Maximum relative liquid viscosity 7.06
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.
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.
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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.
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.
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.
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.
NORSOK M-506
NORSOK M-506, CALCULATION OF ACCUMULATED CORROSION
Line
no. Start time End time
Temperatur
e Pressure Total flow CO2
CO2 fugacity
Shear Stress pH
Glycol conc.
Inhibitor efficiency
Corrosion rate
Accumulated corrosion
Date Date °C bar kmole/h kmole/h bar Pa % % mm/year mm
x
7/18/2013
NORSOK M-506
NORSOK M-506, CALCULATION OF ACCUMULATED CORROSION
Line
no. Start time End time Temperature Pressure CO2
CO2 fugacity
Shear
Stress pH Glycol conc.
Inhibitor efficiency
Corrosion rate
Accumulated corrosion
Date Date °C bar bar bar Pa % % mm/year mm
x