Page 258 - International safety guide for oil tankers and terminals

INTERNATIONAL SAFETY GUIDE FOR OIL TANKERS AND TERMINALS

The Master should ensure that the dangerous goods loaded in the ship
are properly stowed and segregated as recommended in the IMDG Code,
---ใช้เพื่อการศึกษาเท่านั้น---
taking into consideration, as appropriate, the IMO ‘Recommendations on
the Safe Transport of Dangerous Cargoes and Related Activities in Port
Areas’.
งานห้องสมุด ศูนย์ฝกพาณิชย์นาวี
12.5.2.1 Tetraethyl Lead (TEL) and Tetramethyl Lead
(TML)

These anti-knock chemicals may be carried in small quantities on
tankers as packaged cargo. Extreme care is necessary when
handling anti-knock compounds because of the toxic hazards
arising from skin contact or vapour inhalation. Before handling
packaged cargoes of TEL and TML, it is essential that the Master
is advised of the nature and properties of the substance and is
provided with an appropriate Material Safety Data Sheet (MSDS)
issued by the product’s manufacturer.

12.5.2.2 Additives (Antistatic, Inhibitors, Dyes, H S
2
Knockdown)
Additives for cargoes are frequently placed on board tankers in
small containers, for delivery with the cargo. In order that these
products can be stowed correctly, they should be accompanied by
ึ
the appropriate MSDS.

Additives are routinely added to cargoes in an activity often
described as either ‘dosing’ or ‘doping’. This is usually undertaken
ashore in well controlled and defined conditions. There are,
however, occasions when it is necessary for this to be performed
on board tankers. This is a non-standard and potentially
hazardous activity.

It is therefore preferred that doping of cargoes be carried out ‘in
line’ or in tanks ashore rather than on board the tanker.

However, where it is necessary to dope cargoes on a tanker, a
‘cargo doping plan’ should be drawn up by the supplier/contractor
and communicated to the Master before arrival in port. On receipt
of the plan, the Master should carry out a risk assessment and
satisfy himself that all relevant items have been addressed and
risks reduced to as low as reasonably practicable (ALARP). These
measures may require the use of additional personal protective
equipment. Finally, the supplier/contractor and Master should
discuss and agree on the plan for on board doping.

All parties involved in the stowage and handling of the additive
shall comply with the guidelines for the product, as detailed on the
MSDS.

12.5.3 Entry into Holds

Before entry into any hold which contains, or which has contained,
packaged petroleum and/or other flammable liquids, all the precautions
for entry into enclosed spaces should be taken (see Chapter 10).

224 © ICS/OCIMF/IAPH 2006