6.4 Ventilation of hazardous spaces
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - International Codes - 2009 MODU Code - Code for the Construction and Equipment of Mobile Offshore Drilling Units, 2009 – Resolution A.1023(26) - Chapter 6 - Machinery and Electrical Installations in Hazardous Areas for All Types of Units - 6.4 Ventilation of hazardous spaces

6.4 Ventilation of hazardous spaces

  6.4.1 Hazardous enclosed spaces should be adequately ventilated. Hazardous enclosed mud processing spaces should be ventilated at a minimum rate of 12 air changes per hour. Where mechanical ventilation is applied it should be such that the hazardous enclosed spaces are maintained with underpressure in relation to the less hazardous spaces or areas and non-hazardous enclosed spaces are maintained in overpressure in relation to adjacent hazardous locations.

  6.4.2 All air inlets for hazardous enclosed spaces should be located in non-hazardous areas.

  6.4.3 Each air outlet should be located in an outdoor area which, in the absence of the considered outlet, is of the same or lesser hazard than the ventilated space.

  6.4.4 Where the ventilation duct passes through a hazardous area of a higher level, the ventilation duct should have overpressure in relation to this area; where the ventilation duct passes through a hazardous area of a lower level, the ventilation duct should have underpressure in relation to this area.

  6.4.5 Ventilation systems for hazardous spaces should be independent from those for non-hazardous spaces.

Parent topic: Chapter 6 - Machinery and Electrical Installations in Hazardous Areas for All Types of Units
Copyright 2022 Clasifications Register Group Limited, International Maritime Organization, International Labour Organization or Maritime and Coastguard Agency. All rights reserved. Clasifications Register Group Limited, its affiliates and subsidiaries and their respective officers, employees or agents are, individually and collectively, referred to in this clause as 'Clasifications Register'. Clasifications Register assumes no responsibility and shall not be liable to any person for any loss, damage or expense caused by reliance on the information or advice in this document or howsoever provided, unless that person has signed a contract with the relevant Clasifications Register entity for the provision of this information or advice and in that case any responsibility or liability is exclusively on the terms and conditions set out in that contract.