Autopipe New User Tips 12
Autopipe New User Tips 12
Autopipe New User Tips 12
Segment B
as new
branch
Segment A as one
segment through
Tee header
Pipe Identifiers
A segment can be made up of multiple pipe identifiers where a pipe identifier
contains all the properties of the pipe i.e. pipe size, schedule, insulation, material
etc. Therefore to change a property e.g. pipe materials use Modify/properties of
pipe identifier. To define completely different properties of a section of the model
e.g. new pipe size, use Select /Range (selected points = highlighted RED) then use
Modify/pipe properties over range, an existing pipe identifier can be selected from
the drop-down list or ENTER a new 8 character name.
Symbols
Units
Units for every applicable field are displayed in bottom right hand corner of screen
when the cursor is in the field.
Flanges
In AutoPIPE, Flanges are a 1 point element with no length i.e. considers only the
flange weight and type of weld connection to pipe for SIF calculation. Yes,
assuming flange stiffness is same as the pipe is technically incorrect because a
flange is more rigid than pipe, but no, it doesnt affect analysis results to any
significant extent in most cases. Cases you may wish to model the rigid length of
the flange would be in a short stiff piping arrangement or close to equipment like
pumps. If you want to input flange length, insert a pipe run and insert flanges at
the mating point then select this short length and use Insert > Rigid options
over Range (Include Weight = off, Include Thermal Expansion = offpipe will be
shown purple). AutoPIPEs flange screen has option to do ANSI flange loading
check.
Zoom
The fastest way to zoom is to create a box window by holding down left mouse key
and dragging over the area to be zoomed, then right mouse click once to zoom.
This is way faster than having to click on the zoom icon each time. Note: Use
dynamic zoom by right mouse click once to change the cursor from Pan (hand) to
Zoom (magnifying glass) to Rotate. Also use the mouse scroll wheel for fast
dynamic zoom on the mouse cursor.
Note: Also Zoom topic above. Like CAD - 4 or 2 or 1 viewport can have different
zoom settings which are saved when the model is closed. So when model is
opened again - screen settings are at the same location as when the session was
closed.
Guide Support
A guide support in AutoPIPE is different than Caesars guide element its equal to
Caesars 2 supports (guide and Y stop). In AutoPIPE, a guide supports the pipe in
the vertical and lateral directions but not axial. Users can input gaps to remove
vertical support or other directions if required. A guide support in AutoPIPE is
always normal to the local pipe axis, so if the pipe is rotated the guide stays
normal to the pipe which is very useful also when guides on skewed pipe. Note:
Large gap will not display the support symbol in that direction for convenience.
Navigating
For navigating on the graphics model i.e. go from point to point, use mouse click
or left/right arrow keys to navigate along the pipe. Arrow keys are often faster
than mouse clicking. For dialogue screens, use tab key, Shift Tab to go back, or
mouse click to go to desired field. To close a dialogue, its usually faster to press
the Enter key instead of mouse clicking the OK box.
Selection Sets
Not available in other Pipe Stress programs, just as with Microsoft Word or other
windows applications, users first select what needs to be modified, then they
modify it same with AutoPIPE. With AutoPIPE, there a number of ways to select
ranges: click on one end, then hold shift key down and click on the other end.
Also, there is an icon to select by segment and users can go under Select menu to
select by component if desired (for example, select only flange points, or flex
joints). In addition, the user can select single points using the Ctrl key. Selection
sets can also be used for inserting or deleting across ranges of points or
components.
Wind Loads
When specifying elevations wind load profile, remember to check ground elevation
is correctly defined on the main Wind screen. This applies also to wind loadings to
ASCE-7 and UBC. Opening older models a warning message negative elevations
found may indicate an incorrect wind loading across this model.
+ T1 + D1
+ T2 + D2
+ T1 + D1 +
AutoPIPE
Gr + Max P{1}
GP1T1
GP2T2
GP1T1E1
Stress
Sustain
-
+ T1 + D1 +
GP1T1W1
Occ Loads
Amb to T1
Expansion
T1
Expansion
T2
Expansion
T1 to T2
Max
Range
Occ E1
Occ Win 1
L7
L3 L1
Amb to T2
L8
L3 L2 or L7 L6
T1 to T2
L9
Max Range
L10
L11
L12
L13
L4
L5
L1
L1
E1
Win 1
Sus + E1{1}
Sus + Win 1{1}
L2
L2
+ L10
+ L11
To obtain nonlinear analysis in Caesar II, you have to always create a load
case operating, then operating + wind or + earthquake, then subtract the
operating + wind or + earthquake from the operating case. Then this
occasional load will be added to the sustained stresses and be compared to
1.33 Sh in the case of ASME B31.3.
In the load case editor, you can define the type of loading. To notice that
the basic allowable stresses taken are set by the stress type:
SUS Sustained stress against Sh
EXP Expansion stress against SA=f (1.25 Sc+0.25 Sh) when the liberal
stress is not activated. Otherwise SA=f (1.25Sc+0.25Sh) + (Sh-SL) when the
liberal stress is activated.
It is important to notice that first the basic loading cases are defined, then
their combinations
It is always possible to save the loading cases to be able to reuse it on
other input.
In the load case options , you can define the output status: which allows
you to specify whether or not you will be able to check the loading case.
the output type: to define on which level your combination is going to be
(at diplacement/force/stress or at Disp/force or Disp/stress or force/stress
or disp or force or stress).
the combination method: Algebraic, Scalar, SRSS, Abs, Max, Min,
SignMax, SingMin
The snubbers:active or not active
The hanger stiffness: Rigid, Ignor, as design
The elastic Modulus: Ec or Eh
The friction multiplier: to turn on (1) or off (0) the friction
With our example having 4 load cases in Static earthquake and 4 wind
directions, we end up having already 36 load cases defined with the friction
on. As the friction is not always acting, we should do the same load cases
without friction.
CAESAR II loading has become quite complicated.
For the wind load, we define the wind pressure per elevation or use other
codes.
For more complicated load sequences uncheck the Use Default Sequence box to
modify the Load sequence and Enter or click OK. See following screen shot:
the overall length of the system. This capability if very useful for sliding
supports, valves, control station assemblies, expansion joint assemblies, frame
assemblies from one position to another. Another good use is for pipe rack piping,
copy/paste one line and offset from existing line then any changes in any direction
can be made using Edit > Move /Stretch command.
Copy the segment then paste using the offset options shown below either from
origin or from any other selected frame or piping point in the model.
Select Range below and DY = -2. It is done 2 parallel pipelines routed using
copy/paste and move commands
Insert a segment offset from any point or Origin, useful for building new branch
pipeline or another pipe on a rack.
Insert Run DX = 4
Hint: Sign Max and Res Max (Resultant Maximum) are 2 common methods to
evaluating maximums from other load cases or combinations. Other methods used
are Min and Max.
Save and Reuse Common Piping and Support Configurations between Jobs
Use AutoPIPEs graphical copy/paste capabilities to store commonly used pipe
configurations (pump stations for different services, for example, or common
vessel configurations) or complicated expansion joints or commonly used support
structures using AutoPIPEs beam/frame elements. Just copy & paste from one job
to another.
Note: The models must be in the same directory. Open 2 side by side sessions of
AutoPIPE then copy/paste from one model to the other OR into the same model.
This is one of the most powerful features in AutoPIPE
Define all the pipe identifiers for a project for the different pipe sizes, insulation,
corrosion and material in one template model then use this to start a new model
using already the already pre-defined pipe properties. Do not have to redefine
these pipe properties again saving time and mistakes.
Using Copy/paste + Move command are powerful tools to template and recreate
similar identical plant configurations from one project to the next.
Input Grids
Very powerful for reviewing the data and making global changes to the input grid
e.g. select multiple cells or complete column to change support friction, enter the
value = 0.3 then press CTRL + Enter. Notice grayed out cells are not updated.
Note: All Grids are dynamically synchronized bi-directionally with the graphic plot.
Select a cell or group of cells and make a change immediately see the change on
the plot and vice versa. If click on a component on the plot this will place the
arrow cursor on the row in the current grid.
To make global changes on cells with drop-down lists e.g. support type first select
all cells then hold CTRL key and click on any of the cells to select the new item
then CTRL + Enter to apply to all selected cells.
Note: Multiple cells can be changed across different columns provided it is likedata e.g. all support gaps or all offsets.
Hint: To try to different support configurations e.g. try 3 springs instead of Vstop's
as shown below. Select the supports in the Grid then hold the CTRL key down and
select spring from the drop down list for one cell in the range then press Enter.
Like Excel select columns then right click to hide or unhide them
Sorting: Double click the header of any column (cursor shown as downward
arrow); to sort the data into logical groups e.g. support types. To restore the
default sort order double click on the top leftmost cell.
Hint: This is very useful to find mistakes in the data e.g. incorrect support type,
friction or gaps.
Modify: To modify a component data through the dialog double-click the row for
the component.
Delete: To delete a component click on the row and press the Delete key or click
on the Delete toolbar icon
Selecting: Selecting cells or rows in any grid will Select /highlight those
components on the graphic plot which can provide an accurate method of selecting
components compared to graphical point and click method. This also enables
multiple random selections made by first holding the CTRL key down and mouse
selecting the rows or cells same as MS Excel.
Zooming the Grid: Any grid can be zoomed In or Out by holding the CTRL key
and pushing the mouse scroll wheel forward or backward.
Mouse Right-Click menu: Useful functions like undo/redo, selecting All/Clear,
copy/paste and custom printing available.
Other productive features of Excel-like Grids
Printing any grid to one page, other options to customize the header and footer
with model and company information
Alternatively make the beams transparent (However while good for viewing the
beams can still accidentally be selected when modifying the piping)
Hint: The DX, DY, or DZ offsets can be read or copy/pasted to Excel or text file
Hint: Useful for evaluating in-line pump nozzles and manufacturer stated limits on
vessels or equipment.
Switch between Single / Double or Quad viewports to easily work in a view which
is convenient then switch back to single view. Viewports are available for editing
the model AND viewing results e.g. code stresses in plan, iso and elevation views
as below
Segment A
as Header
Segment B
as Branch
Compare Spreadsheets
Caesar
AutoPIPE
AutoPIPE
Make Global changes to pressure, temperature. Option A is best for performing
global changes across the whole model. Option C allows best method to check all
values being changed point by point.
Option A Modify > Operating Load by Value, Select the existing temperature
and enter the replacement value. This will replace all temperatures = 482 with 555
in the whole model
AutoPIPE
Note: Double click cell 1 here to
restore sort order
Pipe Identifier
Building Structures
Insert > Section Properties, select the steel sections from the libraries to be
used in the model called Section IDs
Insert > Frame, to insert a new beam into the model. Note: Beam assemblies
can be copy/pasted into the model (connected or unconnected)useful for
independent pipe rack portal frames.