can find it in Windows Explorer
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You can send a 3D image to anyone
You can find it in Windows Explorer
Send these three files to anyone
When they double click on xxxx.html (your file name) they will be invited
to download and install this application:
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You can send a 3D image to anyone
They will then get this image in their browser which can be orbited
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Installing a nozzle on a nozzle
First install the parent nozzle N1
Click Add New Nozzle
Now install the daughter nozzle
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Installing a nozzle on a nozzle
Now install the daughter nozzle
Nozzle size
Click nozzle on
nozzle box
Select the parent
nozzle
Set all the other data – look at your model
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Installing a sump or boot
Install this nozzle in the normal way
Now, just add a head to your model
Look near the bottom of your input screen
Click this box as we want
a sump head
Select the nozzle to attach
the sump head
If your head is inverted, click the Flip icon
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Changing the vessel globally
Suppose wanted to change the material for every component
First, select the first element whose characteristic you need to change
click on the
appropriate
element
Click on the share icon
On the selected element change something (eg Material)
This is the share screen
Click the characteristic
The data is copied from-to
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Changing the vessel globally –
nozzles too
The nozzle data can also be changed globally
Click this button
This screen appears
You can select material and
other nozzle details
And exclude nozzles from change 42
We can visually see if nozzles
interfere
In the 3D screen, press the right mouse button to get this drop down menu
Click visibility
This screen appears
Click Diameter Limits
Now you can see the
diameter limits
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Suppose you wanted to find a
nozzle on a complicated vessel
This vessel has 84 nozzle, we need to find one of them
This screen appears
Click on the nozzle you wish to see
Click on this icon (bottom right corner of input screen)
Click Highlight Nozzle….
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Suppose you wanted to find a
nozzle on a complicated vessel
Click Highlight Nozzle….
Here is the nozzle – found for you
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Nozzle orientation
Where is the zero point, and do we go clockwise or counter clockwise ?
North
South
East West
Is it like this ?
180O
0O
90O 270O
North
South
East West 180O 0O
90O
270O
Or is it like this ?
PV Elite allows you to choose the Datum and Direction
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Nozzle orientation
Call up the Configuration dialog screen and click on the last tab
This where you can orientate all your nozzles as you wish
This works for nozzles, platforms and anything attached to the shell
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Transporting a vertical vessel
Call up the Configuration dialog screen and click on the last tab
Click on Tools, then click on Flip Model Orientation
Click Flip the Model Now
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Transporting a vertical vessel
Call up the Configuration dialog screen and click on the last tab
Click on Tools, then click on Flip Model Orientation
Click Flip the Model Now
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Transporting a vertical vessel
Call up the Configuration dialog screen and click on the last tab
Click on Tools, then click on Flip Model Orientation
Click Flip the Model Now
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Transporting a vertical vessel
Call up the Configuration dialog screen and click on the last tab
Now you can install transport saddles
Note: The skirt is now a cylinder and the base ring is gone
You can flip vertical again, but the bottom must be turned
back into a skirt
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Making the 3D model transparent
Click on the Transparency Icon here
Your model is now transparent
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We can also section the model
Click on the Insert Cutting plane icon
We now see the model insides exposed by the cutting plane
This is useful to check any alignment
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The U-1 Form
Pressure vessels are registered by the Nation Board on Inspectors
This is done by submitting a standard form – the U-1 form
This is how get PV Elite to fill in most of the information
Run the output processor (get the calculations)
On tool bar press this icon
Now you see the blank form
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The U-1 Form
Press this command button to import the information
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The U-1 Form
This information is entered from within PV Elite
The U-1 Form – entering Co. Data
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The U-1 Form – entering Co. Data
Go to Tools and then ASME Form Information
This is the data entry screen
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The U-1 Form – entering Co. Data
Go to Tools and then ASME Form Information
This is the data entry screen
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Changing the unit (Metric / Imperial)
Changing Units is simplicity itself
This is the units field on the PV Elite main screen
You can choose any set of unit you wish, and change back again
What happens if the units you want are not there ? No problem….
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Changing the unit (Metric / Imperial)
Changing Units is simplicity itself
This is the units field on the PV Elite main screen
You can choose any set of unit you wish, and change back again
What happens if the units you want are not there ? No problem….
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Setting up your own units file
Go to Tools, Create/Review Units…
You get the Units editor screen
Select a file you would like to modify, or start from scratch
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Enter the name of the unit you would like here or use drop down menu
Enter the conversion factor for you new unit here
When are through with your units, save you file with a unique name
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There is also a Units Calculator in
PV Elite
Go to Tools, Units Conversion Viewer
This units calculator is now available to you
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Code Case 2695
In 2012, ASME issued a new exciting code case, which allows ASME Section
VIII, Division 1 vessels to be analysed in accordance with Division 2
The only proviso is that Division 1 stress values be used
What are the advantages:
Heads can be thinner
Nozzle re-pads can be smaller
Vacuum conditions may produce thinner shells
Saving in welding consumables
Lighter manipulating and transport weights
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Code Case 2695
Here is the new feature in PV Elite
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Code Case 2695
Here is the new feature in PV Elite
Thank you for your attention
Are there any questions ?
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