Who Installs Ballast Water Treatment Systems?
Updated
Ballast water treatment systems are installed by shipyards and repair yards, specialist retrofit-engineering firms, riding crews sailing with the ship, and service providers, working alongside the system manufacturer and the classification society. New builds are installed at the construction yard; retrofits are done at a repair yard, at a berth, or afloat with a riding crew. Commissioning is done with the maker or an authorised provider, and sampling is coordinated with an independent laboratory.
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Key takeaways
- A BWTS installation involves the maker, an engineering firm, a shipyard or contractor, the classification society, and a commissioning service provider.
- New builds are installed at the construction yard as part of the build, avoiding the congestion and downtime of a retrofit.
- Most retrofits are done at a repair yard or berth from class-approved drawings, using spools prefabricated ashore from the 3D model.
- Riding-crew installation lets the ship keep trading but only suits scopes where piping, structure, and power allow safe work at sea.
- Commissioning is done with the maker or an authorised provider; MEPC.325(75) sampling is coordinated with an independent laboratory.
- Sea Clean is an authorized agent for Headway only and provides brand-agnostic independent support for other makes; provider status affects warranty and OEM backing.
Who Does What in an Installation?
A BWTS installation involves several parties: the system manufacturer (equipment and often commissioning), an engineering firm (survey, 3D scan, drawings), a shipyard or installation contractor (steelwork, piping, cabling), the classification society (approval and survey), and a service provider for commissioning and ongoing support.
On a well-run project these roles are coordinated by a project manager, whether from the owner, a retrofit specialist, or the yard, so that engineering, procurement, fitting, and commissioning join up.
The right mix depends on the ship, the trade, and whether it is a new build or a retrofit.
New-Build Installation
On a new build the BWTS is designed into the ship and installed at the construction yard as part of the build. The system is chosen during design, integrated into the piping and electrical systems from the outset, and commissioned as part of sea trials.
This avoids the congestion, rework, and downtime of a retrofit, which is why new-build installation is cheaper per ship. The shipbuilder and the system maker coordinate the installation.
The owner still specifies the technology to suit the intended trade and confirms the required approvals, because a new build fitted with the wrong technology for its trade is as much a problem as a bad retrofit.
Retrofit at a Shipyard or Repair Berth
Most retrofits are done at a repair yard or repair berth. The yard provides the steelwork, welding, and labour, working from class-approved drawings prepared by an engineering firm, often the same firm that did the 3D scan.
Prefabricated spools and foundations built ashore from the 3D model are brought to the yard for fitting, shortening the on-board time. The maker or an authorised service provider commissions the system after fitting.
Yard selection balances cost, location relative to the trade, slot availability, and experience with BWTS retrofits. A yard experienced with BWTS work makes fewer costly mistakes.
Riding-Crew Installation
A riding crew installs the system while the ship continues trading, sailing with the ship and working between and during voyages. This minimises commercial downtime because the ship never leaves service for the installation.
Riding-crew installation suits scopes where the ballast piping, structure, and power allow work at sea and where the work can be done safely alongside cargo operations. Not every scope suits it.
It requires careful coordination between the installation team and the ship's crew, and a well-prepared prefabrication package so the sea-going work is assembly rather than fabrication.
Who Commissions the System?
Commissioning is done with the involvement of the system manufacturer or an authorised service provider, who verifies the functional performance. The MEPC.325(75) commissioning test adds indicative biological sampling coordinated with a competent independent laboratory.
The commissioning engineer confirms dose or TRO target, neutralisation, alarms, and interlocks, and trains the crew. The class surveyor may witness the test depending on the administration.
Sea Clean AS provides installation and commissioning support and coordinates sampling with independent ISO 17025 laboratories; Sea Clean is not itself an accredited lab. It is an authorized agent for Headway only and provides brand-agnostic, independent support for other makes.
How Do You Choose a Provider?
Look for demonstrated BWTS retrofit experience, in-house or partnered 3D scanning and engineering, the ability to prepare class-approved drawings, and commissioning capability including sampling coordination. Coverage in the ship's trading region matters for attendance and support.
Confirm the provider's status for the specific system: authorised agents can supply genuine parts and OEM-backed service, while independent providers offer brand-agnostic support. Both are legitimate, but the status affects warranty and OEM backing and should be stated clearly.
Sea Clean AS supports retrofit engineering, installation, commissioning, and after-sales parts and service, attending 0–24h in Norway and the North Sea region and by arrangement elsewhere. Contact post@seaclean.no with the vessel particulars and intended or installed model.
Frequently asked questions
Can a shipyard install a BWTS on its own?
A yard provides the steelwork, piping, and cabling, but a full installation also needs engineering and class-approved drawings, the system maker's equipment, and a commissioning provider. On a well-run project these roles are coordinated by a project manager.
Who commissions a ballast water treatment system?
Commissioning is done with the manufacturer or an authorised service provider for the functional check, and the MEPC.325(75) indicative sampling is coordinated with a competent independent laboratory. The class surveyor may witness depending on the administration.
Can a BWTS be installed while the ship keeps trading?
Yes, with a riding crew that sails with the ship and works between and during voyages, provided the ballast piping, structure, and power allow safe work at sea. This minimises commercial downtime but does not suit every scope.
Does Sea Clean install ballast water treatment systems?
Sea Clean AS supports retrofit engineering, installation, and commissioning, and provides parts and service. It is an authorized agent for Headway only and offers brand-agnostic independent support for other makes, attending 0–24h in Norway and the North Sea region and by arrangement elsewhere.
Sources
Related articles
Request spares, calibration or ballast-water testing
Include BWMS brand/model, vessel/IMO number, port/terminal, date/ETA and scope or part numbers. These links prepare an email draft; you must send it yourself.
- Request a parts quote — Sensors, TRO reagents, calibration kits and replacement parts. Confirm compatibility, availability and delivery for your installed system.
- Request a calibration booking — Annual instrument calibration with a calibration certificate for the work completed. OEM instructions, drift or applicable rules may require earlier work.
- Request testing coordination — Arrange sampling and testing with an appropriately qualified party for your IMO D-2, commissioning or other stated purpose.
Authorised Headway agent. Other-brand enquiries are independently reviewed; no OEM authorisation is claimed. Sea Clean is not an accredited laboratory or approving authority. Calibration does not demonstrate biological D-2 compliance. Attendance, testing scope and parts delivery are confirmed per enquiry.