Section 6 Hold access and maintenance access arrangements
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Ships, July 2022 - Part 7 Other Ship Types and Systems - Chapter 10 Carriage of Refrigerated Containers - Section 6 Hold access and maintenance access arrangements

Section 6 Hold access and maintenance access arrangements

Parent topic: Chapter 10 Carriage of Refrigerated Containers

6.1 Hold pressure/vacuum

6.1.1 The maximum permitted pressure or vacuum that may occur in the hold space is to be stated. It is proposed that a value, in accordance with the contents of Pt 3, Ch 1, 9.7 Definitions and details of tests 9.7.4, may be considered as a maximum value. An overpressure of 0,015 MPa may be used for guidance purposes. If the ventilation system is capable of producing a positive pressure or vacuum in excess of the design allowable figure, then means are to be provided to protect the hold space against the effect of over pressure or vacuum. If axial supply fans are proposed, even if aerofoil fan blades are fitted, it is unlikely that the fans will be able to produce a pressure above 0,0025 MPa (250 mm water gauge).

6.1.2 If required, consideration is to be given to the use of a pressure or vacuum relief device or other arrangement set to operate below the maximum allowable hold pressure or vacuum.

6.1.3 The proposed pressure or vacuum relief device for each hold space is to be of adequate size.

6.2 Hold access arrangements

6.2.1 Suitable means are to be provided to allow personnel safe access to each hold space when the ventilation system is in operation. Consideration is to be given to the possible over pressure or partial vacuum that may occur in the hold space. The use of an airlock arrangement may need to be considered.

6.3 Maintenance access arrangements

6.3.1 Free access to each applicable container cell and hold space is to be provided to allow replacement of refrigeration equipment in the event of failure or malfunction.

6.3.2 Adequate access is to be provided to allow plugging in, data recording or retrieval and general maintenance of all deck- and hold-stowed refrigerated containers. Suitable means are to be provided to allow the removal of the compressor and electric motor from each refrigerated container.

6.3.3 Suitable safe access is to be provided to each tier of deck stowed refrigerated containers to allow electrical connection, monitoring and maintenance. The use of fixed platforms, such as lashing bridges, should be proposed where possible.

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