Hi,

The code stress summery is as below.
Highest Stresses: (MPa )
CodeStress Ratio (%) is 85.2 at Node 10 LOADCASE: 1 (OPE) W+T1+P1+F1
Code Stress: 342.0 Allowable: 401.4
Axial Stress: 157.9 @Node 20 LOADCASE: 3 (OPE) W+T1+P1
Bending Stress: 140.0 @Node 10 LOADCASE: 1 (OPE) W+T1+P1+F1
Torsion Stress: 20.2 @Node 20 LOADCASE: 1 (OPE) W+T1+P1+F1
Hoop Stress: 424.5 @Node 20 LOADCASE: 1 (OPE) W+T1+P1+F1
3D Max Intensity: 342.0 @Node 10 LOADCASE: 1 (OPE) W+T1+P1+F1

Highest code stress ratio is displayed for combined case where allowable is 0.9*446=401.4

My query is

Hoop stress allwable must be 0.72*446=321.12
Then why CAESAR is not recognising the failure in hoop stress.
the highest code stress ratio must be 424.5/321.12=1.32

Can anyone pls advice?
Also Pls Guide how to enclose/attach file here?

For B31.8 VIII, there are three Code Stresses and three Allowable Stresses. CAESAR II computes each of these six values and then determines three ratios (hoop/hoop_allowable, longitudinal/longitudinal_allowable, and combined/combined_allowable). The two values that produce the largest ratio are reported in the "Code Stress" and "Allowable Stress" columns.

In the Summary of the report, the values that produce the maximum ratio are (should be reported).

If you can't resolve this, open a Support Request on SmartSupport (formerly eCustomer) and send in you job file.

Hi I am unable to enclose file.
Hence enclosing file inpu here
Its simple 2 element file used to verify the problem.

From 10 To 20 DX= -290.000 mm.
PIPE
Dia= 323.000 mm. Wall= 36.000 mm. Cor= 3.0000 mm. Mill%(-)=12.50
GENERAL
T1= 149 C P1= 749.0000 bars Mat= (341)A789 S32750 E= 195,836 Mpa
EH1= 186,159 Mpa EH2= 195,836 Mpa EH3= 195,836 Mpa EH4= 195,836 Mpa
EH5= 195,836 Mpa EH6= 195,836 Mpa EH7= 195,836 Mpa EH8= 195,836 Mpa
EH9= 195,836 Mpa v = .292 Pipe Den=8027.1997070 kg./cu.m.
Fluid Den=1150.0000000 kg./cu.m. Insul Thk= .000 mm.
RESTRAINTS
Node 10 ANC
ALLOWABLE STRESSES
B31.8 VIII(2007) Sy= 446 MPa Fac= .7200
-----------------------------------------------------------------------------
From 20 To 30 DX= -100.000 mm.
FORCES & MOMENTS
Node 30 FX1= 200.00 KN. FY1= -50.00 KN. FZ1= 50.00 KN.
MX1= 80.01 KN.m. MY1= 100.02 KN.m. MZ1= 200.04 KN.m. FX2= 200.00 KN.
FY2= -50.00 KN. FZ2= -50.00 KN. MX2= -80.01 KN.m. MY2= -100.02 KN.m.
MZ2= 200.04 KN.m.
ALLOWABLE STRESSES
B31.8 VIII(2007)



MATERIAL Changes:
10 20 Mat= (341)A789 S32750 E= 195,836 Mpa
v = .292 Density= 8,027.1997 kg./cu.m.
JOBNAME: C:\DATA\MOHO NORD\CAESAR\FOR CHECK OF HUB\ASME 31.8...\HUB PIPE-C1 (2)

ALLOWABLE STRESS Changes
10 20 B31.8 VIII(2007) Sy= 446 MPa Fac= .7200
20 30 B31.8 VIII(2007)

RESTRAINTS Len MU
GAP YIELD Dir
NODE TYPE CNODE STIF1 STIF2 FORCE Vectors
-------+-------+------+----------+----------+----------+---------------------
10 ANC .000 .000 .000



FORCES AND MOMENTS
20 30 Node 30 FX1= 200.00 KN. FY1= -50.00 KN.
FZ1= 50.00 KN. MX1= 80.01 KN.m.
MY1= 100.02 KN.m. MZ1= 200.04 KN.m.
FX2= 200.00 KN. FY2= -50.00 KN.
FZ2= -50.00 KN. MX2= -80.01 KN.m.
MY2= -100.02 KN.m. MZ2= 200.04 KN.m.

INPUT UNITS USED...

UNITS= SKULD NOM/SCH INPUT= ON
LENGTH inches x 25.400 = mm.
FORCE pounds x 0.004 = KN.
MASS(dynamics) pounds x 0.454 = kg.
MOMENTS(INPUT) inch-pounds x 0.000 = KN.m.
MOMENTS(OUTPUT) inch-pounds x 0.000 = KN.m.
STRESS lbs./sq.in. x 0.007 = MPa
TEMP. SCALE degrees F. x 0.556 = C
PRESSURE psig x 0.069 = bars
ELASTIC MODULUS lbs./sq.in. x 0.007 = Mpa
PIPE DENSITY lbs./cu.in. x 27680.000 = kg./cu.m.
INSULATION DENS. lbs./cu.in. x 27680.000 = kg./cu.m.
FLUID DENSITY lbs./cu.in. x 27680.000 = kg./cu.m.
TRANSL. STIF lbs./in. x 0.175 = N./mm.
ROTATIONAL STIF in.lb./deg. x 0.113 = N.m./deg
UNIFORM LOAD lb./in. x 0.175 = N./mm.
G LOAD g's x 1.000 = g's
WIND LOAD lbs./sq.in. x 6894.757 = N./sq.m.
ELEVATION inches x 0.025 = m.
COMPOUND LENGTH inches x 25.400 = mm.
DIAMETER inches x 25.400 = mm.
WALL THICKNESS inches x 25.400 = mm.

SETUP FILE PARAMETERS
------------------------------------------------------------------------------
CONNECT GEOMETRY THRU CNODES = YES
MIN ALLOWED BEND ANGLE = 0.100000
MAX ALLOWED BEND ANGLE = 95.0000
BEND LENGTH ATTACHMENT PERCENT = 1.00000
MIN ANGLE TO ADJACENT BEND PT = 0.500000
LOOP CLOSURE TOLERANCE = 25.4000 mm.
THERMAL BOWING HORZ TOLERANCE = 0.100000E-03
AUTO NODE NUMBER INCREMENT= 10.0000
Z AXIS UP= NO
USE PRESSURE STIFFENING = DEFAULT
ALPHA TOLERANCE = 0.500000E-01
RESLD-FORCE = NO
HGR DEF RESWGT STIF = 0.175120E+12 N./mm.
DECOMP SNG TOL = 0.100000E+11
BEND AXIAL SHAPE = YES
FRICT STIF = 175120. N./mm.
FRICT NORM FORCE VAR = 0.150000
FRICT ANGLE VAR = 15.0000
FRICT SLIDE MULT = 1.00000
ROD TOLERANCE = 1.00000
ROD INC = 2.00000
INCORE NUMERICAL CHECK = NO
OUTCORE NUMERICAL CHECK = NO
DEFAULT TRANS RESTRAINT STIFF= 0.175120E+12 N./mm.
DEFAULT ROT RESTRAINT STIFF= 0.112980E+12 N.m./deg
IGNORE SPRING HANGER STIFFNESS = NO
MISSING MASS ZPA = EXTRACTED
MIN WALL MILL TOLERANCE = 12.5000
WRC-107 VERSION = MAR 79 1B1/2B1
WRC-107 INTERPOLATION = LAST VALUE
DEFAULT AMBIENT TEMPERATURE= 25.5035 C
BOURDON PRESSURE= NONE
COEFFICIENT OF FRICTION (MU) = 0.000000
INCLUDE SPRG STIF IN HGR OPE = NO
INCLUDE INSULATION IN HYDROTEST = YES
REDUCED INTERSECTION = B31.1(POST1980)
USE WRC329 NO
NO REDUCED SIF FOR RFT AND WLT NO
B31.1 REDUCED Z FIX = YES
CLASS 1 BRANCH FLEX NO
ALL STRESS CASES CORRODED = YES
ADD TORSION IN SL STRESS = DEFAULT
ADD F/A IN STRESS = DEFAULT
OCCASIONAL LOAD FACTOR = 1.00000
DEFAULT CODE = B31.8(ch 8)
B31.3 SUS CASE SIF FACTOR = 1.00000
ALLOW USERS BEND SIF = NO
USE SCHNEIDER NO
YIELD CRITERION STRESS = MAX 3D SHEAR
USE PD/4T NO
BASE HOOP STRESS ON ? = OD
EN13480 USE IN OUTPLANE SIFS= NO
LIBERAL EXPANSION ALLOWABLE= NO
B31.3 SEC 319.2.3C SAXIAL= NO
B31.3 WELDING/CONTOUR TEE ISB16.9 FALSE
PRESSURE VARIATION IN EXP CASE= DEFAULT
IMPLEMENT B313 APP-P YES
IMPLEMENT B313 CODE CASE 178 NO
IGNORE B31.1/B31.3 Wc FACTOR= NO
USE FRP SIF = YES
USE FRP FLEX = YES
BS 7159 Pressure Stiffening= Design Strain
FRP Property Data File= CAESAR.FRP
FRP Emod (axial) = 22064.0 Mpa
FRP Ratio Gmod/Emod (axial) = 0.250000
FRP Ea/Eh*Vh/a = 0.152730
FRP Laminate Type = THREE
FRP Alpha = 21.5983 C
FRP Density = 1660.80 kg./cu.m.
EXCLUDE f2 FROM UKOOA BENDING = NO



EXECUTION CONTROL PARAMETERS

Rigid/ExpJt Print Flag ..... 1.000
Bourdon Option ............. 1.000
Loop Closure Flag .......... 1.000
Thermal Bowing Delta Temp .. .000 C
Liberal Allowable Flag ..... .000
Uniform Load Option ........ .000

Ambient Temperature ........ 4.000 C
Plastic (FRP) Alpha ........ 21.598
Plastic (FRP) GMOD/EMODa ... .250
Plastic (FRP) Laminate Type. 3.000
Eqn Optimizer .............. .000
Node Selection ............. .000
Eqn Ordering ............... .000
Collins .................... .000
Degree Determination ....... .000
User Eqn Control ........... .000

COORDINATE REPORT
/--------------------(mm.)----------------------/
NODE X Y Z
10 .000 .000 .000
20 -290.000 .000 .000
30 -390.000 .000 .000

Submit the job through SmartSupport, please. This must be assinged an incident number and tracked.

Hi I am facing a new problem using ASME B31.8 Chapter VIII code.

When Defined hydro case the Factor entered in field is 0.72.

In code stress failure criteria. It takes allowable stress as 1*SMYS
However expected it should take 0.72*SMYS value entered in field.

In code no such reference is found that It must take factor 1.

Now i do not understand how to explain client.

As wall thickness is calculated with 0.72 for hydro case and it came as governing wall thickness (Higher between case of Design temprature and the Hydro case),. Pls help me with quick reply on this, preferable reference section from ASME B31.8 code. so that proper reply can be sent to the client.

Hi Richard Ay,

Can you please answer this query.

We really need to see your input file. Please open a Support Request on Smart Support and submit the file(s).

How can i upload the file on the smart support?
can you share the website address and advice the procedure to upload?

Send an email to: " Loren dot brown at intergraph dot com" and ask for the link and registration details.

Hi Loren is out of office . Pls send me access to smart drive

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On 23 Dec 2016 1:28 a.m., "Brown, Loren A" wrote:
I am currently out of the office and will return on January 3 2017. For critical support issues, please contact ppmcrm@intergraph.com