Material Certificate 3.1 — More Than Paperwork
In a NORSOK or DNV project, buying the right steel is only part of the job. You may also need to prove exactly what material was used, where it came from and that its documented properties match the project requirements.
That is why EN 10204 Type 3.1 material certificates are so common in offshore, marine and other safety-critical fabrication.
PROOF OF WHAT YOU BOUGHT
A 3.1 certificate provides specific inspection results for the supplied material in accordance with EN 10204. Depending on the material and applicable specification, this can include chemical composition, mechanical properties and other required test results.
It turns “this is S355” into documented material information that can be checked against the purchase specification.
TRACEABILITY INTO THE FABRICATION
The certificate alone is not enough. The material identification must remain connected to the component as plate, pipe or sections move through receiving, cutting and fabrication.
A heat or cast number provides the link:
Material → Heat number → 3.1 certificate → Inspection results
Lose that link during fabrication, and proving the origin of a critical component later can become difficult.
DOCUMENTATION WHEN IT MATTERS
DNV rules, NORSOK requirements and project specifications can place different documentation requirements on materials depending on the equipment, application and criticality.
For components where material properties must be verified, the 3.1 certificate becomes part of a wider documentation package alongside drawings, welding documentation, inspection records, NDT and testing.
Traceability is easiest to protect before fabrication starts. Material certificates, identification and fabrication records need to remain connected throughout the job.
Imagine a load-bearing structure is already fabricated. Welding is complete, NDT has been performed and the equipment is approaching FAT. Then someone asks for the material traceability records.
The steel may be perfectly suitable. But if a critical plate cannot be linked back to its certificate, proving that afterwards can require additional investigation, testing, documentation or corrective work. What started as a paperwork issue can suddenly affect the delivery schedule.
This is why material documentation should be considered before purchasing and fabrication begin. The applicable standard, project specification and certification basis determine what documentation is required. Material must then be purchased accordingly, certificates reviewed, identification recorded and traceability maintained through fabrication.
For international companies entering a Norwegian offshore or marine project, these requirements can be unfamiliar. GravityX brings engineering, procurement and fabrication resources together around the actual project requirements — so material documentation and traceability are built into the delivery rather than chased at the end.
