DialogStart
NORSOK M-506 Corrosion Rate Model, Rev. 2, June 2005
NORSOK M-506 CO 2 CORROSION RATE MODEL The NORSOK M-506 corrosion rate model calculates calculates the CO 2 corrosion rate on basis of given temperature, pH, CO 2 partial pressure and shear stress. The model is valid for temperature 5 - 150 °C, pH 3.5 - 6.5, CO2 partial pressure 0.1 - 10 bar and shear stress 1 - 150 Pa. The model is not applicable when the H2S partial pressure is higher than 0.5 bar, or when the ratio between the partial pressure of CO 2 and H2S is less than 20. The model can lead to underprediction of the corrosion rate when the total content of organic acids exceeds 100 ppm and the CO2 partial pressure is less than 0.5 bar.
Continue
Exit
Information
NORSOK M-506 Main menu Input
Options on input Use as input:
Project
CO2 pressure CO2 fugacity
Equipment
Calculate shear stress
Identifier
Calculate pH
Options
Temperature
°C
Pressure
bar
Parameter study
mole%
Accumulated corrosion corrosion
Mole percent CO2 in gas Shear stress
Calculate humidity
Pa
pH
Print
Glycol concentration
0
%
Inhibitor efficiency
0
%
Save in new file / Load file Save in current file Show current file
Comment
Help Exit
CO2 fugacity
bar Output
Run the corrosion rate model Calculate corrosion rate
Corrosion rate without inhibitor effect
mm/year
NORSOK M-506 Main menu Input
Options on input Use as input:
Project
CO2 pressure CO2 fugacity
Equipment
Calculate shear stress
Identifier
Calculate pH
Options
Temperature
°C
Pressure
bar
Parameter study
mole%
Accumulated corrosion corrosion
Mole percent CO2 in gas Shear stress
Calculate humidity
Pa
pH
Print
Glycol concentration
0
%
Inhibitor efficiency
0
%
Save in new file / Load file Save in current file Show current file
Comment
Help Exit
CO2 fugacity
bar Output
Run the corrosion rate model Calculate corrosion rate
Corrosion rate without inhibitor effect
mm/year
DialogHum
NORSOK M-506 Humidity Menu Input Project
Options test 6 OK
Equipment Cancel Identifier Print Temperature
200
°C
Save in new file/Load file
Pressure
10
bar
Save in current file
Water mass flow
1
kmole/h
Show current file
Total mass flow
100
kmole/h
Help
Comment
Run Calculate
Output Relative humidity
%
Dew point
°C
DialogFlow
NORSOK M-506 Flow Menu Input
Options
Project
OK Cancel
Equipment
Print Identifier
Save in new file/Load file
Temperature
11
°C
Pressure
5
bar
Superficial liquid velocity
1
m/s
Gas flow
0
MSm³/day
Watercut
11
Save in current file Show current file Expert input
Diameter (ID)
%
11
mm
Comment Run Calculate Output Shear stress
Pa
Liquid viscosity
cp
Help Other input
Default
Roughness
50
Compressibility
0.9
Specific gravity
0.8
Water density
1024
kg/m³
Oil density
850
kg/m³
Gas density
6.254
kg/m³
Water viscosity
1.334
cp
Oil viscosity
1.1
cp
Gas viscosity
0.03
cp
Inversion point
0.5
Max rel. liq. visc.
7.06
µm
DialogFlow
DialogBicarb
NORSOK M-506 pH Menu Input
Option
Project Condensed water Equipment
Formation water
Identifier OK Temperature
60
°C
Pressure
5
bar
Mole percent CO2 in gas
1
bar
Cancel Print Save in new file/Load file Save in current file Show current file Help
Comment Run Calculate Output Calculated pH H in condensed water saturated with Fe2+
Page 7
DialogBicarb
DialogBicarb
Page 8
DialogChart
NORSOK M-506 Parameter Study 1. variable parameter
2. variable parameter
Temperature Range
pH
Min
20
°C
Max
150
°C
1. value
3.5
2. value
4.5
3. value
5.5
Other input parameters
Options
CO2 pressure
1E-5
bar
Shear stress
10
Pa
Pressure
5
bar
Glycol conc.
0
%
Return Update chart Print Save
DialogChart
NORSOK M-506 Parameter Study 1. variable parameter
2. variable parameter
Temperature Range
Other input parameters
pH
Min
20
°C
Max
150
°C
1. value
3.5
2. value
4.5
3. value
5.5
Chart title Default
CO2 pressure = 1E-5 bar, Shear stress = 10 Pa,
Options
CO2 pressure
1E-5
bar
Shear stress
10
Pa
Pressure
5
bar
Glycol conc.
0
%
Inh. efficiency
0
%
Return Update chart Print Save Help Zoom
Page 9
DialogAcc
NORSOK M-506 Accumulated Corrosion Input
Options
Line number
1
Start date
an-2002
End date
des-2002
CO2
1
bar
Shear stress
4
Pa
pH
4
Calc pH
Insert line
Return
Calc shear
Delete line
Print
Acc. off
Clear table
Save
Zoom
DialogAcc
NORSOK M-506 Accumulated Corrosion Input
Options
Line number
1
Start date
an-2002
End date
des-2002
Temperature
60
Pressure
5
CO2
1
bar
Shear stress
4
Pa
pH
4
°C
Glycol conc.
0
%
bar
Inhibitor eff.
0
%
Calc pH
Insert line
Return
Calc shear
Delete line
Print
Acc. off
Clear table
Save
Show chart
Zoom in
Load
Help
Zoom out
Page 10
DialogHelp
NORSOK M-506 Help Menu Helpmenu for the NORSOK M-506 user interface THE SAVE MENU The save menu provides two different alternatives: 1. Save data in a new separate Excel file 2. Load a previous saved Excel file and add saved data to this file If it is wanted to save data in a new separate Excel file the parameters that are supposed to be saved must be turned on in this save menu. Click the button called "Create new file" when the desired parameters are turned on, and then the program will ask for the file name before the program returns to the previous shown menu. In this case the current data will be saved as the first set of data in the new file. If it is wanted to use a previous saved file to save new data the file can be loaded by pressing the Load button. In such cases it has no meaning to turn on or off any parameters in the save menu because the same parameters that have been saved
OK
DialogHelp
NORSOK M-506 Help Menu Helpmenu for the NORSOK M-506 user interface THE SAVE MENU The save menu provides two different alternatives: 1. Save data in a new separate Excel file 2. Load a previous saved Excel file and add saved data to this file If it is wanted to save data in a new separate Excel file the parameters that are supposed to be saved must be turned on in this save menu. Click the button called "Create new file" when the desired parameters are turned on, and then the program will ask for the file name before the program returns to the previous shown menu. In this case the current data will be saved as the first set of data in the new file. If it is wanted to use a previous saved file to save new data the file can be loaded by pressing the Load button. In such cases it has no meaning to turn on or off any parameters in the save menu because the same parameters that have been saved in the loaded file earlier will still be saved in this file. When a file is loaded in this way the actual parameters will not be saved automatic. The data will only be saved by clicking the buttons called "Save in current file" in the different menus. Click the Cancel button to return to the previous menu without creating a new file or loading an old file.
OK
DialogSave
NORSOK M-506 Save Menu Choose which paramaters to save
Create new file
Load file
Cancel
All menues Project Equipment Identifier Comment
Temperature Pressure Total mass flow CO2 mass flow
Mole% CO2 CO2 pressure CO2 fugacity
Main menu Shear stress pH Glycol concentration Inhibitor efficiency
Glycol correction factor Corrosion rate without inhibitor or glycol effect Corrosion rate with inhibitor or glycol effect
pH menu Bicarbonate Ionic strength
Calculated pH pH in solution satureted with Fe2+
Flow menu Superficial liquid velocity Superficial gas velocity Liquid flow Gas flow Watercut Diameter (ID) Water density
Oil density Gas density Water viscosity Oil viscosity Gas viscosity Inversion point Max rel. liq. viscosity
Roughness Spesific gravity Compressibility
Relative humidity
Dew point
Calculated shear stress Calculated liquid viscosity
Humidity menu Water mass flow
DialogSave
Help
DialogShow
Show Data Return Print Help Zoom in Zoom out
SheetModell
Input Temperature (°C) pCO2 (bar) pH Shear stress (Pa) Result Corrosion rate (mm/y) Calculations Lowest temp Highest temp
K pCO2 factor Shear factor pH factor
60 2 5 19
11.0291465
Glycol factor
1
Inhibitor factor
1
CR with inhibitor effect 11.02915
60 80 Lowest temp. Highest temp. 10.695 9.949 1.53687518 1.53687518 1 1 0.671 0.60360857
Corrosion rate
11.0291465
a b
-0.0899874 16.4283888
9.22939911
Calculation of corrosion rate with NORSOK Standard M-506 Rev.2, June 2005
5 °C
0.857
SheetModell
Used pCO2 Used pH Used shear
15 °C
0.801
20 °C
0.782
2 5 19
40 °C
0.782
60 °C
80 °C
0.671 0.603609
90 °C
0.39016
120 °C
0.1902
150 °C
0.0365
242681024.xls.ms_office
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42
A INPUT
B
C QL SM/D ROUGH 5.00E-05 RO.O 8.50E+02 RO.L 869.14 VISC.L 1.51133 VISC.G 0.03 2 2
REGIME VG CRIT VL CRIT VL CRIT
D 8.2067 kg/m3 RO.G VL(M/S) LAMDA Cr0.5
18.5292 M/S 0.24162 M/S 0.27 M/S
E
F G H QG MMSM3/D 0 VISC.O WC 0.11 D(M) 0.011 T 11 P(BAR) 5 6.25404 R0.GSC 0.96478 VISC.W 1 VG(M/S) 0 VM(M/S) 1 VISC.M 1.51133 RO.M
I
J CP 1.1 SP.GR 0.8 Z 0.9 1.3336 Waterden 1 869.14
K LIM
L 1.53366
1024
FLOW SMOOTH REGIME: PIPE LIQUID 623.557 YEARS TO FAILURE OF ST52 STEEL BY MESA ATTACK ************************************************************************************************ OBSTACLE 507.703 YEARS TO FAILURE
POSSIBL STRAT SLUG ANNULAR ATOMIZED LIQUID NLIM= 2.84E+12 YIELD= 426 Pa SMOOTH PIPE: EXPONENT 0.99742 LIFETIME 623.557 YEARS CANNOT EXEED: 623.557 YEARS 227598 DAYS
HOLD UP
0.98345
EXPONENT LIFETIME CANNOT EXEED:
0.98345
0.99912 16085 YEARS 16085 YEARS 5871029 DAYS
LIQUID, STRATIFIED,DISPERSED,ANNULAR RE 6325.91 FRICT 0.01001 OBSTACLE: TAU 4.34977 REL-AMP V EQ 1 EXPONENT F 134 LIFETIME TAUAMP 1.08744 CANNOT EXEED:
0.94 0.99025 507.703 YEARS 507.703 YEARS 185311 DAYS
FATIGUE IF TREATED AS SLUG FLOW RE 6324.56 ALPHA L 0.98345 ROM 854.859 VISCM 1.48681 FO 0.01001 OBSTACLE: TAUW 6.16099 REL-AMP 0.94 TAUAMP 0.36966 EXPONENT 0.99025 F-SLUG 5.45455 LIFETIME 12472.6 L-UNIT 0.22 M CANNOT EXEED: 12472.6 L-SLUG 0.22 M 4552486 TAUMEA 4.34977 PA Taumean slug: 0.31161 TOO LO V EQ 0.99998 NET TIME TO FAILURE:
YEARS YEARS DAYS !
Page 17
NORSOK M-506
Calculated results from the NORSOK M-506 CO2 corrosion rate model
Equipment c c c
Identifier
Temperature
Pressure
°C 20 20 68
bar 1 1 1
CO2 partial pressure bar 0.1 0.1 0.16
mole% CO2 % 10 10 16
CO2 fugacity bar 0.1 0.1 0.16
Shear stres s Pa 10 10 10
Inhibitor efficiency
pH 5 5 5
% 0 0 0
NORSOK M-506
Calculated results from the NORSOK M-506 CO2 corrosion rate model
Equipment
Identifier
c c c
Temperature
Pressure
°C 20 20 68
bar 1 1 1
CO2 partial pressure
mole% CO2 % 10 10 16
bar 0.1 0.1 0.16
CO2 fugacity bar 0.1 0.1 0.16
Shear stres s Pa 10 10 10
18
% 0 10 10
1 0.84 0.84
Spesific gravity 0.8 0.8 0.8
Water viscosity cp 1.089 1.089 0.4373
Maximum relative liquid viscosity 7.06 7.06 7.06
Corrosion rate Corrosion rate without with inhibitor inhibitor effect or glycol effect Comment mm/year 0.83 0.83 1.1
5 5 5
% 0 0 0
8/31/2014
NORSOK M-506
Glycol Glycol reduction concentration factor
Inhibitor efficiency
pH
mm/year 0.83 0.7 0.93
NORSOK M-506
Glycol Glycol reduction concentration factor % 0 10 10
1 0.84 0.84
Spesific gravity 0.8 0.8 0.8
Water viscosity
Maximum relative liquid viscosity
cp 1.089 1.089 0.4373
7.06 7.06 7.06
Corrosion rate Corrosion rate without with inhibitor inhibitor effect or glycol effect Comment mm/year 0.83 0.83 1.1
mm/year 0.83 0.7 0.93
19
8/31/2014
NORSOK M-506
Pressure CO2 pressure = 55 bar, = 1E-5 Shear bar, stress Shear = 64 stress Pa, =CO2 10 Pa, = 5 mole% ) ) r r a a e e y / y / m m m m ( ( / / e e t t a a r r n n o i o i s s o o r r r r o o C C
0.012 0.012 0.01 0.01 0.008 0.008
pH=4 pH=4 pH=5 pH=5
0.006 0.006
pH=6 pH=6
0.004 0.004 0.002 0.002 00 0 3.5
50 53.5
100 103.5 Temperature//(°C) (°C) Temperature
150 153.5
200 203.5
NORSOK M-506
Pressure CO2 pressure = 55 bar, = 1E-5 Shear bar, stress Shear = 64 stress Pa, =CO2 10 Pa, = 5 mole% ) ) r r a a e e y / y / m m m m ( ( / / e e t t a a r r n n o i o i s s o o r r r r o o C C
0.012 0.012 0.01 0.01 0.008 0.008
pH=4 pH=4 pH=5 pH=5
0.006 0.006
pH=6 pH=6
0.004 0.004 0.002 0.002 00 0 3.5
50 53.5
100 103.5
150 153.5
200 203.5
Temperature//(°C) (°C) Temperature
Page 20
SheetAccChart
Accumulated Corrosion corrosion 1 1.2
m ) r 0.9 m a / e 1 0.8 y n / o0.7 i m s m0.8 o0.6 ( r r / o0.5 e 0.6 c t a r d0.4 e n 0.4 t 0.3 a i l o s u0.2 0.2 r m o r u0.1 c o c C 0 0 A 0 0
200 200 400 400
600600
800800
1000 1000
1200 1200
Time Time / date / date
1400 1400
1600 1600
1800 1800
2000 2000
SheetAccChart
Accumulated Corrosion corrosion 1 1.2
m ) r 0.9 m a / e 1 0.8 y n / o0.7 i m s m0.8 o0.6 ( r r / o0.5 e 0.6 c t a r d0.4 e n 0.4 t 0.3 a i l o s u0.2 0.2 r m o r u0.1 c o c C 0 0 A 0 0
200 200 400 400
600600
800800
1000 1000
1200 1200
1400 1400
1600 1600
1800 1800
2000 2000
Time Time / date / date
Page 21
M506Chart
Calculated results from the NORSOK M-506 CO 2 corrosion model, rev. 2 Temperature / (°C) 20 26.5 33 39.5 46 52.5 59 65.5 72 78.5 85 91.5 98 104.5 111 117.5 124 130.5 137 143.5 150
pH=3.5 pH=4.5 pH=5.5 4.427861 3.616083 1.884596 5.686505 4.643975 2.420303 6.945149 5.671867 2.95601 8.203793 6.699759 3.491717 8.65226 7.156366 3.369722 9.033212 7.565365 3.192918 9.414164 7.974365 3.016114 9.69586 7.920688 2.815738 9.959509 7.782889 2.611077 10.22316 7.64509 2.406415 8.602593 6.189111 1.482072 6.890631 4.747182 0.618993 6.758233 4.67026 0.679807 6.625835 4.593339 0.740621 6.493436 4.516417 0.801435 6.361038 4.439496 0.862249 5.980939 3.917955 0.786504 5.446028 3.118527 0.62541 4.911116 2.319099 0.464316 4.376205 1.519671 0.303222 3.841293 0.720242 0.142128
M506Chart
Calculated results from the NORSOK M-506 CO 2 corrosion model, rev. 2 Temperature / (°C) 20 26.5 33 39.5 46 52.5 59 65.5 72 78.5 85 91.5 98 104.5 111 117.5 124 130.5 137 143.5 150
pH=3.5 pH=4.5 pH=5.5 4.427861 3.616083 1.884596 5.686505 4.643975 2.420303 6.945149 5.671867 2.95601 8.203793 6.699759 3.491717 8.65226 7.156366 3.369722 9.033212 7.565365 3.192918 9.414164 7.974365 3.016114 9.69586 7.920688 2.815738 9.959509 7.782889 2.611077 10.22316 7.64509 2.406415 8.602593 6.189111 1.482072 6.890631 4.747182 0.618993 6.758233 4.67026 0.679807 6.625835 4.593339 0.740621 6.493436 4.516417 0.801435 6.361038 4.439496 0.862249 5.980939 3.917955 0.786504 5.446028 3.118527 0.62541 4.911116 2.319099 0.464316 4.376205 1.519671 0.303222 3.841293 0.720242 0.142128
CO2 pressure Shear stress Trykk Glycol concentration Inhibitor reduction factor
1 5 80 0 0
bar Pa bar % (concentration)
Page 22
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
A Actual dialog number Recent dialog number Dialog to check the inp
B
C
D
0 1 0
E use press Use of ex
F
G H 1 pressure in B9 1 1
I
J
K
L
INPUTPARAMETER VALUE lovlig inp ny input h min max unit chois unit value in unit Old value Old unit Temperature FALSE 5 150 1 °C 0 C 60 1 pH FALSE 3.5 6.5 0 4 CO2 content in gas FALSE FALSE 0.09 10 3 mole% 0 bar (CO2 t 1 1 Shear stress FALSE 1 150 Pa 0 Pa 10 Trykk FALSE 1 1000 1 bar 0 bar 5 1 Glycol concentration 0 TRUE 0 100 % (conce 1 fraction 0 Inhibitor reduction factor 0 TRUE 0 100 % 1 fraction 0 Liquid flow FALSE 0 13564.8 1 Sm3/day 0 Sm3/day 0 1 Gas flow TRUE 0 0.2812 1 MSm3/da 0 Sm3/day 1 Watercut FALSE 100 0 100 0 Diameter (ID) FALSE 100 0 mm 0 m Inversion point use default TRUE 0.5 0.3 0.9 0.5 use default max relative liq visc use default TRUE 7.06 1 100 1 7.06 cp use default Tetthet vann use default TRUE 1024 995 1050 kg/m3 1024 kg/m3 use default Viskositet vann use default TRUE 1 0.17 1.1 1 cp 1 cp use defaul 1 Tetthet olje use default TRUE 850 600 1100 kg/m3 850 kg/m3 use default Viskositet olje use default TRUE 1.1 0.2 200 1 cp 1.1 cp use default tetthet gass use default TRUE 10 1 1700 kg/m3 10 kg/m3 use default viskositet gass use default TRUE 0.03 0.02 0.06 1 cp 0.03 cp use default Ruhet use default TRUE 50 0 100 um 0.00005 m use default Z use default TRUE 0.9 0.8 1 0.9 use default sp.gr use default TRUE 0.8 0.5 1 0.8 use default Total mass flow TRUE 1 0.001 1000000 kmole/h 0 kmole/h Alle input OK FALSE grafisk fremstilling Temperature / (°C)
pH=4
pH=5
pH=6
beregning av verdier for grafisk fremstilling Temperat pH=4 pH=5 pH=6
M
N
O
P
Q
Calculation of other parameters
fugasity o
0 fugasity in
fugasityco
1
Liquid visc
0 cp
0
lign for va
1000
A B C D E F G H I J K L 1 Actual dialog number 0 use press 1 pressure in B9 2 Recent dialog number 1 1 1 Use of ex 3 Dialog to check the inp 0 4 5 6 INPUTPARAMETER VALUE lovlig inp ny input h min max unit chois unit value in unit Old value Old unit 7 Temperature FALSE 5 150 1 °C 0 C 60 1 8 pH FALSE 3.5 6.5 0 4 9 CO2 content in gas FALSE FALSE 0.09 10 3 mole% 0 bar (CO2 t 1 1 10 Shear stress FALSE 1 150 Pa 0 Pa 10 11 Trykk FALSE 1 1000 1 bar 0 bar 5 1 12 Glycol concentration 0 TRUE 0 100 % (conce 1 fraction 0 13 Inhibitor reduction factor 0 TRUE 0 100 % 1 fraction 0 14 Liquid flow FALSE 0 13564.8 1 Sm3/day 0 Sm3/day 0 1 15 Gas flow TRUE 0 0.2812 1 MSm3/da 0 Sm3/day 1 16 Watercut FALSE 100 0 100 0 17 Diameter (ID) FALSE 100 0 mm 0 m 18 Inversion point use default TRUE 0.5 0.3 0.9 0.5 use default 19 max relative liq visc use default TRUE 7.06 1 100 1 7.06 cp use default 20 Tetthet vann use default TRUE 1024 995 1050 kg/m3 1024 kg/m3 use default 21 Viskositet vann use default TRUE 1 0.17 1.1 1 cp 1 cp use defaul 1 22 Tetthet olje use default TRUE 850 600 1100 kg/m3 850 kg/m3 use default 23 Viskositet olje use default TRUE 1.1 0.2 200 1 cp 1.1 cp use default 24 tetthet gass use default TRUE 10 1 1700 kg/m3 10 kg/m3 use default 25 viskositet gass use default TRUE 0.03 0.02 0.06 1 cp 0.03 cp use default 26 Ruhet use default TRUE 50 0 100 um 0.00005 m use default 27 Z use default TRUE 0.9 0.8 1 0.9 use default 28 sp.gr use default TRUE 0.8 0.5 1 0.8 use default 29 Total mass flow TRUE 1 0.001 1000000 kmole/h 0 kmole/h 30 Alle input OK FALSE 31 32 grafisk fremstilling beregning av verdier for grafisk fremstilling 33 Temperature / (°C) pH=4 pH=5 pH=6 Temperat pH=4 pH=5 pH=6 34 20 0.004757 0.00389 0.00203 20 0.00476 0.00389 0.00203 35 26.5 0.006109 0.00499 0.0026 26.5 0.00611 0.00499 0.0026 36 33 0.007461 0.00609 0.00318 33 0.00746 0.00609 0.00318 37 39.5 0.008813 0.0072 0.00375 39.5 0.00881 0.0072 0.00375 38 46 0.009295 0.00769 0.00362 46 0.0093 0.00769 3.62E-03 39 52.5 0.009704 0.00813 0.00343 52.5 0.0097 0.00813 3.43E-03 40 59 0.010113 0.00857 0.00324 59 0.01011 0.00857 3.24E-03 41 65.5 0.010416 0.00851 0.00303 65.5 0.01042 0.00851 3.03E-03 42 72 0.010699 0.00836 0.00281 72 0.0107 0.00836 2.81E-03 43 78.5 0.010983 0.00821 0.00259 78.5 0.01098 0.00821 2.59E-03 44 85 0.009242 0.00665 0.00159 85 0.00924 0.00665 1.59E-03 45 91.5 0.007402 0.0051 0.00067 91.5 0.0074 0.0051 6.65E-04 46 98 0.00726 0.00502 0.00073 98 0.00726 0.00502 7.30E-04 47 104.5 0.007118 0.00494 0.0008 104.5 0.00712 0.00494 7.96E-04 48 111 0.006976 0.00485 0.00086 111 0.00698 0.00485 8.61E-04 49 117.5 0.006834 0.00477 0.00093 117.5 0.00683 0.00477 9.26E-04 50 124 0.006425 0.00421 0.00085 124 0.00643 0.00421 8.45E-04 51 130.5 0.005851 0.00335 0.00067 130.5 0.00585 0.00335 6.72E-04 52 137 0.005276 0.00249 0.0005 137 0.00528 0.00249 4.99E-04 53 143.5 0.004701 0.00163 0.00033 143.5 0.0047 0.00163 3.26E-04 54 150 0.004127 0.00077 0.00015 150 0.00413 0.00077 1.53E-04 55 56 Opsjoner for grafisk fremstilling 57 58 choise Parameter Unit Label on b Use default options 59 use velocity or shear str 1 Shear stre Pa velocity TRUE 60 61 chartlist 1 chartlist 2 62 Temperature pH 63 pH Pressure 64 Pressure Shear stress 65 Shear stress 66 67 1.parameter 2. parame 3. parame 4. parameter 68 Valgt index 1 1 Old value 1 69 Valgt parameter Temperature pH Pressure Shear stress 70 unit °C bar Pa 71 input in line 7 8 11 10 72 line in model 2 4 6 5 73 74 Lovlig min max Default Value in model unit 75 Range, min 5 TRUE 5 5 5 76 Range, max 150 TRUE 150 150 150 77 1. value 4 TRUE 3.5 6.5 4.25 4 78 2. value 5 TRUE 3.5 6.5 5 5 79 3. value 6 TRUE 3.5 6.5 5.75 6 80 All legal TRUE 81 82 83 Options for accumulated corrosion 84 time,end Dec-2005 85 Show chart or table : 1 Show Table Label on ButtonSho Show chart time,start Jan-2005 LineNumb 1 86 Integrated chart or not : 1 Integrated Label on ButtonInteg Acc. off legal time TRUE Min time 0 87 legal line TRUE 88 89 Options for calculation of pH 90 91 INPUTPARAMETER VALUE lovlig inpu ny input h min max unit chois unit value in m unit Old value Old unit 92 Bicarbonate 0 TRUE 0 0 32000 2 mg/l 0 M 0 2 93 Ionic strenght 0 TRUE 0 0 175 2 g/l 0 M 0 2 94 95 96 Options for calculation of maximum flow rate 97 98 INPUTPARAMETER VALUE lovlig inpu ny input h min max 99 Ratio gas/liquid flow 0.00E+00 TRUE 0 0 1E+12 100 101 102 Options for saving and plotting data at main menu
M
N
O
P
Q
Calculation of other parameters
fugasity o
0 fugasity in
fugasityco
1
Liquid visc
0 cp
0
lign for va
1 Max time
1000
Data save 73200 Accumulat
0 0
FALSE FALSE
Use condenced wate Saturated pH
1
TRUE
105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184
A Saving status Default status Current dialog status Next line in sheet M506 Units when saving
B
C D 1 1 1 1 1 1 2 default Saving m 8
E
F
G 1 0 1 0 FALSE Data save
1 1 0 1
H
I 1 1 0
1
1 1 FALSE
3
St52
Cr0.5
Sheets position Sheet SSH97Data
line
Sm3/day MSm3/day
column 1
old line 1
1
m/s m/s
Sm3/day MSm3/day
old column 1
Calculation of humidity flow/kmole/h min Flow of H2O Total flow vanndamptrykk Saturation temperature
max legal 0.001 1000000 FALSE 0.001 1000000 FALSE 1.55E+01 bar C
all input le Old value FALSE
Relativ fuktighet
Data for plot of accumulated corrosion Line
start date 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
end date time perio time 1900
Acc corr 0
%
K 0 0
L 1 1
1
Shear stress calculations Max recommended shear stress Max recommended liquid superficial v m/s Max recommended gas superficial vel m/s DialogHeight small
J
M 0 0
N 0 0
O 0 0
P 0 0
Q 0 0
0 0
R 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 Old value 93 94 95 96 97 98 99 100 101 102
S
T
1
U
V
W
X
Y
Z
AA
AB
AC
AD
AE
AF
AG
AH
AI
R 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184
S 0 0
T 0 0
U 0 0
V 0 0
W 0 0
X 0 0
Y 0 0
Z 0 0
AA 0 0
AB 0 0
AC 0 0
AD
AE
AF
0 0
0 0
0 0
1
1
1
AG 0 0
AH 0 0
AI 0 0
0 0
1
2
AJ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102
AK
AL
AM
AN
AO
AP
AQ
AR
AS
AT
AU
AV
AW
AX
AY
AZ
BA
AJ 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184
AK 0 0
AL 0 0
AM 0 0
AN 0 0
2
1 1
AO 0 0
AP 0 0
AQ 0 0
AR 0 0
AS 0 0
AT 0 0
AU 0 0
AV 0 0
AW 0 0
AX 0 0
AY 0 0
AZ 0 0
BA 0 0
0 0
BB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102
BC
BD
BE
BB 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184
BC 0 0
BD 1 0
BE 1 0
1 1
x
Calculated results from NORSOK M-506 Project
a
Equipment
a
Identifier
c
Comment
d INPUT
Temperature
90
°C
Pressure
10
bar
Total mass flow CO2 content in gas
10
kmole/h mole%
Shear stress
10
Pa
pH
5
Glycol concentration Inhibitor efficiency
10
%
5
%
OUTPUT CO2 fugacity Glycol reduction factor
0.98
bar
0.8449
Corrosion rate
2.2
mm/year
Corrosion rate with inhibitor or glycol effect
1.9
mm/year
x
x
Calculated results from NORSOK M-506 Project Equipment Identifier Comment INPUT Temperature
30
°C
Pressure
10
bar
Total mass flow CO2 content in gas
10
kmole/h mole%
Bicarbonate concentration
mg/l
Ionic strength
g/l
OUTPUT pH pH in condensed water saturated with Fe
3.9 2+
5 x
x
Calculated results from NORSOK M-506 Project
ssh
Equipment
a
Identifier
v
Comment
test INPUT
Temperature
20
°C
Pressure
10
bar
Total mass flow
100
kmole/h
Water mass flow
2
kmole/h
OUTPUT Relative humidity Dew point
855.2
%
60
°C x
x
Calculated results from NORSOK M-506 Project Equipment Identifier Comment INPUT Temperature
50
°C
Pressure
10
bar
Superficial liquid velocity
6
m/s
Superficial gas velocity
6
m/s
Watercut
100
Diameter (ID)
100
mm
Water density
1024
kg/m
3
850
kg/m
3
Gas density
10.83
kg/m
3
Water viscosity
0.5956
cp
Oil viscosity
1.1
cp
Gas viscosity
0.03
cp
Oil density
Maximum relative liquid viscosity
0.5956
Inversion point
0.5
Maximum relative liquid viscosity
7.06
Rougness
5.00E-05
Compressibility
0.9
Specific gravity
0.8
µm
OUTPUT Liquid viscosity Shear stress
0.5956
cp
-17
Pa x
SheetHelp
ABOUT THE NORSOK M-506 CORROSION RATE CALCULATION MODEL
This computer program is developed based on the corrosion rate model given as equations in this Standard. The corrosion rate equations given in NORSOK M-506 describe the formal model which shall apply, while the computer program itself is an optional aid which the users of the model may apply such that they possess an efficient tool to conduct corrosion rate calculations and parameter studies. It is an overall principle for the use of this program that the program is an aid in CO2 corrosion rate assessments, but that the user of the program is responsible for the results and the final material selections. Therefore the user of the program must perform a critical evaluation of all results and the applicability of these in each case and in each system/part of a system. As the computer program is distributed electronically and may be used on computers and program versions outside the control of NTS/NORSOK, users of the computer program are sole responsible to verify that the computer calculations are in accordance with the equations in this standard. The CO2 corrosion rate calculation program shall only be used by experienced material engineers. The program covers only calculation of corrosion rates where CO2 is the corrosive agent. It does not include additional effects of other constituents which may influence the corrosivity, e.g. contamination of O2, H2S etc. If such constituents are present, which is common in e.g. produced water systems, these effects must be evaluated separately. The model is valid for temperature 5 - 150 °C, pH 3.5 - 6.5, CO2 partial pressure 0.1 - 10 bar and shear stress 1 - 150 Pa. The model is not applicable when the H2S partial pressure is higher than 0.5 bar, or when the ratio between the partial pressure of CO2 and H2S is less than 20. The model can lead to underprediction of the corrosion rate when the total content of organic acids exceeds 100 ppm and the CO2 partial pressure is less than 0.5 bar. Design principles for material selection and the philosophies which shall apply are given in NORSOK standard M-001 "Material Selection". The requirements in NORSOK M-001 shall always apply, and shall be used when generating input data and when interpreting results from this CO2 corrosion rate calculation program. It is important to note that the program may use or generate data which are outside the limits of NORSOK M-001. One example is corrosion inhibitor efficiency, where NORSOK M-001 provides maximum allowable values, while this program accepts all values from 0 to 100%. In case of conflict, NORSOK M-001 shall apply. The computer program has a main dialogue box, denoted as the "Main Menu", where all corrosion rate calculations can be performed. All input parameters can be entered into the program directly at this stage for point calculations. As options and support functions, it is possible to calculate several of the main input parameters by selecting optional dialogue boxes. Such options are:
SheetHelp
* * *
pH calculations shear stress calculations humidity calculations for gas systems
These program routines are included in order to make the material selection specialist able to generate adequate input data for corrosion rate prediction based on data normally presented in process flow diagrams and design basis documents. The support program routines are prepared to give adequate accuracy for corrosion rate calculations, and shall not be used for other purposes, e.g. genuine process, scale or flow calculations. The program is explained in more detail in NORSOK Standard M-506. It is important that your computer uses a period as a decimal separator. The program will not be able to calculate correctly if other symbols are used as decimal separator. The decimal separator can be changed from the option called International or Regional and Language Options in the control panel. Minimum screen resolution must be 600x800. The current version of the model is Revision 2, issued in June 2005. It supersedes Revision 1, issued in May 1998. Major changes from Revision 1 are extension of the lower temperature limit from 20 to 5 °C and improved correlations for pH calculation at high pressure and high ionic strength. Please note that whilst every effort has been made to ensure the accuracy of the NORSOK standards neither OLF nor TBL or any of their members will assume liability for any use thereof.
SheetHelp
SheetHelp
MAIN MENU
OPTIONS UNITS Press the unit buttons to change the unit of temperature, pressure and CO2 partial pressure. CALCULATE CORROSION RATE Press this button to calculate the corrosion rate by the NORSOK M-506 model. USE AS INPUT: CO2 PARTIAL PRESSURE OR FUGACITY Use this option to select partial pressure or fugacity as input. The fugacity of CO2 (calculated if not given as input) is always used in the corrosion model. CALCULATE SHEAR STRESS The wall shear stress can be calculated from given liquid and gas velocities. Press this button to enter the menu for calculation of shear stress. CALCULATE pH The pH can be calculated from the given bicarbonate concentration. Press this button to enter the menu for calculation of pH. PARAMETER STUDY Press this button to get a graphic representation of the corrosion rate as function of the input parameters. ACCUMULATED CORROSION Press this button to enter a menu where it is possible to get a time dependent representation of the corrosion rate. CALCULATE HUMIDITY The relative humidity can be calculated. Press this button to enter the menu for calculation of relative humidity.
PRINT Press this button to print the input and output values. SAVE IN NEW FILE Press this button to save the input and output values in a separate Excel file. The data can either be saved in a new Excel file or a previous saved file can be loaded and then the saved data will be added to this file. SAVE IN CURRENT FILE Press this button to save the input and output values in the same file that has been used for saving values before. Values for the same parameters that have been saved in this file before will be saved. SHOW CURRENT FILE Press this button to see the data that has been saved in the current file. EXIT Exit the NORSOK M-506 model.
SheetHelp
INPUT PARAMETERS PROJECT, EQUIPMENT, IDENTIFIER AND COMMENT The project name, equipment, identifier and any comments can be given. These names can be saved together with other data when the save buttons are pressed. TEMPERATURE Allowed range is from 5 °C to 150 °C. The temperature can be given in °C or °F. TOTAL PRESSURE Allowed range is from 1 bar to 1000 bar. The total pressure can be given in bar or psi. The total pressure must be higher then the CO2 partial pressure. TOTAL MASS FLOW Allowed range is from 0.001 to 1000000 kmole/h. The total mass flow is required to calculate the CO2 partial pressure when the amount of CO2 is given in kmole/h. The total mass flow will therefore only be shown in the menu when kmole/h is chosen as the unit for the CO2 amount. CO2 Allowed range for the fugacity of CO2 is from 0.1 to 10 bar, but the CO2 pressure can not be higher than the given total pressure. Due to lack of data points at fugacities below 0.3 bar, the calculation is uncertain at CO2 fugacities below 0.3 bar. The amount of CO2 can be given in bar, psi, mole% or kmole/h. It is possible to specify either the CO2 partial pressure or the CO2 fugacity by using the option called "Use as input: CO2 pressure or CO2 fugacity". SHEAR STRESS Allowed range is from 1 to 150 Pa. pH Allowed range: 3.5 to 6.5. GLYCOL CONCENTRATION The glycol concentration is given in percent. Allowed range is from 0 to 100 %. If you don't want any glycol effect on the calculation of the corrosion rate, just enter 0 % of glycol. INHIBITOR EFFICIENCY The effect of inhibitor is given in percent. Allowed range is from 0 to 100 %. The inhibitor efficiency equals the value of the corrosion rate adjusted for the inhibitor effect divided with the corrosion rate without any inhibitor effect multiplied with 100. If no inhibitor effect on the calculation of the corrosion rate is desired, enter 0 % inhibitor efficiency.
RESULTS FUGACITY The CO2 fugacity will be calculated based on given temperature, pressure and given amount of CO2. GLYCOL CORRECTION FACTOR The glycol correction factor will be calculated based on the given glycol
SheetHelp
concentration. The glycol correction factor equals the value of the corrosion rate adjusted for the effect of glycol divided with the corrosion rate without any glycol effect. CORROSION RATE WITHOUT GLYCOL OR INHIBITOR EFFECT The calculated corrosion rate without any correction factors will be shown when the button called "Calculate corrosion rate" is pressed. CORROSION RATE WITH GLYCOL OR INHIBITOR EFFECT The calculated corrosion rate with correction factor will be shown when the button called "Calculate corrosion rate" is pressed. If the effect of inhibitor is higher than the effect of glycol, the corrosion rate with only the inhibitor effect will be shown. If the effect of glycol is higher than the effect of inhibitor, the corrosion rate with only the glycol effect will be shown. If there is no effect of glycol or inhibitor, only the corrosion rate without any correction factors will be shown.
SheetHelp
THE FLOW MENU
OPTIONS UNITS Press the unit buttons to change the unit of temperature, pressure, liquid flow, gas flow and viscosity. CALCULATE Press this button to calculate the shear stress and flow regime. OK Press this button to get back to the main menu and use the calculated shear stress in the corrosion rate model. CANCEL Press this button to get back to the main menu without using the calculated shear stress. All the values in the flow menu will be restored. PRINT Press this button to print the input and output values. SAVE IN NEW FILE Press this button to save the input and output values in a separate Excel file. The data can either be saved in a new Excel file or a previous saved file can be loaded and then the saved data will be added to this file. SAVE IN CURRENT FILE Press this button to save the input and output values in the same file that has been used for saving values before. Values for the same parameters that have been saved in this file before will be saved. SHOW CURRENT FILE Press this button to see the data that has been saved in the current file.
EXPERT INPUT Press this button to show the parameters viscosity, density, inversion point, roughness, compressibility and specific gravity. When the user interface starts, default values will be used for these parameters until the user choose to use other values. DEFAULT CHECK BOXES There are default check boxes for the density, viscosity, inversion point, roughness, compressibility and specific gravity. When a default option is turned on, a built in function or default value is used for the actual parameter.
INPUT PARAMETERS PROJECT, EQUIPMENT, IDENTIFIER AND COMMENT The project name, equipment, identifier and any comments can be given. These names can be saved together with other data when the save buttons are pressed. TEMPERATURE
SheetHelp
Allowed range is from 5 °C to 150 °. The temperature can be given in °C or °F. TOTAL PRESSURE Allowed range is from 1 bar to 1000 bar. The total pressure can be given in bar or psi. LIQUID VELOCITY / LIQUID FLOW Allowed range is from 0 to 20 m/s. The liquid flow rate can be given as liquid superficial velocity (unit m/s) or liquid flow (unit Sm3/day). Press the unit button to switch between these units. Superficial liquid velocity equals the actual liquid velocity multiplied with the liquid volume fraction. GAS VELOCITY / GAS FLOW Allowed range is from 0 to 40 m/s. The gas flow rate can be given as gas superficial velocity (unit m/s) or gas flow (unit millions of Sm3/day). Press the unit button to switch between these units. Superficial gas velocity equals the actual gas velocity multiplied with the liquid volume fraction. WATERCUT Allowed range is from 0 to 100 %. The watercut gives the amount of water in the liquid phase. DIAMETER The diameter can be any positive number. The calculation of shear stress is requires turbulent flow. This means that the diameter and the flow velocities must be given values that results in a Reynold number above 2300.
DENSITY The allowed ranges for the density of water, oil and gas are: 995 to 1050 kg/m3 for water density, 600 to 1100 kg/m3 for oil density, 1 to 1700 kg/m3 for gas density. VISCOSITY The allowed ranges for the viscosity of water, oil and gas are: 0.17 to 1.1 cp for water viscosity, 0.2 to 200 cp for oil viscosity, 0.02 to 0.06 cp for gas viscosity. The viscosity of water, oil and gas can be given in cp (centipoise) or N*s/m2. ROUGHNESS Allowed range for the roughness of the steel is 0 to 100 µm. COMPRESSIBILITY Allowed range is from 0.8 to 1. The compressibility gives the deviation from ideal gas. SPECIFIC GRAVITY Allowed range is from 0.5 to 1. INVERSION POINT Allowed range is from 0.3 to 0.9. The inversion point is the watercut that gives the maximum liquid viscosity. MAXIMUM RELATIVE LIQUID VISCOSITY
SheetHelp
Allowed range is from 1 to 100. This number gives the ratio between the liquid viscosity at the inversion point and the viscosity of pure oil.
RESULTS SHEAR STRESS The shear stress will be calculated on basis of the given input values. LIQUID VISCOSITY The liquid viscosity will be calculated on basis of given input values. The liquid viscosity will only be shown if the button called "Expert input" is pressed and all the input parameters are shown in the flow menu.
SheetHelp
THE PARAMETER STUDY MENU
OPTIONS RETURN Press this button to get back to the main menu. UPDATE CHART If you change a value in this menu, the chart will not be updated unless you press the update chart button. PRINT Press this button to print the chart as it is shown on the screen. SAVE Press this button to save the chart and a table with corresponding data in a separate Excel file. ZOOM BUTTONS Use these buttons to make the chart on the screen bigger or smaller. CHART TITLE If the default check box is turned on a default chart title will be used. Otherwise, any chart title may be given.
PARAMETERS 1. VARIABLE PARAMETER The 1. variable parameter represents the parameter at the x-axis on the chart. Temperature, pH, CO2 partial pressure and shear stress can be chosen as 1. variable parameter. If CO2 is given in mole% the pressure, and not the CO2 partial pressure, can be given as 1. variable parameter. RANGE VALUES The minimum and maximum range values represent the minimum and maximum values on the x-axis. 2. VARIABLE PARAMETER The 2. variable parameter represents the parameter witch is varied in the three lines in the chart. Temperature, pH, CO2 partial pressure and shear stress can be chosen as 2. variable parameter, but the 2. variable parameter can't be equal to the 1. variable parameter. If CO2 is given in mole% the pressure, and not the CO2 partial pressure, can be given as 2. variable parameter. THE FIRST, SECOND AND THIRD VALUES These data represent the values of the second parameter in the three different lines in the chart. OTHER INPUT PARAMETERS See help on main menu. UNITS It is not possible to change the units in the Parameter study menu. The units will be
SheetHelp
the same as in the Main menu, with exception of the CO2 amount if given as kmole/h. The CO2 amount will then be re-calculated to mole% CO2 in the Parameter Study menu.
SheetHelp
SheetHelp
THE ACCUMULATED CORROSION MENU
ACCUMULATED CORROSION Accumulated corrosion is corrosion given in mm as function of time. Accumulated corrosion in a line in the table shown on the screen is set equal to the accumulated corrosion in the line above plus the calculated corrosion rate in the actual line multiplied with the time difference between the two lines.
OPTIONS CALC pH Press this button to go to the pH calculation menu. CALC SHEAR Press this button to go to the shear stress calculation menu. ACC. OFF / ACC. ON Use this button to switch from accumulated corrosion (given in mm) actual corrosion (given in mm/year). SHOW CHART / SHOW TABLE Use this button to switch between a table with the results and a graphic presentation of the results. INSERT LINE Use this button to insert a new line with the given input values and a corresponding corrosion rate in the table. DELETE LINE Delete the data in the line specified in the menu. CLEAR TABLE Press this button to delete all the data in the table.
ZOOM BUTTONS Use these buttons to make the chart on the screen bigger or smaller. RETURN Press this button to get back to the main menu. The values in the table for accumulated corrosion will be lost if they have not been saved. PRINT Prints the data shown at the screen. If the table with data is shown, the table will be printed, and if the chart is shown, the chart will be printed. SAVE Save the table with the results. LOAD Load a previous saved table with accumulated corrosion data and recalculates the table.
SheetHelp
PARAMETERS LINE NUMBER Allowed range is from 1 to 50. The line number specifies the actual line in the table. If the button called "Insert line" is pressed, the data will be inserted in the line with the specified line number. If the button called "Delete line" is pressed, the data in the specified line number will be deleted. DATE Both start date and end date must be specified for each line with data. Dates are entered as month (three letters) - year (four numbers). Example: Feb-1998. OTHER PARAMETERS See help on main menu. UNITS It is not possible to change the units in the Accumulated corrosion menu. The units will be the same as in the Main menu.
SheetHelp
SheetHelp
THE pH MENU
OPTIONS UNITS Press the unit buttons to change the unit of bicarbonate, ionic strength, temperature, pressure and amount of CO2. CALCULATE Press this button to calculate the pH. CONDENSED / FORMATION WATER Choose condensed water or formation water. If conduced water is chosen both the bicarbonate concentration and the ionic strength will be set to 0 g/l. OK Press this button to get back to the main menu and use the calculated pH in the model. CANCEL Press this button to get back to the main menu without using the calculated pH. All the values in this menu will be restored. PRINT Press this button to print the input and output values. SAVE IN NEW FILE Press this button to save the input and output values in a separate Excel file. The data can either be saved in a new Excel file or a previous saved file can be loaded and then the saved data will be added to this file. SAVE IN CURRENT FILE Press this button to save the input and output values in the same file that has been used for saving values before. Values for the same parameters that have been saved in this file before will be saved.
SHOW CURRENT FILE Press this button to see the data that has been saved in the current file.
INPUT PARAMETERS PROJECT, EQUIPMENT, IDENTIFIER AND COMMENT The project name, equipment, identifier and any comments can be given. These names can be saved together with other data when the save buttons are pressed. It is not necessary to enter any text to these parameters. TEMPERATURE Allowed range is from 5 °C to 150 °C. The temperature can be given in °C or °F. TOTAL PRESSURE Allowed range is from given CO2 partial pressure to 1000 bar. if the CO2 partial pressure is below 1 bar, the minimum total pressure is 1 bar. The total pressure can be given in bar or psi.
SheetHelp
TOTAL MASS FLOW Allowed range is from 0.001 to 1000000 kmole/h. The total mass flow is required to calculate the CO2 partial pressure when the amount of CO2 is given in kmole/h. The total mass flow will therefore only be shown in the menu when kmole/h is chosen as the unit for the CO2 amount. CO2 Allowed range for the fugacity of CO2 is from 0 to 50 bar, but the CO2 pressure can not be higher than the given total pressure. It is possible to specify either the CO2 partial pressure or the CO2 fugacity by using the option called "Use as input: CO2 pressure or CO2 fugacity" in the main menu. The amount of CO2 can also be given in either bar, psi, mole% or kmole/h. BICARBONATE Allowed range is from 0 to 20000 mg/l. The concentration of bicarbonate can be given in mg/l or molar. The molecular weight of bicarbonate (HCO3-) is 61.02 g/mole. This means that 1 M bicarbonate equals 61.02 g bicarbonate/l. IONIC STRENGTH Allowed range is from 0 to 175 g/l. The ionic strength can be given in g/l or molar. When the ionic strength is given in g/l it is assumed that NaCl is the dominant specie in the solution. The molecular weight of NaCl is 58.44 g/mole. This means that an ionic strength of 1 M equals an ionic strength of 58.44 g/l.
RESULTS pH The pH will be calculated on basis of the given input values. For condensed water systems, the pH in a solution saturated with iron carbonate is also calculated.
SheetHelp
SheetHelp
THE SAVE MENU The save menu provides two different alternatives: 1. Save data in a new separate Excel file 2. Load a previous saved Excel file and add saved data to this file If it is wanted to save data in a new separate Excel file the parameters that are supposed to be saved must be turned on in this save menu. Click the button called "Create new file" when the desired parameters are turned on, and then the program will ask for the file name before the program returns to the previous shown menu. In this case the current data will be saved as the first set of data in the new file. If it is wanted to use a previous saved file to save new data the file can be loaded by pressing the Load button. In such cases it has no meaning to turn on or off any parameters in the save menu because the same parameters that have been saved in the loaded file earlier will still be saved in this file. When a file is loaded in this way the actual parameters will not be saved automatic. The data will only be saved by clicking the buttons called "Save in current file" in the different menus. Click the Cancel button to return to the previous menu without creating a new file or loading an old file.
THE SHOW MENU
RETURN Press this button to get back to the previous menu. PRINT Prints the data shown in the table at the screen. ZOOM BUTTONS Use these buttons to make the table on the screen bigger or smaller. SCROLL BARS Use the scroll bars to move the table up, down, left or right.
SheetHelp
SheetHelp
SheetHelp
THE HUMIDITY MENU
OPTIONS CALCULATE Press this button to calculate the relative humidity and the dew point. OK Press this button to get back to the main menu. CANCEL Press this button to get back to the main menu. All the values in this menu will be restored. PRINT Press this button to print the input and output values. SAVE IN NEW FILE Press this button to save the input and output values in a separate Excel file. The data can either be saved in a new Excel file or a previous saved file can be loaded and then the saved data will be added to this file. SAVE IN CURRENT FILE Press this button to save the input and output values in the same file that has been used for saving values before. Values for the same parameters that have been saved in this file before will be saved. SHOW CURRENT FILE Press this button to see the data that has been saved in the current file.
INPUT PARAMETERS PROJECT, EQUIPMENT, IDENTIFIER AND COMMENT The project name, equipment, identifier and any comments can be given. These names can be saved together with other data when the save buttons are pressed. It is not necessary to enter any text to these parameters. TEMPERATURE Allowed range is from -16 °C to 200 °C. The temperature can be given in °C or °F. TOTAL PRESSURE Allowed range is from 1 bar to 500 bar. The total pressure can be given in bar or psi. TOTAL MASS FLOW Allowed range is from 0.001 to 1000000 kmole/h. WATER MASS FLOW Allowed range is from 0.001 to 1000000 kmole/h.
RESULTS RELATIVE HUMIDITY
1
SheetHelp
The relative humidity given in percent will be calculated on basis of the given input values. The calculated humidity is only valid for pure water, that is water with no glycol. DEW POINT The dew point will be calculated for pure water on basis of the given input values.
NORSOK M-506
NORSOK M-506, CALCULATION OF ACCUMULATED CORROSION
Line no.
Start time
End time
Date
Date
Temperatur e Pressure Total flow °C
bar
kmole/h
CO2 kmole/h
CO2 fugacity
Shear Stress
bar
Pa
pH
Glycol conc. %
Inhibitor Corrosion Accumulated efficiency rate corrosion %
mm/year
mm
x
