High Purity

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 (PTT-Test)
• UV spectrum passes

Depending on the purity of the cargo grade the required chloride standard can be much lower (e.g. 0,5 ppm).

If a low chloride standard is required tanks and lines should be finally rinsed/flushed with DI-water

Visual inspection of the tank and wall wash with Methanol to perform above tests.
Master to confirm that the on-board tests were conducted via a tank cleanliness certificate.

Visual inspection of tanks and wall wash.
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.