NORSOK m-506r2 (06-2005)

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 the CO2 corrosion rate on basis of given temperature, pH, CO2 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 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.

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Page 1

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 °C

Temperature Pressure Mole percent CO2 in gas Shear stress

Options

bar

Parameter study

mole%

Accumulated corrosion Calculate humidity

Pa

pH

Print

Glycol concentration

0

%

Save in new file / Load file

Inhibitor efficiency

0

%

Save in current file Show current file

Comment

Help Exit

CO2 fugacity

bar

Run the corrosion rate model Calculate corrosion rate

Output 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

Page 4

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

Diameter (ID)

Save in current file Show current file Expert input

%

11

mm

Comment Run Calculate Output Shear stress

Pa

Liquid viscosity

cp

Page 5

Help Other input Roughness

Default

50

µm

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

DialogFlow

kg/m³ kg/m³ kg/m³ cp cp cp

Page 6

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 pH in condensed water saturated with Fe2+

Page 7

Output

DialogBicarb

pH in condensed water saturated with Fe2+

Page 8

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,

Page 9

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

Zoom

DialogAcc

NORSOK M-506 Accumulated Corrosion Input Line number

1

CO2

1

bar

Start date

jan-2002

Shear stress

4

Pa

End date

des-2002

pH

4

Temperature

60

°C

Glycol conc.

0

%

Pressure

5

bar

Inhibitor eff.

0

%

Page 10

Options Calc pH

Insert line

Return

Calc shear

Delete line

Print

Acc. off

Clear table

Save

Show chart

Zoom in

Load

Help

Zoom out

DialogHelp

NORSOK M-506 Help Menu Helpmenu for the NORSOK M-506 user interface

OK

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.

Page 11

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

Page 12

Help

DialogSave

Help

ol effect

culated shear stress culated liquid viscosity

Page 13

DialogShow

Show Data Return Print Help Zoom in Zoom out

Page 14

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

Page 15

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

90 °C

0.671 0.603609

0.39016

Page 16

120 °C

0.1902

150 °C

0.0365

158732639.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 K CP 1.1 LIM SP.GR 0.8 Z 0.9 1.3336 Waterdensity 1024 1 869.14

L 1.53366

FLOW SMOOTH REGIME: PIPE LIQUID 623.557 YEARS TO FAILURE OF ST52 STEEL BY MESA ATTACK ************************************************************************************************ OBSTACLE 507.703 YEARS TO FAILURE

POSSIBLESTRAT 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 YEARS L-UNIT 0.22 M CANNOT EXEED: 12472.6 YEARS L-SLUG 0.22 M 4552486 DAYS TAUMEAN 4.34977 PA Taumean slug: 0.31161 TOO LOW ! V EQ 0.99998 NET TIME TO FAILURE:

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

18

CO2 fugacity bar 0.1 0.1 0.16

Shear stress Pa 10 10 10

Inhibitor efficiency

pH 5 5 5

% 0 0 0

7/18/2013

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 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

19

mm/year 0.83 0.7 0.93

7/18/2013

NORSOK M-506

Corrosion (mm/year) rate//(mm/year) Corrosionrate

Pressure CO2 pressure = 55 bar, = 1E-5 Shear bar, stress Shear = 64 stress Pa, =CO2 10 Pa, = 5 mole% 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 Accumulated corrosion / mm Corrosion rate / (mm/year)

1 1.2

0.9 1

0.8 0.7

0.8

0.6 0.5 0.6 0.4 0.3 0.2

0.4

0.2

0.1 0

0 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 CO2 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

CO2 pressure Shear stress Trykk Glycol concentration Inhibitor reduction factor

pH=3.5 4.427861 5.686505 6.945149 8.203793 8.65226 9.033212 9.414164 9.69586 9.959509 10.22316 8.602593 6.890631 6.758233 6.625835 6.493436 6.361038 5.980939 5.446028 4.911116 4.376205 3.841293

1 5 80 0 0

pH=4.5 3.616083 4.643975 5.671867 6.699759 7.156366 7.565365 7.974365 7.920688 7.782889 7.64509 6.189111 4.747182 4.67026 4.593339 4.516417 4.439496 3.917955 3.118527 2.319099 1.519671 0.720242

pH=5.5 1.884596 2.420303 2.95601 3.491717 3.369722 3.192918 3.016114 2.815738 2.611077 2.406415 1.482072 0.618993 0.679807 0.740621 0.801435 0.862249 0.786504 0.62541 0.464316 0.303222 0.142128

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 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 99 100 101 102 103 104

A Actual dialog number Recent dialog number Dialog to check the input

B

C

D

E F G H use pressure or fugacity 1 pressure in B9 Use of expertmenu1in dialog 1 flow

0 1 0

I

J

K

L

M

N

O

P

Q

INPUTPARAMETER VALUE lovlig inputny input hvis minkolonnemax C = FALSE unit choiseunit value in model unit units Old value in Old case unitof cancel Calculation of other parameters 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 trykk) 1 1 fugasity of CO2 in bar 0 fugasity in chosen unit 0 (in bar if mole% or flow is Shear stress FALSE 1 150 Pa 0 Pa 10 Trykk FALSE 1 1000 1 bar 0 bar 5 1 fugasitycoeffisient 1 Glycol concentration 0 TRUE 0 100 % (concentration) 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/day 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 lign for vanntetthet 1000 sfa T er gitt i celle Viskositet vann use default TRUE 1 0.17 1.1 1 cp 1 cp use default 1 Liquid viscositet 0 cp 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) 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

beregning av verdier for grafisk fremstilling Temperature pH=4 / (°C) pH=5 pH=6 20 0.00476 0.00389 0.00203 26.5 0.00611 0.00499 0.0026 33 0.00746 0.00609 0.00318 39.5 0.00881 0.0072 0.00375 46 0.0093 0.00769 3.62E-03 52.5 0.0097 0.00813 3.43E-03 59 0.01011 0.00857 3.24E-03 65.5 0.01042 0.00851 3.03E-03 72 0.0107 0.00836 2.81E-03 78.5 0.01098 0.00821 2.59E-03 85 0.00924 0.00665 1.59E-03 91.5 0.0074 0.0051 6.65E-04 98 0.00726 0.00502 7.30E-04 104.5 0.00712 0.00494 7.96E-04 111 0.00698 0.00485 8.61E-04 117.5 0.00683 0.00477 9.26E-04 124 0.00643 0.00421 8.45E-04 130.5 0.00585 0.00335 6.72E-04 137 0.00528 0.00249 4.99E-04 143.5 0.0047 0.00163 3.26E-04 150 0.00413 0.00077 1.53E-04

pH=4 pH=5 pH=6 0.004757 0.00389 0.00203 0.006109 0.00499 0.0026 0.007461 0.00609 0.00318 0.008813 0.0072 0.00375 0.009295 0.00769 0.00362 0.009704 0.00813 0.00343 0.010113 0.00857 0.00324 0.010416 0.00851 0.00303 0.010699 0.00836 0.00281 0.010983 0.00821 0.00259 0.009242 0.00665 0.00159 0.007402 0.0051 0.00067 0.00726 0.00502 0.00073 0.007118 0.00494 0.0008 0.006976 0.00485 0.00086 0.006834 0.00477 0.00093 0.006425 0.00421 0.00085 0.005851 0.00335 0.00067 0.005276 0.00249 0.0005 0.004701 0.00163 0.00033 0.004127 0.00077 0.00015

Opsjoner for grafisk fremstilling choise use velocity or shear stress

Parameter Unit 1 Shear stress Pa

Label on button Use default on DialogChart options velocity TRUE

chartlist 1 chartlist 2 Temperature pH pH Pressure Pressure Shear stress Shear stress

Valgt index Valgt parameter unit input in line line in model

1.parameter 2. parameter 3. parameter 4. parameter 1 1 Temperature pH Pressure Shear stress °C bar Pa 7 8 11 10 2 4 6 5

Range, min Range, max 1. value 2. value 3. value All legal

5 150 4 5 6

Lovlig TRUE TRUE TRUE TRUE TRUE TRUE

min

max

Default

5 3.5 3.5 3.5

Old value for first parameter 1

150 6.5 6.5 6.5

5 150 4.25 5 5.75

Value in model unit 5 150 4 5 6

Options for accumulated corrosion Show chart or table : Integrated chart or not :

1 Show Table 1 Integrated

Label on ButtonShow:Show chart Label on ButtonIntegrate: Acc. off

time,end Dec-2005 time,start Jan-2005 LineNumber legal time andTRUE line Min time legal line TRUE

1 1 0 Max time

Data saved 0 FALSE 73200 Accumulated dialog0activated FALSE

Options for calculation of pH INPUTPARAMETER Bicarbonate Ionic strenght

VALUE 0 0

lovlig input ny input hvis min kolonne C max = FALSEunit choiseunit TRUE 0 0 32000 2 mg/l TRUE 0 0 175 2 g/l

value in model unit units Old value inOld case unitof cancel 0 M 0 2 0 M 0 2

Use condenced water Saturated pH

1

TRUE

Options for calculation of maximum flow rate INPUTPARAMETER Ratio gas/liquid flow

VALUE lovlig input ny input hvis min kolonne C max = FALSE 0.00E+00 TRUE 0 0 1E+12

Options for saving and plotting data at main menu Parameter

Project

EquipmentIdentifier

Temperature Pressure Total massCO2 flow PartialMole Pressure % CO2 CO2 mass CO2 flow fugacity Shear stress pH

Inhibitor efficiency Glycol concentration Glycol reduction Superficial factorliquid velocity

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 B Saving status Default status Current dialog status Next line in sheet M506Data Units when saving

C D E F G H 1 1 1 1 1 0 1 1 1 1 1 0 2 default Saving macro turned 0 onFALSE Data saved yet 8 1 1

I 1 1 0

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

1.55E+01 bar C

max legal 0.001 1000000 FALSE 0.001 1000000 FALSE

all input legal 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 periode time / year Acc corr 1900 0

%

K 0 0

L 1 1

1

Shear stress calculations Max recommended shear stress Max recommended liquid superficial velocity m/s Max recommended gas superficial velocity m/s DialogHeight small

J

M 0 0

N 0 0

O 0 0

P 0 0

Q 0 0

0 0

R S T U V W X Y Z AA AB AC AD AE AF AG AH AI 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 1 93 94 95 96 97 98 99 100 101 102 103 104 Superficial Liquid gas velocity flowGas flow Diameter (ID) Watercut RoughnessSpesific gravity Compressibility Water density Oil density Gas densityW ater viscosity Oil viscosityGas viscosity Inovation point Max rel liq visc Liquid viscosity Bicarbonate

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 AK AL AM AN AO AP AQ AR AS AT AU AV AW AX AY AZ BA 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 99 100 101 102 103 104 Ionic strength Water mass Maximum flow superficial Maximum liquid superficial Maximum velocity, gas liquid Maximum C-steel velocityy, flowy,gas Maximum C-steel C-steel flowy, C-steel recommended Maximum superficial Maximum shear stress, liquid superficial Maximum velocity, C-steel gas liquid Maximum Cr0.5-steel velocityy, flowy,gas Maximum Cr0.5-steel Cr0.5-steel flowy, Cr0.5-steel recommended Regime Calculated shear stress, Calculated shearCr0.5-steel stress pH pH in solution Rel.saturated humidity Dew with point Fe2+

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 BC BD BE 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 99 100 101 102 103 104 Classification Corrosion in otherrate Corrosion systems rate Comment with inhibitor efficiency

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

10

%

Inhibitor efficiency

5

%

0.98

bar

OUTPUT CO2 fugacity Glycol reduction factor

0.8449

Corrosion rate

2.2

mm/year

Corrosion rate with inhibitor or glycol effect

1.9

mm/year

x

7/18/2013

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 Fe2+

3.9 5 x

7/18/2013

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

7/18/2013

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/m3

Oil density

850

kg/m3

Gas density

10.83

kg/m3

Water viscosity

0.5956

cp

Oil viscosity

1.1

cp

Gas viscosity

0.03

cp

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

7/18/2013

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:

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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.

The effect of inhibitor is given in percent inhibitor efficiency equals the value of th effect divided with the corrosion rate with no inhibitor effect on the calculation of th inhibitor efficiency.

RESULTS

FUGACITY The CO2 fugacity will be calculated base amount of CO2.

GLYCOL CORRECTION FACTOR The glycol correction factor will be calcu

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concentration. The glycol correction fact adjusted for the effect of glycol divided w effect.

CORROSION RATE WITHOUT GLYCO The calculated corrosion rate without an button called "Calculate corrosion rate" i

CORROSION RATE WITH GLYCOL OR The calculated corrosion rate with correc called "Calculate corrosion rate" is press effect of glycol, the corrosion rate with on effect of glycol is higher than the effect o glycol effect will be shown. If there is no rate without any correction factors will be

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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.

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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

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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.

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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

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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

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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.

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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

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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.

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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.

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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.

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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.

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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.

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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.

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THE HUMIDITY MENU

1

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

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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.

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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

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NORSOK M-506

NORSOK M-506, CALCULATION OF ACCUMULATED CORROSION

Line no.

Start time

End time

Temperature

Pressure

Date

Date

°C

bar

CO2 bar

CO2 fugacity

Shear Stress

bar

Pa

pH

Glycol conc.

Inhibitor efficiency

Corrosion rate

Accumulated corrosion

%

%

mm/year

mm

x

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