Page 251 - International safety guide for oil tankers and terminals

SHIPBOARD OPERATIONS

11.9.4 Ship-to-Ship Transfers Using Terminal Facilities
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Where a tanker at a berth is transferring cargo to a tanker at another
berth through the shore manifolds and pipelines, the two tankers and the
terminal should comply with all regulations relating to ship-to-shore
transfers, including written operating arrangements and communications
However, when transferring static accumulator oils, it is essential thatย์นาวี
procedures. The co-operation of the terminal in establishing these
arrangements and procedures is essential.

11.9.5 Ship-to-Ship Electric Currents
The principles for controlling arcing during ship-to-ship transfer operations
are the same as in ship-to-shore operations.
งานห้องสมุด ศูนย์ฝกพาณิช
In ships dedicated to ship-to-ship transfers, an insulating flange or a
single non-conducting length of hose should be used in the hose string.

these measures are not taken by both ships, leaving an insulated
conductor between them upon which an electrostatic charge could
accumulate. For the same reason, when such a dedicated ship is involved
in ship-to-shore cargo transfers, care should be taken to ensure that there
is no insulated conductor between the ship and shore through, for
example, the use of two insulating flanges on one line.

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In the absence of a positive means of isolation between the ships, the
electrical potential between them should be reduced as much as possible.
If both have properly functioning impressed current cathodic protection
systems, this is probably best achieved by leaving them running.
Likewise, if one has an impressed system and the other a sacrificial
system, the former should remain in operation.

However, if one of the ships is without cathodic protection, or its
impressed system has broken down, consideration should be given to
switching off the impressed system on the other ship well before the two
ships come together.

© ICS/OCIMF/IAPH 2006 217