Section 9 Internal atmosphere humidity
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Submarine Assurance Framework, July 2022 - Volume 1 Submarine Assurance - Part 4 Whole Boat Requirements - Chapter 2 Transverse Criteria - Section 9 Internal atmosphere humidity

Section 9 Internal atmosphere humidity

Parent topic: Chapter 2 Transverse Criteria

9.1 Functional objective

9.1.1 The internal submarine, systems, equipment and components shall be able to operate when exposed to the range of internal atmosphere humidity which can be experienced on a submarine for all foreseeable operating conditions.

9.2 Performance requirements

9.2.1 operating conditions. Humidity limits are to be set taking into account internal air pressure and temperature variation for normal and abnormal operating conditions.

9.2.2 Humidity limits are to be set giving due consideration to all sources of water vapour within the submarine.

9.2.3 The range of humidity variation during submarine operation at sea and alongside is to be defined such that equipment can be tested to ensure it can accommodate the cyclic variation or be provided with suitable protection.

9.2.4 The maximum and minimum transient internal humidity shall be defined for emergency operating conditions. The following scenarios shall be considered: loss of HVAC or cooling, leaks from steam or other high temperature systems,

9.2.5 Where submarines are to be inactive for periods of time, suitable arrangements are to be provided to protect key equipment against the effects of condensation.

9.2.6 The atmosphere humidity defined shall take account of the impact on embarked persons.

9.2.7 The systems, equipment and components are to be verified as being effective and safe for the full range of internal atmosphere humidity.

9.2.8 Atmosphere Control requirements shall be complied with.

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