Maritime inspection · Kuwait

Ship Thickness Measurement at Kuwait's Ports and Oil Terminals

Kuwait combines two very different shipping worlds: the commercial ports of Shuwaikh and Shuaiba, handling containers and general cargo for the country's imports, and the oil terminals at Mina Al Ahmadi, Mina Abdullah and Al-Zour, where crude and product tankers and LNG carriers call. Superintendents with ships here need gauging that respects terminal rules and the northern Gulf's extreme summer heat. We mobilise a team from India to Kuwait and gauge hull structure, tanks and piping at berth, at anchorage or at the Shuwaikh shipyard.

Crude tankers under vetting pressure

Tankers lifting Kuwaiti crude and products face oil-major vetting, and older ships are often asked for CAP. We gauge cargo tank deckheads, bottoms and ballast tanks to the scope that the charterer or the CAP assessment calls for.

Northern Gulf heat and water

Kuwait has some of the hottest summers of any port region, and the shallow waters of the northern Gulf are warm and saline. Deck coatings, ballast tanks and sea-water piping on ships trading here deteriorate quickly.

Shipyard work at Shuwaikh

The HEISCO shipyard at Shuwaikh Port, with its floating dock and shiplift, repairs offshore support vessels, tugs, dredgers and other smaller tonnage. In-dock gauging there gives access to bottom plating and sea chests on the local fleet.

Inspection services for ships at Kuwait

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

Ultrasonic Thickness Measurement (UTM)

Hull, tank, deck and bulkhead gauging recorded on the class thickness-measurement formats, with sketches and corrosion flagged against the allowable margins.

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Special Survey Thickness Measurement

Gauging for the 5, 10, 15, 20 and 25-year special (renewal) surveys and intermediate surveys, plus pre-docking steel estimates.

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CAS (Condition Assessment Scheme)

Thickness measurement and survey support for the IMO Condition Assessment Scheme, and what CAS asks of an older tanker today.

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CAP Thickness Measurement

Gauging and close-up survey data for a Condition Assessment Programme, the voluntary class service charterers ask for on older tankers and bulk carriers.

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ESP Gauging

Thickness measurement and close-up survey support for oil tankers, chemical tankers and bulk carriers under the ESP Code.

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Hull Structural Integrity

Substantial and excessive corrosion, pitting, grooving, buckling and fatigue cracks, with magnetic particle and penetrant crack detection.

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Ship Piping Inspection

Wall-thickness gauging of cargo, ballast, fuel, sea-water and fire-main piping, with minimum-wall checks and isometric sketches.

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Scrubber Piping Inspection

EGCS wash-water and overboard discharge piping, the hull penetration area and scrubber welds, checked between dockings.

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IHM (Inventory of Hazardous Materials)

IHM Part I surveys, sampling and maintenance for the EU Ship Recycling Regulation and the Hong Kong Convention.

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Marine NDT Services

Every NDT method we use on ships, from visual inspection and MPI to PAUT and ACFM, chosen by the defect you are looking for.

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Kuwait's Commercial Ports and Oil Terminals

The Kuwait Ports Authority runs the commercial ports. Shuwaikh Port, on Kuwait Bay beside Kuwait City, is the main gateway for containers, general cargo, vehicles and food imports, and is home to the HEISCO shipyard. Shuaiba Port, south of the city next to the Shuaiba industrial area, handles containers, bulk and general cargo for industry and construction. Kuwait relies heavily on imports for what it consumes, so a steady stream of container ships, multipurpose ships and bulk carriers calls at both ports through the year.

The oil side is larger. Kuwait Oil Company's export facilities at Mina Al Ahmadi load crude onto tankers, including very large crude carriers at the offshore loading points, while the refineries at Mina Al Ahmadi, Mina Abdullah and Al-Zour ship refined products. Al-Zour also has an LNG import terminal receiving LNG carriers. Kuwait Oil Tanker Company operates the national tanker fleet, and international tankers on spot and time charter make up the rest. Loading calls are short and terminal access is tightly controlled, so tanker gauging in Kuwait is usually done at anchorage before berthing or after the ship leaves the berth, where the operator and the terminal allow it.

What makes Kuwait distinctive for inspection is the environment at the head of the Gulf. Summer air temperatures are among the highest anywhere, the sea in Kuwait Bay and along the coast is shallow, warm and saline, and dust settles on decks and holds moisture overnight. Ships that trade into Kuwait regularly, such as regional tankers, feeders, offshore support vessels and harbour craft, show accelerated coating breakdown on decks and in ballast tanks, wastage in sea-water cooling lines and sea chests from warm, silty water, and corrosion in air pipes and deck fittings. On crude carriers, heat on the deck plating also drives corrosion under the deck in the cargo tanks, where readings on deck longitudinals and deckhead plating need extra attention.

Where Gauging Is Done in Kuwait

At Shuwaikh and Shuaiba, gauging is done alongside during cargo operations, with access arranged through the agent and the port's security. Container and general cargo calls allow deck, hatch, accessible tank and piping work; bulk carriers discharging over several days allow holds to be gauged as they empty. The HEISCO shipyard at Shuwaikh docks smaller ships on its floating dock and shiplift and repairs others afloat at its jetties, which makes it the place for in-dock gauging on offshore support vessels, tugs, landing craft and dredgers working in Kuwaiti waters.

For tankers, the anchorages off the oil terminals are the realistic workplace. Terminal rules at Mina Al Ahmadi and the other oil ports restrict work on board during loading, and gas-free cargo tanks are rare on a tanker arriving to load. Ballast tanks, deck structure, deck piping and void spaces can be gauged at anchor, and cargo-tank work is planned for a tank-cleaning or docking period. Large tankers from Kuwait generally dock in Bahrain, the UAE or further afield, and gauging in Kuwait can provide the first measured view of the ship before that docking.

  • Shuwaikh Port — deck, hatch cover, hold and piping gauging on container, general cargo and ro-ro ships during cargo operations
  • Shuaiba Port — hold, tank top and hopper gauging on bulk carriers discharging industrial and construction cargo
  • HEISCO shipyard, Shuwaikh — in-dock hull, sea chest and tank gauging on offshore support vessels, tugs, landing craft and dredgers
  • Mina Al Ahmadi anchorage — ballast tank, deck structure and deck piping gauging on crude tankers before or after loading, with terminal agreement
  • Al-Zour — hull, ballast tank and deck piping gauging on LNG carriers and product tankers, planned around terminal rules and the ship's stay
  • Kuwait Bay anchorages — pre-purchase and condition gauging on ships waiting for berths at the commercial ports

Thickness measurement through the survey cycle at Kuwait

Class rules set the survey cycle, and the cycle sets how much gauging a ship needs. A superintendent planning a call at Kuwait usually knows which survey is due; the table shows what the thickness measurement for each one typically involves. The exact extent comes from the class rules for the ship type and the surveyor attending, so the thickness measurement programme is agreed with the class before work starts.

SurveyWhen it fallsWhat the thickness measurement usually covers
Annual surveyEvery year, within three months of the anniversary dateGeneral examination. Gauging where the surveyor finds suspect areas or where substantial corrosion was recorded at an earlier survey.
Intermediate surveyIn place of the second or third annual surveySuspect areas, and on older ships and ESP ships selected ballast and cargo spaces with close-up survey; the extent grows with age.
Renewal survey No. 1Around 5 yearsThe first full baseline: suspect areas and selected plating and stiffeners, usually with modest steel renewal.
Renewal survey No. 2Around 10 yearsWider gauging of deck, bottom and side plating, transverse sections across the cargo area on ESP ships, and more close-up survey.
Renewal survey No. 3Around 15 yearsExtensive gauging of cargo and ballast tank structure and more transverse sections. The survey most likely to turn up steel renewal.
Renewal survey No. 4 and laterAround 20 and 25 yearsGauging extended to most structural members in cargo and ballast spaces. Charterers often add a Condition Assessment Programme.
Docking surveyTwice in each five-year periodBottom and side shell, sea chests, rudder and stern area while the hull is dry; suspect bottom plating gauged.

Port State Control, Vetting and Fuel Rules in Kuwait

Kuwait is a member of the Riyadh MoU, and port state control at its ports follows that regime's inspection practice. For tankers, though, the stricter examination usually comes from vetting: oil majors and terminal operators inspect tankers before accepting them, and older crude carriers face questions about structural condition that only measured data can answer. CAP, run by each class society as a voluntary condition rating, is commonly requested for tankers over about 15 years old, and its gauging scope covers cargo tank structure as well as ballast spaces.

The northern Gulf lies outside any emission control area, and the global 0.50% sulphur limit applies. Many of the crude carriers loading in Kuwait run scrubbers, and their wash-water and overboard piping is an established gauging item. Kuwait's national fleet, regional owners and international tanker operators all trade here, and the ships that call most often gain most from tracking corrosion over time. For ESP tankers, thickness measurement in Kuwait before the third renewal survey, or any later one, can show the owner the likely extent of steel renewal before the ship reaches the yard and the off-hire period is fixed.

Wherever a ship is outside a sulphur emission control area, the global 0.50% sulphur cap applies, and many of the ships calling at Kuwait meet it with an exhaust gas cleaning system rather than compliant fuel. Scrubber wash-water piping, the overboard discharge and the hull penetration around it corrode quickly in service, especially on open-loop systems, and are worth adding to the gauging scope.

Typical thickness gauging jobs in Kuwait

Ship inspection in Kuwait splits between the commercial ports, where cargo calls set the window, and the oil terminals, where terminal rules push most work to anchorage. Tankers dominate the requests that matter commercially, because vetting and CAP decide whether a ship gets its next cargo. On the commercial side, the requests are more often about docking plans and condition records for regional ships.

  • A crude tanker over 15 years old at the Mina Al Ahmadi anchorage: ballast tank and deck longitudinal gauging to prepare for a CAP assessment requested by a charterer
  • A product tanker waiting off Mina Abdullah: deck cargo lines and ballast tank boundaries gauged before loading, ahead of an oil-major vetting inspection
  • An offshore support vessel on HEISCO's floating dock at Shuwaikh: bottom plating, sea chests and double-bottom tanks gauged for its renewal docking
  • A bulk carrier discharging at Shuaiba: hold frames, hopper plating and tank top gauged hold by hold as the cargo comes out
  • An LNG carrier at anchorage off Al-Zour: hull and ballast tank gauging agreed with the terminal and the operator, to give a pre-docking steel estimate

How a thickness measurement job runs at Kuwait

A gauging job at Kuwait runs the same way whatever the ship type. The sequence below is what the superintendent, the attending surveyor and the yard can expect from us.

Kuwait International Airport has direct flights from several Indian cities, and the commercial ports and oil terminals are all reached by road from Kuwait City. Shuwaikh and Shuaiba need port passes arranged by the ship's agent through the Kuwait Ports Authority; the oil terminals add their own security and safety induction, and anchorage work needs a launch booked by the agent. Indian technicians travel on Kuwaiti business visit visas, which we apply for once the ship's dates are firm. For any work at or off an oil terminal, we confirm access in writing before the team travels.

  • 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.

Who does the work, and when class approval applies

Atlantis mobilises its inspection team from India to the vessel, for each job. There is no office or agent at the port; the team travels to the ship, which is why the planning step comes first. Work is planned and supervised by our Responsible NDT Level III, the founder, who holds ASNT NDT Level III in UT, RT, MT, PT and VT and has more than eleven years of international field experience. Technicians are qualified and certified under the company's written practice to ASNT SNT-TC-1A, and Atlantis is certified to ISO 9001 and ISO 14001.

Thickness measurement that a classification society credits to a class survey has to be carried out by a firm approved by that society under IACS UR Z17. Atlantis is in the process of obtaining UR Z17 approval from DNV, Lloyd's Register and ABS. Until a certificate is issued, the readings we take are for the owner's own decisions, not for credit to a class survey, so tell us the vessel's class and the survey due when you enquire and we set the scope for the right purpose. Owner's and charterer's condition gauging, pre-docking steel estimates, pre-purchase and on-hire or off-hire gauging, and scrubber and piping condition checks between surveys do not need class approval.

Governing codes and standards

  • IACS UR Z7 hull classification surveys
  • IACS UR Z10.1 to Z10.5 (oil tankers, bulk carriers, chemical tankers, double-hull and double-skin ships)
  • IACS UR Z17 approval of service suppliers
  • SOLAS chapter XI-1 regulation 2 and the 2011 ESP Code
  • MARPOL Annex VI regulation 14 and the 2021 EGCS Guidelines (MEPC.340(77))
  • The rules of the vessel's classification society

What you receive

  • Thickness measurement report on the class formats, with sketches
  • Summary of substantial and excessive corrosion against allowable margins
  • Pitting and grooving records with depth and extent
  • Piping wall-thickness tables with isometric sketches
  • Magnetic particle or penetrant crack-detection reports
  • Gauge calibration records and technician certificates

Industries served

  • Crude oil tankers including VLCCs
  • Product tankers
  • LNG carriers
  • Container ships
  • General cargo and ro-ro ships
  • Bulk carriers
  • Offshore support vessels
  • Tugs, dredgers and harbour craft

Frequently asked questions

Can you gauge a tanker at the Mina Al Ahmadi terminal during loading?

Generally not during loading itself. Terminal safety rules limit work on board, and the cargo tanks of a tanker arriving to load are inerted rather than gas-free. We gauge ballast tanks, deck structure and deck piping at anchorage before or after the loading call, with the terminal's and the operator's agreement, and plan cargo-tank readings for a tank-cleaning period or a docking.

Is CAP gauging something you can help prepare for in Kuwait?

Yes. Owners of older crude and product tankers trading out of Kuwait often need CAP to keep vetting acceptance. We can gauge ballast tanks, deck and accessible structure in Kuwait to show the owner where the ship stands, so that the CAP survey and any steel renewal can be planned before the charterer's deadline rather than after it.

Does the summer heat in Kuwait affect when you can work?

Yes. Kuwait restricts outdoor work in the middle of the day during summer, and exposed steel decks get too hot for reliable readings and safe handling in any case. We take deck and shell readings early and late in the day and use the hottest hours for work inside tanks and enclosed spaces, which keeps the job moving within the rules.

Can you work on ships at the HEISCO shipyard in Shuwaikh?

Yes, where the owner books us for the ship and the yard grants access. HEISCO docks and repairs offshore support vessels, tugs, landing craft, dredgers and similar ships, and in-dock gauging there covers bottom plating, sea chests and double-bottom tanks. We work under the yard's permit system and coordinate with the class surveyor's attendance, so the readings are ready when the surveyor needs them.

Does thickness measurement at Kuwait need class approval?

Thickness measurement that a classification society credits to a class survey has to be carried out by a firm approved by that society under IACS UR Z17. Atlantis is in the process of obtaining UR Z17 approval from DNV, Lloyd's Register and ABS. Until a certificate is issued, the readings we take are for the owner's own decisions, not for credit to a class survey, so tell us the vessel's class and the survey due when you enquire and we set the scope for the right purpose. Owner's and charterer's condition gauging, pre-docking steel estimates, pre-purchase and on-hire or off-hire gauging, and scrubber and piping condition checks between surveys do not need class approval.

Planning a survey or a drydock?

Send the vessel name or IMO number, the class, the survey due and the port. We reply with the scope, the mobilisation plan and a quote for that vessel.

Request a Quote

Request a ship gauging quote

Send the vessel name or IMO number, the class society, the survey due and the port. We reply with the scope, the mobilisation plan and a quote for that vessel.








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