Our services
NDT, Certification & Surveillance
ONB provides quality and conformity assessment services for industry. From welded fabrication to steel structures, from shipment to project site, we independently inspect and report on product compliance with standards.
Non-destructive testing (NDT)
Testing, evaluation and approval
| Method | Used for | Main standards |
|---|---|---|
| Visual Testing (VT) | Surface discontinuities; borescope for inaccessible areas | TS EN ISO 17637, TS EN ISO 5817, ASME, API 650/653 |
| Radiographic Testing (RT) | Volumetric defects inside welds; permanent record | TS EN ISO 17636-1, TS EN ISO 10675-1, API 1104 |
| Ultrasonic Testing (UT) | Internal defects and thickness measurement | Project specification and applicable standards |
| Magnetic Particle Testing (MT) | Surface and near-surface cracks in ferromagnetic materials | TS EN ISO 17638, TS EN ISO 9934 |
| Penetrant Testing (PT) | Surface-breaking cracks in all materials | TS EN ISO 3452-1, TS EN ISO 23277 |
Certification
- Welder (welding personnel) certification
- Welding procedure qualification (WPQR) certification
Project surveillance
By tracking the standards that govern fabrication, design and erection (e.g. EN 1090-2 for steel structures) before the project starts, we give the project owner the chance to act early.
Shipment surveillance
Pre-loading checks of product, quantity and conformity — independent assurance for purchases from China and other countries.
Linked to sourcing
What sets us apart from an ordinary supplier
For the machinery, steel and equipment we supply, pre-shipment surveillance is carried out by our own inspection team — so your goods are independently checked and documented before they leave.
Need testing or surveillance?
Tell us the material, method and standard, and we will prepare a plan for you.