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Vessels carrying cargos that produce hydrocarbon vapors require an inerting solution to eliminate risk.

Inert Gas Generator Solutions

Vessels carrying cargo producing hydrocarbon vapour require an inerting solution to eliminate the risk of explosions and fires in the cargo tanks. This can be achieved by keeping the oxygen content below 8%, a standard set by IMO. The Maritime Protection Inert Gas Generator (IGG) system is a combustion solution that creates inert gas containing oxygen less than 5%. A series of Maritime Protection Inert Gas systems designed and delivered for different applications have been the key choice for the marine market since the 1980s.


  • Flexible solutions from loose equipment to turn-key deck house modules
  • Easy installation – data communication between operator panels
  • High grade corrosion resistant steel used for the combustible chamber and cooling jacket
  • Easy access to burner & combustion chamber for inspection and service
  • Fully automatic operation with PLC Control
  • Modern operator screen with state of the art operator feedback
  • Automatic turn down ensures best possible fuel economy


  • Space saving installation
  • Easy to install and operate
  • Best possible fuel economy
  • Reliable operation performance and easy maintenance



The main purpose of the inert gas production plant is to produce the required quantity of inert gas with the specified oxygen content. The overall inert gas system consists of a combustion air blower, feeding air to the generator where the production of inert gas takes place. The generator has a design capacity as specified, and is automatically operated. In case the produced inert gas capacity is larger than the demand, the system automatically reduce its production.

The main sub-systems for an IGG are:

  • Combustion air blowers
  • Combustion chamber/scrubber
  • Fuel system
  • Control system with valves & instruments
  • Deck water seal & P/V breaker

Operation and maintenance

  • Graphical LCD operator terminal, all major process parameters displayed on the screen
  • Combustion chamber and cooling jacket in high performance austenitic stainless steel (ASTM N08904)
  • Easy access to burner and combustion chamber by hinged burner front door (no tools required)
  • Easy inspection and easy replacement of scrubber components by entering man hole and removable top plate
  • Easy installation
  • Data communication between panels


  • Multiple LCD operator terminals
  • System signals and operation available for ships
  • IAS via MODBUS or ETHERNET communication>
  • Tailor made systems

LCD operator terminal functionality

  • Start and Stop IG generator system
  • Monitor valve positions and motor running status
  • Adjust O2 set-point
  • Monitor process and status indication
  • Monitor alarm and adjust alarm set-points
  • Adjust controller set-points and parameters


Product name Product type  Product details 
Maritime Protection IGG Inert Gas Generator System HFO/MGO/MDO/Gas fueled generator for inerting tankers
Maritime Protection DFIGG Dual Fuel Inert Gas Generator System IGG, dual fuel-capable to use natural gas or MGO/MDO/HFO as fuel for inerting FPSO’s/FSU’s.
Maritime Protection Flex-Inert Flex Inert System Inert gas generator system in combination with exhaust gas from main engine or auxiliary engines for fuel saving.
Maritime Protection Flue-Gen Flue-Generator System Flue-Generator System Normal generator + flexinert venturi. Can be operated in two modes:
  • Generator mode
  • Fluegas mode with suction of flue gas from boilers through flex venturi and scrubbing in generator
Maritime Protection IG-Deck House modules Inert Gas Deck House Modules Applications are tankers, FPSO’s and oil barges. All systems and capacities available.


In accordance with the SOLAS convention, all vessels over 8 DWT carrying hydroncarbon based cargo must supply inert gas to create a non-explosive atmosphere with oxygen below 8%, and establish positive pressure in cargo tanks & deck line. IGG must be operational during all discharges of cargo. To achieve inert gas notation for the vessel, the Inert Gas system must be 125% of cargo pump capacity.

Combustion inert gas systems are commonly used on:

  • Product tankers
  • Chemical/product tankers
  • Offshore vessels like FPSO/FSO’s
  • S-Max and A-max tankers
  • Shuttle tankers
  • Petroleum product barges

Combustible Inert gas systems are used for:

  • Primary inert cargo tanks
  • Prevent Oxygen from entering cargo tanks
  • during discharge
  • Purging of tanks
  • The Inert gas generator in fresh air mode
  • Used to gas free tanks prior to inspection
  • Ventilating of tanks


The Maritime Protection Inert Gas Systems are built in accordance with 1974 SOLAS Convention with latest amendments, and are fulfilling all of Class, IMO’s guidelines and the demanding conditions of shipboard operation.


Protecting small ships with inert gas systems

Industry calls for revision to the rules

We’re supporting initiatives within the industry to install inert gas systems on oil and chemical tankers less than 8000dwt. If you are carrying a flammable cargo, then you should have an inert gas system onboard.


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Authorised agent of Maritime Protection AS, Norway

Contact Information:

Giantech Engineering Pte Ltd
16 Boon Lay Way, #01-51 Tradehub 21,
Singapore 609965
+65 6316 8595
[email protected]

Survitec Group Limited
Head Office, 12 Finsbury Square, 4th Floor
London, United Kingdom, EC2A 1AS