Non-destructive testing | NDT
Non-destructive testing (NDT), or niet-destructief onderzoek (NDO) in Dutch, assesses the integrity, quality, and properties of materials, components, and systems without damage. It detects cracks, weaknesses, or corrosion, keeps objects operational, and confirms acceptance criteria for safe operations. Welds, joints, and structures remain verified and ready for use. Control Union delivers fast on-site NDO/NDT with multi-skilled inspectors in key Dutch ports: Rotterdam, IJmuiden, Den Helder, and Eemshaven.
Safety and certainty with NDT inspection
At Control Union, you get one dedicated point of contact for all your inspections. This single point of contact applies recognized standards. Receive clear, substantiated pass-or-fail reports for every weld or component. This ensures fast certainty and effortless compliance.
Protect assets, maintain compliance and gain operational certainty
Preserve manufacturer warranty
Manufacturers often require periodic NDT at set intervals. Meeting those requirements on schedule protects warranty coverage and avoids costly disputes over equipment failure responsibility.
Fully independent results
Control Union operates independently from insurers and maintenance contractors. Inspection findings are 100% objective, free from conflicts of interest, and stand up to third-party audits.
Test without disassembly or downtime
Advanced techniques such as phased array scanning allow inspection of bolted connections and shafts without removal. Assets stay in place, and operations keep running during the inspection.
Level 3 NDT strategic problem-solving
Experienced Level 3 NDT specialists advise on complex inspection challenges, select the right technique for difficult materials or geometries, and approve procedures that field inspectors execute.
Prompt availability at major Dutch ports
Inspectors are based near Eemshaven, Den Helder, IJmuiden, Rotterdam, and Vlissingen. Whichever port a vessel enters, Control Union mobilises locally and reduces waiting time.
The proof to your promise
Verified assets, faster decisions
Control Union combines multi-skilled inspectors, instant digital reporting and flexible scheduling to keep assets verified without operational delays.
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Multi-skilled inspectors who hold NDT, offshore container and lifting equipment qualifications reduce the number of specialists and helicopter flights needed per offshore visit.
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Tablet-based inspections produce finalised reports on location, often before the inspection team leaves site, so vessels and facilities avoid waiting for paperwork.
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Urgent and weekend service are available, allowing inspection needs to be met without postponing operations to the next working day.
Conventional NDT services
Reliable inspection techniques for detecting defects, material deviations, and structural risks.
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Visual testing (VT): Thorough visual inspections to identify surface defects and abnormalities
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Magnetic particle testing (MT): Detecting surface and near-surface flaws using magnetic fields and magnetic particles
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Eddy current testing (ET): Evaluating conductive materials for cracks, corrosion, and material thickness variations
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Penetrant testing (PT): Detecting surface defects by applying a penetrating liquid and inspecting for indications
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Ultrasonic testing (UT): Utilizing high-frequency sound waves to identify internal flaws
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Ultrasonic thickness measurements (UTM): Utilizing high-frequency sound waves to measure material thickness
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Hardness testing (HT): Assessing the hardness properties of materials to determine their strength and resistance
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Positive material identification (PMI): Analyzing the chemical composition of materials to ensure compliance and integrity
Proof to your promise
Frequently asked questions
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Local knowledge
Global coverage
Control Union drives global trade forward. As an international and independent partner, we support traders, producers, brands, and logistics service providers in managing risk and safeguarding quality at every step of the supply chain.
From raw material to final product, from processes and systems to installations, we provide insight, assurance, and trust in every link of the chain. We do this through inspections and audits, certification and verification, laboratory analyses, and pest management.
Our global network of experts are embedded in international supply chains across dozens of sectors, including agriculture, food & feed, energy & biofuels, forestry, construction & infrastructure, textiles, maritime, and on- and offshore.
Together, we build future-proof supply chains and confidence in global trade!