(IV-7-3) General Safety

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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
Rules IV Industrial Services Part 7 Offshore Substations Chapter 3 General Safety Section 5 Access and Transfer F Helicopter Winching Facilities F.1 Winching operations F.1.1 For any fixed offshore installation or any mobile offshore unit, for which helicopters are a normal mode of transport of personnel, a helicopter landing area should be provided. Winching should not be adopted as a normal method of personnel transfer. F.1.2 If a regular delivery of supplies by winching, like provisions, spare parts, etc., is planned, measures for a convenient material flow from the winching area has to be provided. F.1.3 If winching operations are required, they shall be conducted in accordance with procedures agreed between the helicopter Operator, the Owner/ Operator of the offshore installation/unit and GL and shall be contained in the Operating Manual. F.2 Winching areas F.2.1 A winching area should, for operational effectiveness and safety, be located at the side or one end of an offshore installation/unit so that a large part of the maneuvering zone of the helicopter can extend outside the installation/ unit. The position of the operating area shall enable the pilot of the helicopter hovering over the winching area to have an unobstructed view of the installation/unit and be in position which will minimize the effect of air turbulence and flue gases. The area shall, as far as possible, be positioned clear of accommodation spaces, provide an adequate deck area for material and provide for safe access to the area from different directions. F.2.2 In selecting a winching area the desirability of keeping the winching height to a minimum shall also be borne in mind. In routine operations a winching height greater than 12 m shall be avoided. F.2.3 A winching area shall provide a “maneuvering zone” in which a clear zone shall be centered. The sizes of these areas are to be defined by the responsible national authority or flag state of the offshore installation/ unit. F.3 Winching above accommodation areas Some installation/units may only be able to provide winching areas which are situated above accommodation spaces. Due to the constraints of operating above such an area only twin-engine helicopters shall be used for such operations and the following procedures adhered to: • personnel shall be cleared from all spaces immediately below the helicopter operating area and from those spaces where the only means of escape is through the area immediately below the operating area • safe means of access to and escape from the operating area shall be provided by at least two independent routes • all doors, ports, skylights, etc. in the vicinity of the helicopter operating area shall be closed. This also applies to deck levels below the operating area. • fire and rescue parties shall be deployed in a ready state but sheltered from the helicopter operating are Edition 2013 Germanischer Lloyd Page 5–9
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(IV-7-3) General Safety

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