Tank Demucking at Colombo Port
Sludge out, capacity back
Get a quote
Tell us the vessel, the port and the window. Scoped reply, usually the same working day.
Cleanship Marine removes accumulated sludge, scale and sediment from cargo and bunker tanks at Colombo Port, Western Province — the manual, enclosed-space work that washing alone will not do.
Sludge is a slow loss: it takes cargo capacity, it fouls heating coils and suctions, and it turns every subsequent tank clean into a longer job. Disposal is the part that actually governs the schedule here — the muck has to go somewhere licensed, and that is arranged before the tanks are opened.
What it gets you
- Cargo and bunker capacity recovered rather than carried as dead weight
- Heating coils and suctions cleared, restoring discharge performance
- Disposal documented through licensed reception
- Tank structure inspected while it is open and empty
Working conditions at Colombo
Work here runs both alongside and at anchorage depending on the call, and on the passage out where neither gives enough time. The two monsoons sets the outer limits of the calendar, the south-west from May to September and the north-east from December to February, and it affects the anchorage far more than the berth. Humidity is high year-round rather than seasonal, so enclosed-space work here is planned with ventilation and rest cycles in every month, not just the summer. Approval runs through Sri Lanka Ports Authority and the terminal operator, and licensed slop reception is booked before the tanks are opened — at most ports on this list that booking, not the cleaning, is what sets the date.
- Where we work
- Container terminal berths · Bunkering anchorage · General cargo quays
- Vessels we see here
- Main-line and feeder container ships · Bunker tankers and barges · General cargo ships · Cruise ships
What we do at Colombo
- Atmosphere testing, gas-freeing and enclosed-space entry certification before entry
- Manual removal of sludge, scale and sediment from tank bottoms, frames and structure
- Heating coils, suction wells and bell mouths cleared and confirmed
- Material bagged, transferred and tracked from tank to reception
- Disposal through licensed reception facilities at Colombo with the paperwork to prove it
- Tank condition photographed and reported, including anything found under the sludge
Planning the window at Colombo
The two monsoons governs the calendar at Colombo Port, the south-west from May to September and the north-east from December to February. For tank work it is the anchorage that suffers — where the terminal will not permit work alongside, weather that closes the anchorage closes the job. Whether the work runs alongside, at anchorage or on passage depends on the terminal and the grade, so the plan is built against the actual call. Where a terminal will not permit tank work at the berth, we say so at quoting stage rather than after mobilisation.
Cleanship holds an operating base at Colombo, so we can hold a team ready against a shifting ETA rather than committing travel to a date that may move.
What we typically find at Colombo
Product parcels and bunkers dominate the liquid traffic here, so most of the work is grade changes and fuel and slop tank cleaning rather than full chemical specification work.
What we find depends on whether the vessel has had time at anchorage or come straight off a berth, so the tank condition is confirmed on inspection rather than assumed from the previous cargo alone.
Standard scope of work
Included as standard on every tank demucking attendance, wherever the vessel is. Anything outside it is quoted separately and flagged before mobilisation, never added afterwards.
- Tank entry preparation
- Ventilation, gas testing, lighting, access rigging and rescue arrangements are established before any entry is authorised.
- Manual residue removal
- Sludge, wax and scale are removed by hand from tank bottoms, suction wells, bellmouths, heating coils and structural pockets.
- Vacuum and pump-out
- Pumpable residues are recovered by vacuum unit or portable pump directly to slop tanks, road tankers or barges.
- Scale and hard deposit removal
- Adhered rust scale and hardened deposits are removed by scraping, chipping or hydroblasting where the coating system permits.
- Waste handling and documentation
- Recovered material is quantified, transferred to licensed reception facilities and documented with manifests for the vessel's MARPOL records.
How we deliver it at Colombo
- 1
Scope and vessel details
Tell us the vessel, her particulars, the prior and next grade and the window at Colombo. We come back with a defined scope, a crew size and a duration we will stand behind. Where the conditions here will not support what has been asked for, we say so at this stage rather than after mobilisation.
- 2
Approvals, slops and certification
Sri Lanka Ports Authority runs a statutory permit process here, so the lead time is real and the application goes in early rather than on arrival. Licensed slop and sludge reception is booked and marine chemist attendance arranged where the grade change requires it. At Colombo the disposal route is the item that most often sets the schedule, so it is fixed first.
- 3
Mobilisation to Colombo
Cleanship holds an operating base at Colombo, so crews, pumps, machines and chemicals are on the ground rather than in transit. That is the difference between meeting a window and missing it.
- 4
Gas-freeing, entry and cleaning
Atmosphere testing, gas-freeing and enclosed-space entry certification come before any entry, and are repeated after every break. Standby cover and atmosphere monitoring run continuously while anyone is inside, and progress is reported tank by tank.
- 5
Report and handover
A completion report covering tank demucking is issued with before-and-after imagery, tank by tank and anything found that you should know about. The findings are discussed with the vessel rather than emailed and forgotten.
Colombo Port at a glance
- UN/LOCODE
- LKCMB
- Port type
- Major Port
- State
- Western Province
- Country
- Sri Lanka
- Water body
- Indian Ocean
- Port authority
- Sri Lanka Ports Authority
- Main cargoes
- Containers and transhipment, Bunkers, General cargo, Cement and dry bulk, Tea and agricultural cargo
- Crew mobilisation
- Colombo (CMB)
- Services here
- Hull Cleaning, Hold Cleaning and Tank Cleaning
Frequently asked — Tank Demucking at Colombo
Do you provide tank demucking at Colombo Port?
Yes. Cleanship Marine works Colombo Port (LKCMB) in Western Province, Sri Lanka, covering the container terminal berths, bunkering anchorage and general cargo quays. We hold an operating base at Colombo, so people and equipment are held locally rather than mobilised against a window.
Can tank demucking be done while the vessel works cargo at Colombo?
It depends on the terminal and the grade. Some berths here permit tank work alongside and some do not; we establish which before the vessel arrives and plan for the anchorage or the passage where the answer is no. The vessel stays on hire throughout, and there is no diversion and no dry dock. We scope against the conditions at Colombo and tell you honestly whether the window you have is enough.
How is slop and sludge disposal handled at Colombo?
Through licensed reception, booked with Sri Lanka Ports Authority and the terminal operator before the tanks are opened. At Colombo the disposal route is usually what sets the schedule, so it is fixed first and documented tank by tank. Gas-freeing, atmosphere testing and enclosed-space entry certification are part of the same scope.
Where is the work done at Colombo — alongside, at anchorage or on passage?
Work here runs both alongside and at anchorage depending on the call, and on the passage out where neither gives enough time. Between June and September the binding constraint is working temperature inside the space rather than access to it.
Which vessels do you carry out tank demucking on at Colombo?
Main-line and feeder container ships, Bunker tankers and barges, General cargo ships, Cruise ships — the traffic at Colombo Port runs to containers and transhipment, bunkers, general cargo, so those are the profiles we see most. The scope is sized to the vessel, not to a standard package.
How quickly can a team mobilise to Colombo?
Cleanship keeps an operating base at Colombo, so response here is fast — the constraint is normally the approvals and the working window rather than getting crews and equipment to the port.
What does tank demucking at Colombo cost?
It depends on the tank count and volume, the prior and next grade, how much sludge is in there and whether the work runs alongside, at anchorage or on passage from Colombo. We would rather scope it properly and give you a specific figure than quote a headline rate that changes once the work starts. Send the details and the window at Colombo and you get a scoped price, usually the same working day.
Tank Demucking at Colombo Port.
Tell us the vessel, her ETA at Colombo and the window. You get a scope, a crew size and an honest duration — usually the same working day.