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DNVGL-ST-F101: Code Check
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Article - DNVGL-ST-F101 Code Check
DNVGL-ST-F101 : 2017
Design Calculation
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DNVGL-ST-F101 - Input parameters
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Pipe Geometry
Pipeline steel diameter
[OD]
[ID]
D
mm
Nominal wall thickness of pipe (un-corroded)
t
nom
mm
Fabrication thickness tolerance
[mm]
[%]
t
fab
Corrosion allowance
t
corr
mm
Ovality in Pipe (Out-of-Roundness)
O
o
%
Girth weld factor (strain resistance)
α
gw
-
Pipe Material
Select Material Grade
Others
ST-F101 245
ST-F101 290
ST-F101 320
ST-F101 360
ST-F101 390
ST-F101 415
ST-F101 450
ST-F101 485
ST-F101 555
API 5L Gr. X-42
API 5L Gr. X-46
API 5L Gr. X-52
API 5L Gr. X-56
API 5L Gr. X-60
API 5L Gr. X-65
API 5L Gr. X-70
API 5L Gr. X-80
Yield Strength of pipe material
SMYS
MPa
Tensile Strength of pipe material
SMTS
MPa
De-rating in yield strength due to temperature
f
y,temp
MPa
De-rating in tensile strength due to temperature
f
u,temp
MPa
Young's modulus of elasticity of steel
E
s
MPa
Poisson's ratio
ν
-
Strain hardening
α
h
-
Fabrication factor
α
fab
-
Supplementary requirement [P]
Material with Lüder plateau
Loads
Design Pressure
P
d
barg
@ reference elevation
m
density
kg/m
3
Test Pressure
P
test
barg
@ reference elevation
m
density
kg/m
3
Min. sustained pressure
P
min
barg
@ reference elevation
m
density
kg/m
3
Design
Incidental to design pressure ratio
γ
inc
-
Water depth w.r.t. mean sea level
W
D
m
Density of external fluid/ sea water
ρ
ext
kg/m
3
Maximum elevation w.r.t mean sea level
El.
max
m
Minimum elevation w.r.t mean sea level
El.
min
m
Safety class for pressure containment (bursting)
Low
Medium
High
Very High
All Factors = 1
Corroded
Derated
Safety class for System Pressure test
System Test
Corroded
Derated
Safety class for System Collapse
Low
Medium
High
Very High
All Factors = 1
Corroded
Derated
Min. sust. press.
Safety class for Propagation Buckling
Low
Medium
High
Very High
All Factors = 1
Corroded
Derated
Min. sust. press.
Buckle Propagation formula as per DNV 1981 if D/ t
2
> 45
Load Interaction
Local buckling - combined loading criteria
Load Controlled Condition (LCC)
Displacement Controlled Condition (DCC)
Condition load effect factors
γ
c
1.07
0.82
0.80
0.77
1.07 x 0.93
0.82 x 0.93
0.80 x 0.93
0.77 x 0.93
1.00
Reaction force from point load
R
kN
Select Pipeline Condition
Empty
Water-filled installation
System Test
Operation
LCC - Safety class
Low
Medium
High
Very High
All Factors = 1
Corroded
Derated
Point load
Min. sust. press.
DCC - Safety class
Low
Medium
High
Very High
All Factors = 1
Corroded
Derated
Point load
Min. sust. press.
Select Case
Functional
Environmental
Bending Moment
Moment [kNm]
Strain [%]
Curvature [1/m]
Radius [m]
Axial Force
Axial Force [kN]
Axial Strain [%]
Compressive Strain
Strain [%]
Bend Curv. [1/m]
Bend Radius [m]
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