Standards
Cleaning standards in MIRACLE recipes - See slide show below
Cleanning Standards INTERTANKO
| No. | Name | Definition | Test | On-board test conducted by ship’s crew |
Comments/description |
| 1 | Visually Clean Standard |
Clean, dry and visually free of residues of previous cargo and/or foreign matter, no uncharacteristic odour. |
NA | In-tank inspection – Dry, and visually free of residues of previous cargo and/or foreign matter, no uncharacteristic odour. |
Master to confirm that the on-board tests were conducted via a tank cleanliness certificate. Tanks should only be inspected from deck level, no wall-wash to be taken. |
| 2 | Water White Standard |
Dry, odour-free, free of visual residues of previous cargoes and/or foreign matter. Colour test: Wall-wash with suitable solvent shows: • colour PtCo (ASTM D 1209) 15 or less1 |
WWM WWA WsW |
In-tank inspection – Dry, odour-free, free of visual residues of previous cargoes and/ or foreign matter. Colour test: Wall wash with suitable solvent shows: • colour PtCo (ASTM D 1209) 15 or less1 |
Master will confirm that the on-board tests were conducted via a tank cleanliness certificate. Charterer may choose not to conduct in-tank inspections for wall wash (colour test). |
| 3 | High-Purity Standard |
Dry, odour-free, free of visual residues + wall-wash with methanol conforms to: • Water miscibility test (ASTM D 1722) passes • Colour PtCo (ASTM D 1209) or APHA 10 or less • Chlorides less than 2 ppm • Permanganate time test above 50 min • UV spectrum passes |
WWM WWA WsW |
In-tank inspection – Dry, odour-free, free of visual residues + wall-wash with methanol conforms to: • Water miscibility test (ASTM D 1722) passes • colour PtCo (ASTM D 1209) or APHA 10 or less • Chlorides less than 2 ppm • Permanganate time test above 50 min • UV spectrum passes4 Less than 100ppm5 of last cargo in final washwater |
This is the most commonly used standard for the carriage of methanol as a cargo. Master will confirm that the on-board tests were conducted via a tank cleanliness certificate. Charterer may accept the cleanliness certificate provided by the master or may require an internal visual inspection and a wall-wash test. This should be pre-agreed with the charterer/shipper. |
| 4 | Ultra-High Purity Standard |
Dry, odour-free, free of visual residues + wall-wash with methanol conforms to: • Water miscibility test (ASTM D 1722) passes • colour PtCo (ASTM D 1209) or APHA 10 or less • Chlorides less than 2 ppm • Permanganate time test above 50 min • UV spectrum passes • Non-volatile matter less than 10 ppm • Last cargo by Gas Chromatography or other suitable method less than 2 ppm |
WWM WWA WsW |
In-tank inspection – Dry, odour-free, free of visual residues + wall-wash with methanol conforms to: • Water miscibility test (ASTM D 1722) passes • colour PtCo (ASTM D 1209) or APHA 10 or less • Chlorides less than 2 ppm • Permanganate time test above 50 min • UV spectrum passes4 Less than 100ppm5 of last cargo in final washwater |
This standard is used for the carriage of extremely high-spec cargoes that require a higher level of cleanliness than that required for the carriage of methanol. Master will confirm that the on-board tests were conducted via a tank cleanliness certificate. Charterer may accept the cleanliness certificate provided by the Master, but will most likely require an in-tank inspection and wall-wash test. |
WWM Wall Wash test using Methanol
WWA Wall Wash Test using Acetone
WsW Washing Water Test