Page 307 - International safety guide for oil tankers and terminals

CARGO TRANSFER EQUIPMENT

18.1.7 Wind Forces
การศึกษาเท่านั้น---
Wind loading of metal arms may place an excessive strain on the tanker
manifolds, as well as on the arms, and the terminal should establish
appropriate wind limits for operation. At terminals where wind loading is
critical, a close watch should be kept on wind speed and direction. If wind
manually operated arms, consideration should be given to fitting twoย์นาวี
limits are approached, operations should be suspended and the arms
should be drained and disconnected.

18.1.8 Precautions when Connecting and
Disconnecting Arms

Due to the risk of unexpected movements of both powered and
งานห้องสมุด ศูนย์ฝกพาณิช
unpowered arms during connection and disconnection, operators should
ensure that all personnel stand well clear of moving arms and do not
stand between a moving arm and the ship’s structure. When connecting

lanyards to control the movement of the connection end.

18.1.9 Precautions while Arms are Connected
The following precautions should be taken during the period that cargo
arms are connected:
ึ
The ship’s moorings should be monitored frequently by ship and shore
personnel and tended as necessary, so that any movement of the ship
is restricted to within the operating envelope of the metal arm.
---ใช้เพื่อ
If drift or range alarms are activated, all transfer operations should be
stopped and remedial measures taken.
The arms should be free to move with the motion of the ship. Care
should be taken to ensure that hydraulic or mechanical locks cannot
be inadvertently engaged.

The arms should not foul each other.
Excessive vibration should be avoided.

18.1.10 Powered Emergency Release Couplings (PERCs)

A Powered Emergency Release Coupling (PERC) is a hydraulically
operated device to provide quick disconnection of a marine loading arm
in an emergency, or when the operating envelope of a loading arm is
exceeded. It has a valve on each side of the release point to minimise
spillage. On release, the lower part of the coupling and its attendant valve
remain attached to the ship’s manifold while the upper part and its
attendant valve remain attached to the cargo arm, which is then free to
rise clear of the ship.

The Emergency Release System (ERS) is initiated in the following ways:

Automatically, when the arm reaches the specified limit; alarms usually
sound.

Manually, using a push button on the central control panel.
Manually, using hydraulic valves in the event of loss of electrical power
supply ashore.

© ICS/OCIMF/IAPH 2006 273