Page 426 - International safety guide for oil tankers and terminals

INTERNATIONAL SAFETY GUIDE FOR OIL TANKERS AND TERMINALS

Portable gas detection instruments, suitable for the products handled, capable
of measuring flammable and/or toxic levels, should be available.
---ใช้เพื่อการศึกษาเท่านั้น---
Portable instruments capable of measuring in the flammable range should be
operationally tested for the product to be handled before operations commence.
Where possible, ship and shore emergency shutdown systems should be testedย์นาวี
Calibration of instruments should be carried out in accordance with the Safety
Management System.

10. Cargo system gauges and alarms are correctly set and in good order.
Ship and shore cargo system gauges should be checked regularly to ensure
that they are in good working order.
In cases where it is possible to set alarms to different levels, the alarm should
งานห้องสมุด ศูนย์ฝกพาณิช
be set to the required level.
11. Emergency shutdown systems have been tested and are working properly.

before commencement of cargo transfer.

12. Ship and shore have informed each other of the closing rate of ESD valves,
automatic valves or similar devices.
Automatic shutdown valves may be fitted in the ship and the shore systems.
Among other parameters, the action of these valves can be automatically
initiated by a certain level being reached in the tank being loaded, either on
board or ashore. ึ

The closing rate of any automatic valves should be known and this information
should be exchanged.
Where automatic valves are fitted and used, the cargo handling rate should be
so adjusted that a pressure surge evolving from the automatic closure of any
such valve does not exceed the safe working pressure of either the ship or
shore pipeline systems.
Alternatively, means may be fitted to relieve the pressure surge created, such as
re-circulation systems and buffer tanks.
A written agreement should be made between the Responsible Officer and
Terminal Representative indicating whether the cargo handling rate will be
adjusted or alternative systems will be used. The safe cargo handling rate
should be noted in the agreement.

13. Information has been exchanged between ship and shore on the maximum/
minimum temperatures/pressures of the cargo to be handled.
Before operations commence, information should be exchanged between the
Responsible Office and Terminal Representatives on cargo
temperature/pressure requirements.
This information should be in writing.

14. Cargo tanks are protected against inadvertent overfilling at all times while any
cargo operations are in progress.
Automatic shutdown systems are normally designed to close the liquid valves,
and if discharging, to trip the cargo pumps, should the liquid level in any tank
rise above the maximum permitted level. This level must be accurately set and
the operation of the device should be tested at regular intervals.
If ship and shore shutdown systems are to be inter-connected, then their
operation must be checked before cargo transfer begins.

392 © ICS/OCIMF/IAPH 2006