Thickness Gauging for Refinery Tankers and Bulk Carriers at Kalundborg

Inspection services for ships at Kalundborg

Each service has its own page with the method, the class requirements and what the report contains.

Where gauging is done at Kalundborg

Kalundborg is an industrial harbour rather than a repair port, so ships are gauged afloat at their working berths. At the refinery jetty, the terminal's rules govern everything the team brings and does: equipment is cleared in advance, enclosed-space entry follows the ship's permit system, and work on deck keeps away from the manifold during cargo transfer. The bulk quays give more freedom. Holds can be measured as each one is emptied and swept during discharge, and on a ship loading at the port the ballast tanks become reachable once they have been pumped out and the crew has ventilated them.

Ships trading to Kalundborg go elsewhere for dry-docking. Fayard at Lindø on Funen is the closest large repair yard, a short passage across the Great Belt, and Ørskov Yard in Frederikshavn and yards in Poland and Germany are other common choices. Measuring ballast tanks and deck during a Kalundborg call before a docking lets the superintendent give the yard a firmer steel estimate. Ships lying at a waiting berth for cargo or between charters are the best candidates for longer pre-purchase or condition gauging, since the crew can open spaces in turn without cargo work getting in the way.

• Refinery crude and product jetty — ballast tank, forepeak, void-space and deck gauging on tankers during cargo operations, under terminal rules.
• Power station bulk quay at Asnæs — hold and tank-top readings on bulk carriers discharging biomass fuel.
• Public port bulk and project quays — holds, ballast tanks and deck on bulk and general cargo ships alongside.
• Ro-ro berths — vehicle-deck, ramp and ballast tank measurement on ro-ro ships during scheduled port time.
• Waiting berths in the harbour — pre-purchase and on-hire condition gauging on idle ships.
• Fayard dry docks, Lindø — shell and bottom gauging when a Kalundborg trader goes to dock on Funen.

Refinery tankers, vetting and port state control at Kalundborg

Port state control in Kalundborg is the work of the Danish Maritime Authority under the Paris MoU, and tankers calling at a refinery attract attention from several directions at once. Alongside the PSC risk profile, charterers and the terminal's ship-acceptance process look at vetting reports and the ship's structural history, and a tanker with recent corrosion findings may be asked for evidence of repairs or fresh measurements before she is fixed again. Thickness readings set out against the allowable diminution for each member are the kind of evidence those reviews look for.

Kalundborg's industry is also in transition. The Symbiosis companies are investing in lower-carbon production, the power station has left coal behind, and EU climate rules now reach shipping through the ETS, applied from 2024, and FuelEU Maritime, applied from 2025. Ships of 500 GT and above that call at Danish ports must also carry a valid Inventory of Hazardous Materials under the EU Ship Recycling Regulation. For owners of older tankers and bulk carriers on Danish and Baltic trades, these rules change the case for keeping ageing ships, and gauging data from a Kalundborg call helps show whether the next renewal survey is worth the steel it will demand.

Ships trading to Kalundborg are inside a sulphur emission control area, where fuel must not exceed 0.10% sulphur unless an exhaust gas cleaning system (scrubber) is fitted. Scrubber wash-water piping, the overboard discharge and the hull penetration around it are among the fastest-corroding parts of a modern ship, so they belong in the gauging scope at every docking and, on open-loop systems, between dockings.

How a thickness measurement job runs at Kalundborg

Most of the work on a Kalundborg job happens before the team boards: scope, plan and access are settled first, so the time on board goes on measurement.

Copenhagen Airport is the natural arrival point for Kalundborg, with a regional rail line running west across Zealand to the town and road transfers as an alternative. The refinery jetty and industrial quays sit behind ISPS-controlled gates, and the refinery adds its own safety induction, so the ship's agent passes the team's details to the terminal in advance. Technicians come from India on Schengen visas, and because tanker berthing windows can shift, we confirm travel against the agent's latest berthing prospect rather than the first estimate.

• Send the vessel name or IMO number, ship type, class society, the survey due (annual, intermediate, renewal survey number, CAP or owner's condition survey), the port and dates, and the scope you expect.
• We confirm the scope against the class rules for that survey, prepare the thickness measurement plan with frame and section references, and say whether the measurement will be credited to a class survey.
• Mobilisation is planned around visa lead times and the vessel's schedule; the ship's agent arranges port access, and the yard or ship arranges staging, lighting, ventilation and gas-free certificates.
• Gauging with calibrated ultrasonic thickness gauges: through sound coatings only where the gauge's through-coating mode has been verified on a coated reference, otherwise on cleaned bare steel, with every reading tied to its frame, strake and location on the sketch.
• Readings are compared with original thicknesses as work proceeds; substantial and excessive corrosion and any cracks are reported to the attending surveyor and the superintendent the same day.
• The final report is issued on the class thickness-measurement formats with sketches, a summary of locations exceeding the allowable margins, piping tables where piping was in scope, and the gauge calibration and technician certificates.

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