Page 216 - International safety guide for oil tankers and terminals

INTERNATIONAL SAFETY GUIDE FOR OIL TANKERS AND TERMINALS

The ship should carry out frequent inspections of the cargo deck
and pumproom to check for any leaks. Overside areas should
---ใช้เพื่อการศึกษาเท่านั้น---
likewise be checked regularly. During darkness, where safe and
practical, the water around the ship should be illuminated.

If ballasting of cargo tanks is carried out simultaneously with theย์นาวี
11.1.14.11 Fluctuations in Discharge Rate
During discharge, the flow of cargo should be controlled by the
tanker in accordance with the agreement reached with the
terminal.

The discharge rate should not be substantially changed without
informing the terminal.
ballasted, in which case proper precautions should be taken.ช
11.1.14.12 Simultaneous Ballast and Cargo Handling
งานห้องสมุด ศูนย์ฝกพาณิ
discharge of cargo, vapours may be emitted from the tanks being

Section 11.5.8 should be referred to for guidance on the control of
emissions during and after crude oil washing.

11.1.14.13 Failure of the Inert Gas System During
Cargo Discharge ึ
Reference should be made to the guidance provided in Section
7.1.12 regarding actions to be taken in the event of failure of the
inert gas system during cargo discharge.

11.1.14.14 Stripping and Draining of Cargo Tanks
If, during the discharge of the main bulk of cargo, a slop tank or
other selected tank is used to receive the drainings of tanks being
stripped, personnel should be alert to the fact that the ullage in
the receiving tank will be decreasing. In these circumstances,
great care should be taken to avoid an overflow and proper
precautions taken in respect of any vapours emitted.

As air and/or gas bubbles in a liquid can generate static electricity,
stripping pumps and eductors should be operated to avoid, as far
as possible, the entrapment of air or gas into the liquid stream.

11.1.15 Pipeline and Hose Clearing Following Cargo
Operations

11.1.15.1 General
The procedure for clearing the pipelines and hoses or arms
between the shore valve and ship’s manifold will depend on the
facilities available and whether these include a slop tank or other
receptacle. The relative heights of the ship and shore manifolds
may also influence procedures.

11.1.15.2 Line Displacement with Water
On tankers that have a segregated ballast system, the practice of
using cargo pumps on a sea suction should be avoided if at all

182 © ICS/OCIMF/IAPH 2006