DNV 2.7-1 Periodic Inspection
WHAT WE DO
The first certificate is not the end of an offshore container’s compliance story. Through service, the unit is lifted, landed, transported, loaded and exposed to weather. Its condition changes, and repairs or modifications can change the basis on which it was originally certified.
Periodic inspection is therefore about more than keeping a date current. It is about establishing whether the equipment remains in a condition consistent with safe offshore use.
Condition matters more than appearance
Inspection considers the relevant structural and functional features of the container. Damage near a lifting point or primary member has a different significance from cosmetic damage to a non-structural surface. The useful question is whether wear, corrosion or damage affects the load path, handling or certified configuration.
Repairs need an engineering route
A repair can restore equipment to service. An uncontrolled repair can also change material, geometry, weld details or load transfer without anyone revisiting the design basis. Structural repairs and modifications should therefore be assessed before cutting or welding begins.
Records are part of the equipment
Inspection reports and certification records form the history of the unit. When equipment changes project, owner or operating location, incomplete records can become a mobilisation problem even when the steel itself is sound.
The cheapest repair can become the expensive option
When damage is found, the immediate pressure is often to get the container repaired and back into service. That makes a quick workshop fix attractive.
The real risk is not the repair time alone. It is making a physical change without understanding whether the affected area belongs to the primary structure, whether the material and weld route remain appropriate, and what inspection or documentation needs to follow.
A small repair managed correctly can stay small. The same repair performed first and engineered afterward can create additional NDT, rework, documentation recovery or a new certification discussion.
The better sequence is to identify the defect, establish its structural significance, define the repair route, execute it under the required controls and close the records while the work is still traceable.
For new equipment, our DNV 2.7-1 testing and certification guide explains how that equipment history begins. If a modification affects the structural concept, revisit the DNV 2.7-1 design basis before fabrication.
GravityX combines engineering support with compliance-driven execution where repair, modification and documentation need to move together.
Assess the actual condition
Control repairs before welding
