DNV GL has provided us with the following information:

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Many aspects which determine the fire risk in an engine room, such as insulation, screening and the routing of pipes, cannot be easily addressed in the design approval phase. Therefore, these aspects require adequate attention during the newbuilding construction phase. 

Insulation and screening deteriorate during the vessel’s operational phase and require extra attention during the vessel’s inservice phase. Often, deficiencies within these two aspects are easy to detect during a survey. However, missing insulation or screening is not always easy to identify, especially on relatively new ships. Therefore, it is important that all requirements are met when the vessel is delivered – making follow-up during the ship’s lifetime simpler. 

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Please find further info below:

DNV GL Technical Regulatory News No8 2016.pdf

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