Page 319 - International safety guide for oil tankers and terminals

CARGO TRANSFER EQUIPMENT

Inside Diameter of Hose in Inches
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Size of
Tanker
20 16 12 10 8
500,000 DWT 16.4 11.4 8.2 6.6 4.7
งานห้องสมุด ศูนย์ฝกพาณิชย์นาวี
330,000 “ 13.6 9.4 6.8 5.4 3.9
270,000 “ 13.0 9.1 6.5 5.2 3.7
200,000 “ 12.5 8.7 6.2 5.0 3.6
100,000 “ 10.8 7.5 5.4 4.3 3.1
70,000 “ 10.0 7.1 5.1 4.1 2.9
50,000 “ 9.8 6.8 4.9 3.9 2.8
35,000 “ 9.4 6.5 4.7 3.7 2.7
18,000 “ 8.7 6.0 4.3 3.5 2.5

Table 18.4 – Weight of hose strings (in tonnes) for single buoy moorings
(See 18.2.13.1)

When the hose string has been lifted to the required height for connecting
to the manifold, and while it remains connected, the vertical section of the
hose string should be supported by hang-off chains or wires made fast to
a strong point on the ship’s deck.

In order to prevent spillage, precautions must be taken to ensure that,
prior to the removal of blanks from submarine or floating pipelines, the
ึ
section between the last valve and the blank does not contain oil under
pressure.
A visual inspection of each floating hose string should be made before
connecting it to the tanker manifold to determine if damage has been
caused by, for example, contact with other ships or crossed lines and for
possible kinking or oil seepage.

If any damage to the hose is found which is likely to affect its integrity, the
hose should be withdrawn from use to allow further inspection and repair.

18.2.13.1 Hose String Weights

Tables 18.3 and 18.4 give the approximate weights of hose
strings in tonnes (including fittings, floats and pick-up buoy)
with all hoses full of crude oil having a specific gravity of
0.850. The assumed lift is 7.5 metres above deck level, with
the tanker on light draught. These tables are for general
guidance only and terminals should check their own
arrangements.

18.3 Vapour Emission Control Systems

Some terminals are equipped with vapour emission control systems to receive and
process vapours displaced from a ship during loading operations. The terminal’s
operating manual should include a full description of the system and the
requirements for its safe operation. The terminal’s information booklet, passed to
visiting ships for information, should also include details of the vapour recovery
system for the information of visiting vessels.

All shore personnel in charge of transfer operations should complete a structured
training programme covering the particular vapour emission control system installed

© ICS/OCIMF/IAPH 2006 285