Inert Gas System
Inergen
Why choose an Inert Gas System?
- Rapid fire extinguishing – usually within 40 seconds.
- Thorough fire extinguishment – minimizing reignition risks.
- No harm to individuals or equipment.
- Prevents secondary damages.
Offshore firefighting systems
Firefighting solutions
At Semco Maritime, we deliver complete firefighting system solutions designed specifically for offshore renewable installations such as wind farm substations and transformer platforms. Our systems ensure optimal fire safety, protecting people, assets, and the environment in even the most challenging offshore conditions.
Reliable Fire Protection Systems for Offshore Operations
A fire offshore can have severe consequences, that’s why an efficient fire protection system is essential. Semco Maritime provides fully integrated firefighting systems and fire detection systems engineered to meet international safety standards and the strict requirements of offshore wind farms.
Our engineering teams combine decades of offshore experience with advanced technology to design solutions that ensure rapid detection, suppression, and control of fires. Whether it’s an unmanned substation or a manned platform, our fire protection systems are built for reliability and long-term performance.
Tailored Fire Fighting Systems for Every Project
Every offshore project is unique. Semco Maritime designs and installs fire fighting systems that are tailored to your asset’s layout, operational profile, and safety requirements. We provide end-to-end support, from design and engineering to procurement, construction, installation support, and commissioning.
Our systems include
All components of the fire system are built and tested to international standards (NFPA, EN, and ISO), ensuring full compliance and dependable operation throughout the asset lifecycle.
Foam System
Compressed Air Foam (CAF)
Why choose a foam system?
- Efficient firefighting against fuel fires.
- Useable in outdoor environments.
- Object protection for equipment requiring three-dimensional coverage of firefighting
- Fluorine-free foam provides environmentally friendly firefighting solutions.
DIFF system
Helideck Firefighting Systems
Why choose a helideck firefighting system?
- A standalone helideck firefighting system ensures that the helideck can be used even if the foam system has been released/emptied.
- Non-pop-up nozzles which are almost flat on top of the helideck.
- With a safety deck, only water is needed to extinguish a fire.
Aerosol System - DSPA
Dry Sprinkler Powder System (DSPA)
Why choose an Aerosol Firefighting System?
- Exceptional Effective non-toxic fire extinguishing agent.
- Ecologically safe and environmentally friendly.
- Significantly reduces the likelihood of equipment downtime.
- Uniquely easy to install and maintain.
Proven Offshore Expertise
With more than 40 years of offshore experience, Semco Maritime has become a trusted partner for renewable energy operators worldwide. We have delivered firefighting systems for offshore substations across the North Sea, Asia, and the U.S., ensuring continuous operation and maximum safety.
Our specialists understand the harsh offshore environment, high humidity, saltwater exposure, vibration, and confined spaces, and design each fire protection system to withstand these exact conditions.
Lifecycle Support and Maintenance
Our commitment doesn’t end with commissioning and handover. We offer ongoing service, maintenance, and periodic inspections to ensure your firefighting system operates flawlessly year after year. Preventive maintenance programs ca help to reduce downtime and optimize system performance.
In addition, Semco Maritime can retrofit or upgrade existing fire systems to meet the latest safety regulations or adapt to new operational requirements.
Extensive offshore wind experience
In collaboration with partners, we have successfully completed the design and construction of more than 20 offshore substations, which makes us a leader in EPCI solutions and services for the offshore wind industry.
Operation, service and monitoring
We take care of all phases of firefighting projects including operation, service, and monitoring in order to maximise your uptime. From simple ad hoc service based on time and material to full-scope asset lifetime service agreements
We have done it before:
Cases and references
Case: Vineyard, US
Firefighting for Vineyard Wind 1
800MW offshore substation project for windfarm, located off the coast of Massachusetts US.
The active fire protection consists of one self-expanding foam system, two inert gas systems, and one DIFF system.
The foam system provides object protection of the oil-filled equipment, HV Transformers, HV shunt reactors, and EATs. The Inert gas systems provide total flooding applications in all electrical utility rooms.
The DIFF system provides protection of the helideck by covering the deck in a water/foam mix within 15 seconds, using Nitrogen propellant.
Case: Arcadis
Arcadis Ost substation
Offshore substation for wind farm located off the coast of Germany. The project consisted of design, procurement, installation, and commissioning of the active fire protection systems.
Stand-alone Inert Gas systems are installed for protection of electrical utility rooms, a redundant premix foam system for all oil-filled equipment, HV Transformer, shunt reactor, and EAT. Finally, a pump-driven non-popup DIFF system protects the helideck.
Case: Ørsted
Hornsea Project One
Design and EPCI of firefighting systems for the Hornsea Project One offshore substation in the UK sector (2016-2018). Transformers, auxiliary transformers and shunt reactor rooms are protected by a stand-alone foam system (fluorine-free foam). All other rooms requiring fire protection are protected by an argonite inert gas system.
Case: HSM Offshore and Energinet
Horns Rev 3
Design, production, testing and installation of stand-alone low-pressure water mist system designed to protect two diesel generator rooms on Horns Rev 3 in the Danish North Sea (2015-2016).
Case: Bladt Industries and Vattenfall
Sandbank
A very large offshore substation project as far as the scope is concerned since high voltage systems, SCADA and fire protection are part of this project. The project phases include engineering, procurement, installation and commissioning of topside equipment in the German North Sea. The project was completed in August 2016 after which intensive testing and training took place.
Case: Bladt Industries and Innogy
Nordsee One
EPCI contract including all electrical disciplines and all phases from design to commissioning of an offshore substation for Innogy Nordsee One Wind Farm in the German North Sea (2014-2016). Semco Maritime’s scope included: Transformers, high voltage equipment, medium voltage equipment, fire and gas detection, firefighting systems, heating, ventilation and air conditioning, telecommunication systems.
Your Trusted Partner in Offshore Fire Safety
Safety is at the core of everything we do. Semco Maritime’s integrated firefighting systems safeguard the reliability of renewable energy operations and help customers meet both regulatory and sustainability goals.
Our mission is simple: to protect life, assets, and the environment while enabling a safe and efficient energy transition.
Contact us today to learn how our custom-engineered fire protection systems can enhance the safety and performance of your offshore renewable assets.
