Page 27 - International safety guide for oil tankers and terminals

DEFINITIONS

Flame-proof
See ‘Explosion-proof’.
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Flame screen
A portable or fitted device incorporating one or more corrosion resistant wire-woven
งานห้องสมุด ศูนย์ฝกพาณิชย์นาวี
fabrics of very small mesh, which is used for preventing sparks from entering a tank or
vent opening or, for a short time, preventing the passage of flame. (Not to be confused
with ‘Flame arrester’.)

Flammable (also referred to as ‘Combustible’)
Capable of being ignited and of burning. For the purposes of this Guide, the terms
‘flammable’ and ‘combustible’ are synonymous.

Flammable range (also referred to as ‘Explosive range’)
The range of hydrocarbon gas concentrations in air between the Lower and Upper
Flammable (explosive) Limits. Mixtures within this range are capable of being ignited
and of burning.

Flashlight
See ‘Torch’.

Flashpoint
The lowest temperature at which a liquid gives off sufficient gas to form a flammable
gas mixture near the surface of the liquid. It is measured in a laboratory in standard
apparatus using a prescribed procedure.

Flow rate ึ
The linear velocity of flow of liquid in a pipeline, usually measured in metres per second
(m/s). The determination of the flow rates at locations within cargo pipeline systems is
essential when handling static accumulator cargoes.

Foam (also referred to as ‘Froth’)
An aerated solution that is used for fire prevention and fire-fighting.

Foam concentrate (also referred to as ‘Foam compound’)
The full strength liquid received from the supplier which is diluted and processed to
produce foam.

Foam solution
The mixture produced by diluting foam concentrate with water before processing to
make foam.

Free fall
The unrestricted fall of liquid into a tank.

From the top, or Overall
See ‘Loading over the top’.

Froth
See ‘Foam’.

Gas free
A tank, compartment or container is gas free when sufficient fresh air has been
introduced into it to lower the level of any flammable, toxic or inert gas to that required
for a specific purpose, e.g. Hot Work, entry etc.

Gas free certificate
A certificate issued by an authorised Responsible Person confirming that, at the time of
testing, a tank, compartment or container was gas free for a specific purpose.

© ICS/OCIMF/IAPH 2006 xxvii