Stripping Cargo Tanks and Demurrage
This post first appeared in the September 2013 Asdem Newsletter. To see this Newsletter please go to www.asdem.co.uk and look for the ‘Newsletters’ tab
Stripping cargo tanks is carried out to ensure that as much cargo as possible is discharged. Normally the vessel will use stripping pumps and lines for this purpose as they will reach the last drop of cargo that the bulk discharge pumps cannot reach. Stripping is an integral part of the discharge and if carried out properly should cause little delay to the vessel. Normally, the discharge plan will see the ship’s tanks discharged in a certain order. As soon as the first tanks become empty stripping can commence. Stripping can be carried out whilst the vessel is bulk discharging the remainder of the tanks and as the next tanks become empty, stripping of those tanks will tanks will begin. It is only at the end of bulk discharge that there will be a period of time when the vessel is only carrying out stripping. The bulk discharge is finished but the last two or three tanks to be discharged now need to be stripped. Clearly as there is no bulk discharge, it is impossible for the vessel to meet the back pressure required under the charter party of, say, 100psi.