(IV-7-3) General Safety

Rules IV Industrial Services
Part 7 Offshore Substations
Chapter 3 General Safety
Section 5
Access and Transfer
• a foam application system consisting of monitors or foam-making branch pipes capable of delivering
foam to all parts of the helideck in all weather conditions in which the helideck is intended to be
available for helicopter operations. The minimum capacity of the foam production system will depend
upon the size of the area to be protected, the foam application rate, the discharge rates of installed
equipment and the expected duration of application:
• a minimum application rate of 6 l/m2 within a circle having a diameter equal to the D-value;
• a minimum of 5 min discharge capability should be provided;
• foam delivery at the minimum application rate should start within 30 s of system activation;
• at least two nozzles of an approved dual-purpose type (jet/spray) and hoses sufficient to reach any
part of the helideck;
• in addition to the provisions in Section 8, H.2, two fire-fighter’s outfits; and other equipment should
be stored in a manner that provides for immediate use and protection from the elements, see requirements
of helideck regulations.
E.5 Drainage
Drainage facilities in way of helidecks should be:
• constructed of steel or other arrangements providing equivalent fire safety;
• lead directly overboard independent of any other system; and
• designed so that drainage does not fall onto any part of the unit.
E.6 Helicopter refueling
Where the unit has helicopter refueling, national regulations and the following provisions should be complied
with:
• A designated area should be provided for the storage of fuel tanks which should be as remote as is
practicable from accommodation spaces, escape routes and embarkation stations; and isolated from
areas containing a source of vapor ignition;
E.6.1 The fuel storage area should be provided with arrangements whereby fuel spillage may be
collected and drained to a safe location; tanks and associated equipment should be protected against
physical damage and from a fire in an adjacent space or area;
E.6.2 Where portable fuel storage tanks are used, special attention should be given to:
• design of the tank for its intended purpose;
• mounting and securing arrangements;
• electric bonding; and
• inspection procedures;
E.6.3 Storage tank fuel pumps should be provided with means which permit shutdown from a safe
remote location in the event of a fire. Where a gravity-fuelling system is installed, equivalent closing arrangements
should be provided to isolate the fuel source;
E.6.4 The fuel pumping unit should be connected to one tank at a time. The piping between the tank
and the pumping unit should be of steel or equivalent material, as short as possible, and protected
against damage;
E.6.5 Electrical fuel pumping units and associated control equipment should be of a type suitable for
the location and potential hazards;
E.6.6 Fuel pumping units should incorporate a device which will prevent over-pressurization of the
delivery or filling hose;
E.6.7
E.6.8
Equipment used in refueling operations should be electrically bonded;
“NO SMOKING” signs should be displayed at appropriate locations.
Edition 2013 Germanischer Lloyd Page 5–8