AUTOPIPE / CAESAR TRANSLATION
CONTENTS
AutoPIPE / Caesar Translation........................................................ 1
Caesar Neutral File Versions .......................................................... 2
Transfering Caesar Model to AutoPIPE............................................. 3
Transfer Large Caesar Models ........................................................ 9
AutoPIPE Configurable Mapping.................................................... 11
Translation Limitations ................................................................ 14
Comparative Results ................................................................... 15
Write AutoPIPE Model to Caesar ................................................... 18
Page | 1
CAESAR NEUTRAL FILE VERSIONS
Confirm Version of AutoPIPE (Help> About) and version of CAESAR file
that can be imported.
Page | 2
TRANSFERING CAESAR MODEL TO AUTOPIPE
Generating Caesar cii file in Caesar v5.0 to v5.3
Open Caesar and go to the Tools menu
Page | 3
Convert Caesar *.C2 (v5) or
*._a (pre v5) Caesar file to
cii
Click Browse button to
open dialog below to
select the Caesar input
file (*.C2 or *._a)
Page | 4
Note: The following error may occur when a CAESAR *.CII file is opened in AutoPIPE:
forrtrl: severe (64) - Input conversion error
Older builds of CAESAR 5.3 have an issue with $CONTROL section - where location of
a variable was incorrect. This is a known issue - that is also mentioned in release notes of
CAESAR. Install latest SP2 of CAESAR 5.3 before exporting CII file.
Page | 5
In AutoPIPE
V8i v.9.4 and higher: File > Import> Caesar (*.cii), Select the cii file
V8i v.9.3 and lower: File > Open > Caesar (*.cii), Select the cii file
AutoPIPE V9.2 or later
Select the AutoPIPE input working units
Page | 6
AutoPIPE Pre-V9.0
The matching Caesar Units file must be selected
Autopipe Units can be any
from drop down list.
Caesar units file is *.c2u
which must match the units
at the bottom of the cii file
Caesar units file is
SIMM.c2u matches
the units at the
bottom of the cii file
Page | 7
The model opens in AutoPIPE
Page | 8
TRANSFER LARGE CAESAR MODELS
Page | 9
AutoPIPE
Page | 10
AUTOPIPE CONFIGURABLE MAPPING
CIIMAP File in AutoPIPE program folder
Piping Code
Material
Supports
Force Moments, Displacements, Uniform Loads and Cut Short
Tees
Hanger Design Code
Convert Caesar RIGID Elements
RIGID Stiffness
Default Flange length
Caesar Node Names
Writing Y support
Default EXEC Options
Part copy of CIIMAP file below:
////////////////////////////////////////////////////////////////////////
/// Mapping of components between Caesar II and AutoPIPE.
///
/// Note that this file is not free format.
/// is fixed (rows and columns).
Format of each section
Items outside these sections are
/// not read.
////////////////////////////////////////////////////////////////////////
/// Import (CII -> AP)
/// Piping code mapping.
Leave unsupported codes as blank.
Maximum 30
/// Piping code is selected based on the first allowable auxilary data
///
/// Col 1: CII piping code number
/// Col 2: AutoPIPE piping code designator
/// Col 3: AutoPIPE piping code number (IRCODE)
/// (2x,i5,1x,a5,1x,i5)
////////////////////////////////////////////////////////////////////////
Page | 11
#$ IMPCODE
1 B31.1
// not used
3 B31.3
4 B31.4
// B31.5 - not available in AutoPIPE
// not used
// not used
8 B31.8
9 O31.8
// B31.8 Offshore
10
// not used
////////////////////////////////////////////////////////////////////////
/// Import (CII -> AP)
/// Load case mapping (20 cases).
Displacement, Forces and Moments
/// and uniform loads defined in auxiallary screens are applied to
/// load cases defined below.
///
/// Col 1: Load case
/// (2x,3(a3,1x))
////////////////////////////////////////////////////////////////////////
#$ IMPLDCASE
U1
U2
U3
U4
U5
U6
U7
U8
U9
// Forces and Moments
T1
T2
T3
T4
T5
T6
T7
T8
T9
// Displacement
U1
U2
U3
GR
// Uniform loads
// Cut short - single load case
Page | 12
Note: Typically in Caesar up to 9 displacements are combined with thermal
loadings in the Caesar analysis module. Hence these are defined T1 to T9 in the
CIIMAP file. But these can be changed to any AutoPIPE load case e.g. first 6 cases
maybe thermal and last 3 cases may be seismic E1 to E3 as below.
All displacements are imported as XTRA data > imposed displacements and not as
thermal anchor movements
////////////////////////////////////////////////////////////////////////
#$ IMPLDCASE
U1
U2
U3
U4
U5
U6
U7
U8
U9
// Forces and Moments
T1
T2
T3
T4
T5
T6
T7
T8
T9
// Displacement
U1
U2
U3
// Uniform loads
GR
// Cut short - single load case
////////////////////////////////////////////////////////////////////////
#$ IMPLDCASE
U1
U2
U3
U4
U5
U6
U7
U8
U9
// Forces and Moments
T1
T2
T3
T4
T5
T6
E1
E2
E3
// Displacement
U1
U2
U3
GR
// Uniform loads
// Cut short - single load case
Page | 13
TRANSLATION LIMITATIONS
Caesar neutral file format (*.cii) does not support the following:
Load combinations
Beams
Hydrodynamic data
Point Static Earthquake Factor
User Nozzle Flexibility
User Weld Efficiency
Flanges not supported in Caesar mapped to RIGID Options or
Valve
Soil Spring data
Wind loading data
Only 9 displacements in Caesar
Only 3 seismic cases (UDL g) in Caesar
Page | 14
COMPARATIVE RESULTS
Sample Model has comparative Non-Linear Thermal Results within 6%.
AutoPIPE has more advanced non-linear analysis engine with load
sequencing and expect more accurate non-linear results than Caesar.
Input Data
Piping Code = B31.3 : 2006
Pipe OD = 1370.0000
Allow Stress = 150 N/mm2
Wall Thickness = 10.000
Bend Radius = 1370 (bend 70 = 2055), close
miters
Material : Carbon Steel
Support friction = 0.3
Temp = 200C, Press = 0.25 N/mm2
2 Valves at nodes 252, 263
Caesar
Page | 15
AutoPIPE
Thermal Displacement Results
Page | 16
Page | 17
WRITE AUTOPIPE MODEL TO CAESAR
Geometry, Pipe Sizes, Supports, Materials, Tees, SIFs, Nozzles, RIGIDS,
Valves, Flanges,Reducers, Expansion Joints, Support Tags, Pressure/
Temperatures, Seismic, displacements, Force/moments, Cut Short etc
AutoPIPE V8i 9.2 and lower
File> Save As> CAESAR (*.cii)
AutoPIPE V8i 9.3 and Higher
File> Export> CAESAR (*.cii)
Page | 18
Tools > External Interfaces > Caesar II Neutral File
Convert Neutral file to Caesar Input file
Page | 19
Page | 20
Page | 21
Caesar Tee / Hanger Data
AutoPIPE Tee / Hanger Data
Page | 22
