Hazardous areas Zone 1
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - International Codes - 1979 MODU Code – Code for the Construction and Equipment of Mobile Offshore Drilling Units – Resolution A.414(XI) - Chapter 6 – Machinery and Electrical Installations in Hazardous Areas for all Types of Units(See also 4.1) - 6.2 Classification of hazardous areas1 - Hazardous areas Zone 1

Hazardous areas Zone 1

  6.2.3

  • .1 Enclosed spaces containing any part of the mud circulating system that has an opening into the spaces and is between the well and the final degassing discharge.

  • .2 Enclosed spaces or semi-enclosed locations that are below the drill floor and contain a possible source of release such as the top of a drilling nipple.

  • .3 Enclosed spaces that are on the drill floor and which are not separated by a solid floor from the spaces in 6.2.3.2.

  • .4 In outdoor or semi-enclosed locations, except as provided for in 6.2.3.2, the area within 1.5 metres from the boundaries of any openings to equipment which is part of the mud system as specified in 6.2.3.1, any ventilation outlets of Zone 1 spaces, or any access to Zone 1 spaces.

  • .5 Pits, ducts or similar structures in locations which otherwise would be Zone 2 but which are arranged so that dispersion of gas may not occur.

Parent topic: 6.2 Classification of hazardous areas footnote
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