New Tips and Tricks Mod

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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Liquid level

Now click on

the nozzle

Click this button

Now you can click on the nozzle and move it


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Liquid level

Click this button

Now you can click on the nozzle and move it


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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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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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nozzle problems

All those nozzle have disappeared !

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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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nozzle problems


the head

Change the head from Elliptical to Torispherical

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nozzle problems


the head

Change the head from Elliptical to Torispherical

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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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nozzle problems

Here are the restored nozzles

The ‘List Dialog’ can be used to

add nozzles

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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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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 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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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


Click on Tools, then click on Flip Model Orientation

Click Flip the Model Now

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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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Go to Tools and then ASME Form Information

This is the data entry screen

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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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New Tips and Tricks Mod

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