Section 1 General requirements
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 1 Controlled Atmosphere Systems - Section 1 General requirements

Section 1 General requirements

Parent topic: Chapter 1 Controlled Atmosphere Systems

1.1 General

1.1.1 The requirements of this Chapter apply to refrigerated cargo ships where a Controlled Atmosphere (CA) notation is requested.

1.1.2 The requirements are additional to the classification requirements for refrigerated cargo installations contained in Pt 6, Ch 3 Refrigerated Cargo Installations.

1.1.3 Ships provided with CA systems which are approved, installed and tested in accordance with the following requirements will be eligible for the applicable class notation specified in Pt 1, Ch 2, 2.6 Class notations (refrigerated cargo installations (RMC), controlled atmosphere (CA) systems and carriage of refrigerated containers (CRC)) 2.6.2.

1.1.4 An example of a typical class notation on a refrigeration installation classed with Clasifications Register (hereinafter referred to as 'LR'), fitted with a CA system built under Special Survey, would be:

Clasifications RMC to maintain a temperature -29°C to +14°C with sea temperature 35°C maximum.
CA (1-12% O2, 0-25% CO2) RH

1.2 Novel arrangements and design

1.2.1 Where the proposed construction of the CA system, or CA zones, is novel in design, or involves the use of unusual materials or equivalent arrangements to those specified in the following sections, special tests may be required, and a suitable descriptive note may be assigned.

1.3 Definitions

1.3.1  CA zone means one or more cargo chambers enclosed in an air-tight envelope.

1.3.2  Gas means a suitable gaseous mixture to retard the metabolic process of fresh products.

1.3.3  Gas system means a system which controls the levels of oxygen and/or carbon dioxide.

1.3.4  Adjacent space means an enclosed space adjoining a CA zone separated by watertight bulkheads or decks penetrated by pipes, cables, ducts, doors, `tween deck, etc.

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