Our Services

Marine Service International operates globally in two main markets, Offshore Oil & Gas and Shipping. Our projects can range in size from blasting and re-coating a slop-tank in the Mediterranean to renewing hundreds of tons of structural steel for an FPSO cargo tank rebuild off Costa Rica.

MSI’s head office is in Drøbak, Norway. We have regional offices in Denmark and recently expanded into Brazil where we can support offshore operations from Rio de Janeiro. We also have local representatives in Singapore and Cameroon and are currently expanding into Guyana and the USA.

We Come To You

Marine Service International’s core offer is simple, we bring the shipyard to you… wherever you may be. This ensures that your FPSO, offshore drilling installation, cruise or marine vessel can remain on location without compromising maintenance standards and safety.

Once engaged our experienced project managers assemble supervisors along with the necessary multi-skilled teams of welders, pipe-fitters, hydro-blasters, spray-painters and any other specialised personnel required. We then transport our teams along with the materials, spare parts and consumables required to wherever the ship or offshore unit is in the world and carry out the operations onboard whilst the asset is in full operation.

Multi-Skilled Personnel

Whilst being fully trained and qualified in their fields MSI’s personnel are also multi-skilled and experienced in working as a team to carry out the broad variety of tasks necessary to successfully complete a project. Our project managers study every project individually to ensure that they assemble a team with the requisite multi-skills to minimise crew change-out once the project is underway.

The Benefit of Experience

MSI has over 25 years experience in carrying out corrosion repairs and maintenance work in some of the most geographically challenging locations around the world. We use that experience for the benefit of every project we are involved in and we take pride in the quality, service and efficiency we provide.

Core Services


Manual removal, de-mucking ejectors and/or vacuum systems are used to ensure a cost effective and quick removal of sediments for inspections and repairs of all types of onboard tanks.

MSI High Pressure Hose Cleaning Tank

NORM Removal

MSI have successfully completed large NORM removal projects such as cargo tanks and topside installations at sea to prepare for refitting or decommissioning.

Cleaning and Gas-Freeing

MSI uses a combination of high-pressure water (typically heated) and environmentally friendly de-greasing chemicals to clean areas to be repaired to hot-work standards.


MSI can erect any type of scaffolding needed onboard to obtain access to tank internals or any maintenance/repair item externally on the vessel. We have systems for hull repairs above the water-line and accommodations/engine casings.

SPS Overlay

MSI have completed several SPS installations in order to restore strength to the structure of offshore installations. SPS is approved by all major Class authorities as an alternative steel repair where crop and replace steel construction is challenging to execute during operation (the main deck or hull plating under the water line for instance).

UHP and Grit Blasting

Ultra High Pressure (UHP) blasting with fresh water has almost replaced grit blasting as a surface preparation tool for off-shore use and MSI has 15 years of experience with these machines worldwide. Using a fleet of 25+ UHP machines tailored for onboard use and a staff of over 100 UHP operators, MSI is able to assist with any size of blasting project you may have.

Grit blasting is suitable for many types of project such as preparing areas for SPS overlay or ready scrubbers and filters for speciality coatings like vinyl ester glass flake products.


Using professional crews with spray painting experience from coatings repairs on over 500 vessels, MSI can repair or replace any coating system onboard.

MSI Spray Painting Deck Olive

Steel Repairs

MSI can carry out class approved steel repairs to any onboard structures. We have changed out hundreds of tons of steel in tanks without any interruptions to the vessel’s operation.

UHP Cutting

MSI uses the most modern equipment to cold-cut steel onboard for access or crop and removal. Piping, profiles and steel plate up to 50 mm thickness can easily and cost-effectively be cut using UHP water without any need for cleaning or gas-freeing.

Pipe Repairs and Installations

MSI carries out repairs and replacement / installation of hydraulic and pneumatic lines and cargo heating systems. Using a combination of access lift platforms and rope access, MSI can replace or repair any hydraulic lines or heating coils in your tanks with no interruptions to the operations of the vessel.

MSI crops and renews any dimension pipes onboard and by using cold-cutting with UHP water is able to crop and renew a large array of process piping without the need for Hotwork permits and the associated cleaning and preparation work.

MSI offers fabrication of pipe sections, spool-pieces and other steel structures from facilities in Gdynia, Poland and Port Harcourt, Nigeria.


As a part of our pipe repair and renewal service, MSI AS also provide fully qualified Insulation specialist to replace and renew Cryogenic Insulation which allows potentially significant Corrosion Under Insulation to be repaired as well.

Asbestos removal

MSI have a team of specialised staff ready to undertake any kind of asbestos removal onboard Marine and Offshore installations.

Upgrade of Living Quarters

Whether its refurbishing existing accommodations or installing additional POB capacity, MSI offer qualified and experienced and multi-skilled installers who are able to handle the project from steel modifications to upgrading interior and renewing electrical and HVAC systems. Project Management is handled from either the Oslo (Drøbak) or Singapore office. Additional POB capacity can be gained from bridge conversions, expansion of existing accommodations and/or installation of containers fitted out as cabins or offices.

We specialise in providing these class approved quality services to maintain the structural integrity of:

  • FPSO, FLNG and FSU facilities
  • Drilling installations
  • Fixed Oil & Gas installations
  • Cruise vessels
  • Commercial vessels of any type
We specialise in providing class approved quality services to maintain the structural integrity of Oil & Gas assets worldwide.

Got a project? Email the team at info@msi.no or fill out our Contact Form here…