Section 8 Ship specific requirements
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules for the Winterisation of Ships, July 2022 - Chapter 1 Rules for the Winterisation of Ships - Section 8 Ship specific requirements

Section 8 Ship specific requirements

Parent topic: Chapter 1 Rules for the Winterisation of Ships

8.1 General

8.1.1 In addition to the requirements in Ch 1, 4 Materials for equipment and components at low temperatures enhanced – Winterisation MEn, Ch 1, 5 Equipment and systems – Winterisation C and Ch 1, 6 Equipment and systems – Winterisation B, the following requirements are to be complied with, as appropriate.

8.2 Winterisation of oil and/or chemical tankers

8.2.1 Arrangements are to be provided to protect against cargo fluids within exposed pipes from freezing. For Winterisation A(t) and Winterisation B(t) , as stated in the Certificate of Fitness Cargo List and Notes, the exposed deck cargo and stripping lines are to be fitted with thermal insulation and suitable trace heating arrangements.

8.2.2 Arrangements are to be provided to protect cargo fluids within exposed small bore pipes against freezing. Measures are to be provided for exposed cargo drain and pressure gauge lines. They are to be protected against freezing and exposed lines are to be provided with heating arrangements.

8.2.3 Where exposed inert gas components such as the deck seal and pressure/vacuum breakers are fitted, measures are to be provided to protect liquid-filled components against freezing. Provision is to be made for heating arrangements or the use of suitable anti-freeze. Components are to be readily accessible and grouped together as far as practicable, to assist in ice removal. In addition, the deck seal is to be provided with heating arrangements. Heating arrangements and insulation are to be provided for exposed water supply and discharge lines to the deck water seal, or thermally insulated with continuous circulation. Thermal insulation is to be provided for drainage lines. The non-return valve for the deck water seal is to be provided with suitable drainage and a manual control/handle for testing. For Winterisation A(t) and B(t) , the pressure/vacuum breakers are to be suitable for the external design air temperature and/or provided with heating arrangements. The cooling water system for inert gas scrubber pumps is to be provided with suitable arrangements to protect against freezing, see Ch 1, 5.3 Winterisation of main propulsion and essential auxiliary engines 5.3.2.

8.2.4 In conjunction with Table 1.3.1 List of equipment and components, the heating requirements in Table 1.8.1 Space heating arrangements for oil and/or chemical tankers are to be complied with.

Table 1.8.1 Space heating arrangements for oil and/or chemical tankers

Space Heating arrangements Alarm, see Note 1
Cargo control room Fixed, see Note 2 X
Cargo pump-room Multiple fixed steam type X
Compressor and motor rooms (where fitted) Multiple fixed X

Note 1. Monitoring arrangements are to be provided that will activate an alarm in accordance with the alarm system required by Pt 6, Ch 1, 2 Essential features for control, alarm, monitoring and safety systems of the Rules and Regulations for the Classification of Ships, July 2022 to allow responsible personnel to reinstate heating in the event of a failure.

Note 2. A portable heater may be accepted for Winterisation C(t).

8.2.5 Ice removal measures are to be installed of either steam or hot water types with a fixed pipeline on the deck with connection valves for hoses in areas designated for control of cargo loading and unloading (including high walkways).

8.3 Winterisation of offshore supply vessels

8.3.1 This Section applies to sea-going ships specially designed and constructed for the carriage of specialised stores and cargoes to mobile offshore units and other offshore installations, and also to offshore tug/supply ships which in addition to the above perform the duties of a tug, see Pt 4, Ch 4 Offshore Support Vessels of the Rules and Regulations for the Classification of Ships, July 2022.

8.3.2 For offshore supply vessels, cargo lines for liquid tanks or bulk cargo tanks are to be provided with suitable drainage and connections for dry air to be blown through, see Ch 1, 5.4 Winterisation of auxiliary machinery systems and deck working areas 5.4.2.

8.3.3 For vessels with a rescue zone, suitable arrangements are to be provided to protect against ice freezing:

  1. on a cross-deck area between the rescue zones port and starboard;

  2. the sides and railings in the rescue zone; and

  3. routes to the accommodation/treatment areas.

8.3.4 In conjunction with Ch 1, 5.11 Ice removal and prevention measures 5.11.1, heating arrangements are to be provided for escape routes and access to emergency systems, including access and areas around lifeboats, liferafts, rescue boats and rescue zones, walkways on the aft deck, emergency generator and the fire-fighting platform.

8.4 Winterisation of LNG and LPG carriers

8.4.1 The air intakes and exhaust louvres for the spaces as in Table 1.8.2 Space heating arrangements for LNG and LPG carriers are to be provided with protection from icing by ice removal measures and heating arrangements.

Table 1.8.2 Space heating arrangements for LNG and LPG carriers

Space Heating arrangements Alarm, see Note 1
Cargo control room Fixed, see Note 2 X
Cargo pump-room Multiple fixed steam type X
Compressor and motor rooms (where fitted) Multiple fixed X

Note 1. Monitoring arrangements are to be provided that will activate an alarm in accordance with the alarm system required by Pt 6, Ch 1, 2 Essential features for control, alarm, monitoring and safety systems of the Rules and Regulations for the Classification of Ships, July 2022 to allow responsible personnel to reinstate heating in the event of a failure.

Note 2. A portable heater may be accepted for Winterisation C(t).

8.4.2 In conjunction with Table 1.3.1 List of equipment and components, the heating requirements in Table 1.8.2 Space heating arrangements for LNG and LPG carriers are to be complied with.

8.4.3 Ice removal measures are to be installed of either steam or hot water types with a fixed pipeline on the deck with connection valves for hoses in areas designated for control of cargo loading and unloading (including high walkways).

8.5 Winterisation of bulk carriers and container ships

8.5.1 To prevent freezing of exposed cargo securing arrangements, they are to be of suitable material for the lowest design air temperature, provided with suitable low temperature grease and with ice removal measures.

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