Thickness Gauging for Ships Calling at Kristiansand on the Skagerrak

Inspection services for ships at Kristiansand

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

Where a ship can be gauged in Kristiansand

Most gauging in Kristiansand is done afloat during commercial calls. At the ferry berths the useful time is the period between arrival and the next departure, when the chief engineer can release pipework for measurement and parts of the car deck are clear of vehicles. At the container terminal the team works on scrubber pipework, deck plating and accessible void spaces while the cranes handle cargo, keeping clear of the lashing gangs. At the industrial quays the discharge itself sets the pace: as each hold empties, its tank-top and lower hopper plating can be gauged, provided the ship arranges safe access and lighting.

Ships trading to Kristiansand usually take their dockings to yards on Norway's west coast, in Denmark, in Poland or further afield, depending on size and the owner's contracts. Readings taken during a call here therefore often serve as a pre-docking survey, identifying where steel renewal is likely so that the yard specification and the class surveyor's close-up plan are realistic before the ship sails for dock. Ships waiting for a berth can anchor in the outer fjord, and a small scope can be done there by launch when the agent arranges the boat and the master agrees.

• Ferry berths for the Hirtshals crossing — engine-room piping, car-deck plating and door-surround structure measured within a turnaround or a timetable gap.
• Container terminal — scrubber wash-water and overboard lines, deck plating and voids on feeders while cargo is worked.
• Industrial quays at the nickel refinery and silicon works — hold tank-tops, hopper plating and coamings on bulk and general cargo ships as holds are emptied.
• General cargo quays in the harbour — ballast tank and deck gauging on short-sea ships with longer cargo stays.
• Cruise berths near the town — machinery-space and open-deck measurements on cruise ships, agreed with the chief engineer.
• Outer-fjord anchorage — limited launch-borne scopes on ships waiting for a berth, weather permitting.

Inspection rules and fleet pressures at Kristiansand

Port state control in Norway is carried out by the Norwegian Maritime Authority under the Paris MoU, and Kristiansand sees the full range of flags, from Norwegian and Danish ferries to feeders and bulk carriers registered in open registries. Structural deficiencies recorded by a port state control officer, such as a wasted air-pipe head, a holed ventilator or a corroded hatch coaming, frequently lead to a class condition and a request for thickness readings before the ship leaves or at its next port. Ships of 500 gross tonnage and above that trade to EU ports must also carry an Inventory of Hazardous Materials, and many owners schedule its update and the renewal survey gauging for the same docking.

Short Skagerrak crossings put a ferry through far more load cycles in a year than a deep-sea ship sees, and winter brings rough, short seas across the strait. The fore end, the bow door and visor arrangements, the stern ramp and the car-deck supports take repeated impact and flexing, so fatigue cracking matters as much as wastage on these ships. Magnetic particle testing at the welds of door hinges, locking devices and deck brackets is a natural companion to gauging. Bulk ships at the industrial quays face a different problem: residues of raw material left at bilge wells and along tank-top edges hold moisture, and local wastage there is a common finding on older hulls.

Ships trading to Kristiansand 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 Kristiansand

The sequence for a thickness measurement job at Kristiansand is short and written down, so the yard, the surveyor and the superintendent know who arranges what.

Kristiansand Airport, Kjevik, north-east of the city, has domestic and European connections, and the port is a short drive from the terminal. The commercial and industrial quays are ISPS-controlled; the ship's agent obtains passes, and the industrial sites add their own safety induction for anyone boarding at their berths. Norway belongs to the Schengen area, so the technicians coming from India need Schengen visas, which take weeks to arrange; owners with regular Kristiansand calls can shorten the lead time by asking us to keep the assigned technicians' visas current.

• 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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