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Machinery spaces, gas, IMO MSC/Circ.848


We conduct fire tests according to International Maritime Organization (IMO) test methods. Our expertise, facilities and equipment fulfils the requirements set out in the IMO test procedures. In addition, we actively participate in the development work of IMO test methods to assure up to date services.

IMO MSC/Circ.848 is in the scope of accreditation of VTT Expert Services Ltd.

Test method

The test procedure describes a fire test method for evaluating the extinguishing effectiveness of fixed gas fire-extinguishing systems for protection of machinery spaces of category A and cargo pump-rooms.

The test programme has two objectives

  • Establishing the extinguishing effectiveness of a given agent at its tested concentration 
  • Establishing that the particular agent distribution system puts the agent into the enclosure in such a way as to fully flood the volume to achieve an extinguishing concentration at all points 

Essentially the test procedure consists of following items

  • Minimum of 500 m3 test compartment with engine mock-up and floor plate system 
  • Alternatively nine different fire test scenarios or four different fire test scenario combinations 
  • Main fire loads are light diesel oil, heptane and wood crib 
  • Different acceptance criteria depending of test scenario 

 Other test methods for extinguishing systems:

Tel.+358 20 722 7070
Fax+358 20 722 7001

Opening hours 9:00 - 11:00 and 12:00 - 15:00, GMT +2 time zone




P.O. Box 47, FI-02151 Espoo, Finland
Tel. exchange +358 20 722 111
Opening hours Mon - Fri 8:00 - 16:30,
GMT +2 time zone
Fax +358 20 722 7001
Contact us

Tel. +358 20 722 7070
Fax +358 20 722 7001
Opening hours 9:00 - 11:00 and
12:00 - 15:00,
GMT +2 time zone