MDI / PMDI / MMDI
Most owners / operators of chemical tankers that are able to carry such products will already have procedures in place for the handling of these chemicals. The most important item is to ensure that the tanks, lines and pumps are completely free of any moisture, purging with nitrogen to a dewpoint of -40C being the most common method of ensuring this requirement. However, there are cases where moisture has entered the tank, causing polymerisation with dried residues remaining on the…