Below is a listing of all the product resistance notes associated with Jotun coatings. To view the contents of each note, simply click on the note title or the "Show Details" text. To hide the note contents, either click the note title or the "Hide Details" text.

1A) AGGRESSIVE CARGOES (Show Details...)   

These cargoes can cause slight softening and swelling of the coating system. The coating will however recover hardness as the cargo evaporates from the coating, after unloading. The stowage time for these cargoes must not exceed 60 days. After unloading of these cargoes, the tanks should not be brought into contact with water or steam before the coating is restored to its original condition. This may be obtained by ventilating the tank with dry air until it is in a steady state gas-free condition. After ventilation, loading of further R1, R2, R16 or R18 cargoes, aqueous cargoes, or ballast water, or further cleaning with (sea)water cannot take place within 30 days for Tankguard HB, 20 days for Tankguard HB Classic, 10 days for Tankguard Special and Tankguard Special Ultra. If a hot cure has been carried out for Tankguard Special Ultra the recovery time can be reduced to 5 days.

 

R1A cargoes must not be carried until the coating has been in service for three (3) months (3 months after the carriage of first cargo), carrying unrestricted (R) cargoes only, or after a hot cure is done. (Please refer to General notes).




Last Edit: Nov 08, 2017  
1B) AGGRESSIVE CARGOES (Show Details...)   

These cargoes can cause slight softening and swelling of the coating system. The coating will however recover hardness as the cargo evaporates from the coating, after unloading. The stowage time for these cargoes must not exceed 90 days. After unloading of these cargoes, the tanks should not be brought into contact with water or steam before the coating is restored to its original condition. This may be obtained by ventilating the tank with dry air until it is in a steady state gas-free condition. After ventilation, loading of further R1, R2, R16 or R18 cargoes, aqueous cargoes, or ballast water, or further cleaning with (sea)water cannot take place within 30 days for Tankguard HB, 20 days for Tankguard HB Classic, 10 days for Tankguard Special and Tankguard Special Ultra. If a hot cure has been carried out for Tankguard Special Ultra the recovery time can be reduced to 5 days.

 

R1B cargoes must not be carried until the coating has been in service for three (3) months (3 months after the carriage of first cargo), carrying unrestricted (R) cargoes only, or after a hot cure is done. (Please refer to General notes).



Last Edit: Nov 08, 2017  
2) VERY AGGRESSIVE CARGOES (Show Details...)   

These cargoes can cause moderate softening and swelling of the coating system. The coating will however recover hardness as the cargo evaporates from the coating, after unloading. The stowage time for these cargoes must not exceed 30 days. After unloading of these cargoes, the tanks should not be brought into contact with water or steam before the coating is restored to its original condition. This may be obtained by ventilating the tank with dry air until it is in a steady state gas-free condition. After ventilation, loading of further R1, R2, R16 or R18 cargoes, aqueous cargoes, or ballast water, or further cleaning with (sea)water cannot take place within 30 days for Tankguard HB, 20 days for Tankguard HB Classic, 10 days for Tankguard Special and Tankguard Special Ultra. If a hot cure has been carried out for Tankguard Special Ultra the recovery time can be reduced to 5 days.

 

R2 cargoes must not be carried until the coating has been in service for three (3) months (3 months after the carriage of first cargo), carrying unrestricted (R) cargoes only, or after a hot cure is done. (Please refer to General notes)



Last Edit: Nov 08, 2017  
3) ANIMAL OILS, VEGETABLE OILS, FATS AND DERIVATIVES (Show Details...)   
These cargoes contain varying amounts of Free Fatty Acids (FFA), depending on type, origin, age, and quality of oil.  Solid or semi-solid types such as Palm Oil, Tallow (Lard), are transported at elevated temperatures to facilitate cargo handling. Excessively high temperatures and/or prolonged heating can cause an increase in FFA content, especially in the region around heating coils, and in heat exchangers.

The Free Fatty Acid (FFA) content of oils is usually expressed as % FFA, and is measured according to ASTM D – 1980.  In accordance with ASTM D – 1980 the amount of FFA in an oil is expressed as its “Acid Value”.  Acid value is approximately equal to 2 X the % FFA.  For example oil with an Acid Value of 5 will have a % FFA of approximately 2.5.  The maximum acceptable levels of FFA’s for JOTUN cargo tank coatings are as follows:

Cargo Tank Coating Maximum Acceptable Acid Value (ASTM D-1980) Approximate %FFA
Tankguard Zinc 4 2%
Tankguard CPC 30 15%
Tankguard HB 30
15%
Tankguard HB Classic 30
15%
Tankguard Special
80 40%
Tankguard Special Ultra No Limit 100%


The water contained in the oil must not exceed 1% as water may increase the FFA level above the maximum limits (N.A. for Tankguard Special Ultra) and no free mineral acid content is permitted.

Certain vegetable oil derivatives such as Fatty Acid Distillates and Acid Oils have been known to contain traces of mineral acids, and well as water, and free fatty acids. They are very aggressive towards coating systems. These products may only be carried provided specific approval has been given by JOTUN. Please contact your local Jotun office for further information. 

End users are advised to consult FOSFA, NIOP Rules and Qualifications, and EC Regulations concerning FFA levels, and prior cargoes, when transporting oils in coated tanks.



Last Edit: Nov 08, 2017  
4) HYDROLYSABLE CARGOES AND AMINES (Show Details...)   

Esters, Chlorinated or Brominated compounds, amine cargoes and others will react with any moisture present to form aggressive by-products, which will attack the coating and/or carbon steel. Such cargoes must therefore be free from moisture and be carried in completely dry tanks, which are protected against water ingression.


The water content of these cargoes must not exceed 0.02% (200ppm).


After unloading these cargoes the tank should be cleaned in accordance with the procedure detailed in General notes. 



Last Edit: Nov 08, 2017  
5) CRUDE OIL and CRUDE OIL DERIVATIVES (Show Details...)   

Crude Oil and Fuel Oil may contain variable amounts of acidic materials, which may be detrimental to Tankguard Zinc. 


The maximum acceptable Neutralisation Number (ASTM D – 664) for these cargoes is 0.4.



Last Edit: Nov 08, 2017  
7) UNLEADED GASOLINE (Show Details...)   

Many unleaded gasoline products may have considerable amounts of oxygenated solvents added to them to improve their combustion characteristics. Methyl tert-butyl ether (MTBE) and ethyl alcohol are common additives to gasoline.

1.   The coating is fully compatible with unleaded gasoline containing MTBE as the sole oxygenated additive, provided the concentration is less than 20% by volume.

2.   The coating is fully compatible with unleaded gasoline containing ethyl alcohol (ethanol) as the sole oxygenated additive, for concentrations up to 99% by volume when carried in accordance with Specific note 1A.

3.   The coating is fully compatible with unleaded gasoline containing methyl alcohol (methanol) as the sole oxygenated additive, for concentrations up to 20% by volume when carried in accordance with Specific note 1A.

4.   The coating is fully compatible with unleaded gasoline containing isopropyl alcohol (isopropanol) as the sole oxygenated additive, for concentrations up to 20% by volume when carried in accordance with Specific note 1A.

For unleaded gasoline containing additives different to the above, different concentrations,or mixtures, JOTUN must be consulted for specific advice.



Last Edit: Nov 08, 2017  
8) COATING DISCOLOURATION (Show Details...)   
The coating may be discoloured by this cargo. The discolouration will not affect the resistance of the coating, but may make tank cleaning more difficult, and also increase the risk of contaminating subsequent cargoes. See also General notes. 

Last Edit: Nov 08, 2017  
9) ZINC PICK-UP (Show Details...)   

Certain cargoes are very sensitive to the presence of zinc particles, which could possibly be picked up during transportation in zinc coated tanks. Small particles of zinc picked up by the cargo will have no effect on the Tankguard Zinc, but may affect the quality of the cargo.



Last Edit: Nov 08, 2017  
11) pH SENSITIVE CARGOES (Show Details...)   

Products in this class can be transported, provided that the pH is within the range 5.5 - 10.0.



Last Edit: Nov 08, 2017  
12) MOLASSES (Show Details...)   

Molasses may be carried in tanks coated with Tankguard Zinc if the pH of the cargo is between 5.5 – 10.0.  The pH of molasses may decrease during transportation due to fermentation. After unloading molasses, tanks should be washed with hot seawater, flushed with fresh water, and then lightly steamed. Any residual water after steaming must be neutral. The tank should then be drained, mopped out, and finally ventilated to a dry condition.



Last Edit: Nov 08, 2017  
14) PHENOL & CRESOLS (Show Details...)   

Tankguard Zinc is resistant to Phenol and Cresols provided the coating has been in service for at least 3 months.



Last Edit: Nov 08, 2017  
16) EXTREMELY AGGRESSIVE CARGOES (Show Details...)   

These cargoes can cause moderate softening and swelling of the coating system. However, the coating will recover hardness as the cargo evaporates from the coating, after unloading. The stowage time for these cargoes must generally not exceed 30 days (with the exception of 1,2-dichloroethane (EDC) and Acrylonitrile, where 60 days stowage can be accepted, for Tankguard Special Ultra only). After unloading of these cargoes, the tanks should not be brought into contact with water or steam before the coating is restored to its original condition. This may be obtained by ventilating the tank with dry air until it is in a steady state gas-free condition. After ventilation, loading of further R1, R2, R16 or R18 cargoes, aqueous cargoes, or ballast water, or further cleaning with (sea)water cannot take place within 10 days for Tankguard Special and 5 days for Tankguard Special Ultra.

For Tankguard Special Ultra only, after unloading of acrylonitrile, the tank may be flushed with water in order to reduce the cargo vapour content of the tank. The flush water must be removed, in its entirety, within 30 minutes.

Methyl alcohol (Methanol) cargo must be pure (contamination with acetaldehyde, formaldehyde, formic acid, acetone and acetic acid should be below 30 ppm per contaminant). The Methyl alcohol should be "water free" (maximum permissible water 0.020 % or 200 ppm). Samples of the Methyl alcohol must be taken prior to both loading and discharge. The sample has to be sealed, properly marked and dated and retained on board for a minimum of 6 months after discharge of the Methyl alcohol cargo.

 

Prior to carriage of these cargoes, the coating must be hot cured within 3 months in service (3 months after the carriage of first cargo) whilst carrying unrestricted (R) cargoes only. (Please refer to General notes).

 

Hot cure must be carried out for these cargoes, and cannot be substituted by post curing, i.e. three (3) months in service.



Last Edit: Nov 08, 2017  
18) TANKGUARD SPECIAL ULTRA; METHYL ALCOHOL AND VINYL ACETATE (Show Details...)   

These cargoes can cause moderate softening and swelling of the coating system. The coating will, however, recover hardness as the cargo evaporates from the coating, after unloading. After unloading of methyl alcohol the tank may be flushed with water in order to reduce the cargo vapor content of the tank. The flush water must be removed in its entirety within 30 minutes. Before subsequent loading of further R1, R2, R16 or R18 cargoes, aqueous cargoes, or ballast water, or further cleaning with (sea)water the tank must be ventilated with dry air until it is in a steady state gas-free condition and restored to its original condition. Any of these cargoes shall not be loaded until after 5 days of ventilation.

 

Methyl alcohol (Methanol) cargo must be pure (contamination with acetaldehyde, formaldehyde, formic acid, acetone and acetic acid should be below 150 ppm per contaminant). Methyl alcohol should be "water free" (maximum permissible water 0.10 % or 1000 ppm). Samples of the Methyl alcohol must be taken prior to both loading and discharge. The sample has to be sealed, properly marked and dated and retained on board for a minimum of 6 months after discharge of the Methyl alcohol cargo.

 

Prior to carriage of these cargoes, the coating must be hot cured within 3 months in service (3 months after the carriage of first cargo) whilst carrying unrestricted (R) cargoes only. (Please refer to General notes).

 

Hot cure must be carried out for these cargoes, and cannot be substituted by post curing, i.e. three (3) months in service.

If a hot cure is not carried out, note 2 applies.



Last Edit: Nov 08, 2017  


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