Page 191 - International safety guide for oil tankers and terminals

ENCLOSED SPACES

10.11.4 Maintenance of Electrical Equipment in the Pumproom
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The integrity of the protection afforded by the design of explosion-proof
or intrinsically safe electrical equipment may be compromised by incorrect
maintenance procedures. Even the simplest of repair and maintenance
operations must be carried out in strict compliance with the
provided with detailed maintenance instructions for the specific systems์นาวี
manufacturer’s instructions in order to ensure that such equipment
remains in a safe condition.

Maintenance of explosion-proof and intrinsically safe equipment should
only be carried out by personnel qualified to undertake such work. This is
particularly relevant in the case of explosion-proof lights, where incorrect
งานห้องสมุด ศูนย์ฝกพาณิชย
closure after changing a lamp could compromise the integrity of the light.
In order to assist with such routine servicing and repair, ships should be

and arrangements as fitted on board.

10.11.5 Inspection and Maintenance of Pumproom
Ventilation Fans
Pumproom ventilation fans are required to operate by drawing air out of
the space. As a consequence, should gas be present in the pumproom,
the vapours will be drawn through the blades of the fan impeller and
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could be ignited if the blades contact the casing or if the fan bearings or
seals overheat.

Pumproom extractor fans, including impellers, shafts and gas seals,
should be inspected on a regular basis.

The condition of the fan trunking should be inspected and the proper
operation of changeover flaps and fire dampers confirmed.

Routine vibration monitoring and analysis should be considered as a
means for providing early detection of component wear.

10.11.6 Testing of Alarms and Trips
Pump alarms and trips, level alarms etc, where fitted, should be tested
regularly to ensure that they are functioning correctly, and the results of
these tests should be recorded.

These tests should be as thorough as possible to verify the full and
complete operability of the system and should not be limited to an
electrical function test of the alarm itself.

10.11.7 Miscellaneous
There are a number of other ways to enhance the safety of pumprooms,
some of which are mandatory for certain ships:
A fixed gas detection system capable of continuously monitoring for
the presence of hydrocarbon gas. Where such equipment is fitted,
procedures should be developed to ensure it is regularly inspected and
calibrated. Procedures should also be developed with regard to the
action to be taken in the event of an alarm occurring, especially for
vacating the space and stopping the cargo pumps. Whenever

© ICS/OCIMF/IAPH 2006 157