How Are Additive Manufactured Spare Parts Certified for Maritime and Energy Use?

Additively manufactured spare parts are certified through classification society approval, qualified manufacturing processes, certified material feedstock, and part-level verification covering dimensional inspection, non-destructive testing, and material certification to EN 10204.
Certification applies at three levels: the manufacturer, the process, and the individual part.
Process qualification is done once; part verification happens every build. This is what allows certified parts to be produced on demand without requalifying from scratch.
DNV-ST-B203 and equivalent ABS requirements define how additive processes and parts are assessed for marine and offshore use.
Parts produced from OEM-controlled design data carry full traceability and certification, which reverse-engineered grey market parts cannot match.

Additive manufactured spare parts are certified for maritime and energy use through a combination of classification society approval (such as DNV, ABS), qualified manufacturing processes, certified material feedstock, and part-level verification - including dimensional inspection, non-destructive testing, and material certification to EN 10204. Certification applies to the manufacturer, the process, and the part itself.

Additive manufacturing is no longer a future technology for the maritime and energy industry. It is a proven route to producing functional, safety-relevant spare parts on-demand. But for ship/asset owners, technical superintendents, and OEMs, one question matters above all others: how do you know an additive manufactured part is fit for service?

The answer lies in a certification framework that is more rigorous and more mature than many in the industry realise.

What standards apply to additively manufactured maritime and energy parts?

Three layers of standards govern additive manufactured parts in the maritime and energy applications:

Classification society rules. DNV-ST-B203 sets out requirements for the additive manufacturing of metallic parts, while ABS publishes equivalent requirements and certification frameworks. These rules define how AM processes and parts are assessed for marine and offshore use.

Material and quality standards. ISO 9001 governs the quality management system. EN 10204 defines the inspection documentation that accompanies every part. The most common certificate issued by the manufacturer's independent inspection function is a 3.1 certificate, or a 3.2 certificate countersigned by a third-party surveyor. ISO/ASTM standards define AM terminology, processes, and qualification principles.

Application-specific standards. For energy-sector components, API specifications apply. For pressure-containing or load-bearing parts, the relevant design codes remain in force regardless of how the part is manufactured.

How does process qualification differ from part qualification?

This distinction is central to how AM certification works and it is what makes on-demand manufacturing scalable.

Process qualification demonstrates that a specific combination of machine, material, and parameter set reliably produces material with known, repeatable properties. For laser powder bed fusion (LPBF), this means qualifying the laser parameters, build atmosphere, powder specification, and post-processing route. For wire arc additive manufacturing (WAAM) and laser metal deposition (LMD), it means qualifying deposition parameters, interpass controls, and heat treatment. Once qualified, the process produces predictable results every time it runs within its qualified window.

Part qualification demonstrates that a specific component, built with a qualified process, meets its functional requirements in terms of geometry, mechanical properties, surface condition, and performance in service. This typically involves first-article inspection, destructive testing of witness specimens built alongside the part, and verification against the original design intent.

Because the process is qualified once and the part is verified every time, certified parts can be manufactured on-demand, close to the point of need, without requalification from scratch. Overall, this forms the foundation of a digital inventory.

How is an additively manufactured part verified before delivery?

Every part delivered should pass through a verification sequence designed to provide objective evidence of conformity:

Material traceability. Powder or wire feedstock is certified, batch-tracked, and stored under controlled conditions. This allows every part to be traced back to its material batch.
In-process monitoring. Build parameters are logged throughout manufacturing and this creates a digital record of how the part was made.
Non-destructive testing. Depending on the part's criticality, NDT methods such as dye penetrant, ultrasonic, or radiographic testing confirm internal and surface integrity.
Mechanical testing. Witness specimens built in the same job are tested for tensile strength, hardness, and relevant impact properties.
Documentation. The part ships with its EN 10204 certificate and a complete quality documentation, giving the end user the same documentary assurance they would expect from a conventionally manufactured component.

Can additively manufactured parts replace castings and forgings?

This is possible when the application, material, and qualification route support it. Additively manufactured parts routinely match or exceed the mechanical properties of cast equivalents, particularly in fatigue-sensitive applications where AM's fine microstructure offers advantages.

The more important point is who manufactures them. When a part is produced from the OEM's own digital design data, with the OEM's specifications embedded in the qualified process, the result is a genuine part. This part is digitally manufactured, fully certified, and protected against the gray-market alternatives that put vessels and reputations at risk.

Frequently Asked Questions

Are additively manufactured parts approved by classification societies?

Yes. DNV, ABS, etc, all operate certification schemes for additively manufactured parts and approval programmes for AM parts production. These AM parts carry the same class acceptance as conventionally manufactured equivalents.

Which additive technologies are used for maritime and energy spare parts?

Some examples include: Laser powder bed fusion (LPBF) for complex, high-precision components; wire arc additive manufacturing (WAAM) for large structural parts; and laser metal deposition (LMD) for repair, cladding, and feature addition on existing components.

Do additively manufactured parts meet the same standards as cast or forged parts?

The functional requirements of an AM part or cast/forged parts are identical. The AM part must meet the same design codes, material properties, and inspection criteria.Although the manufacturing method differs, the AM process is qualified and controlled.

Can certified additively manufactured parts be produced locally?

Yes. This is because qualification is attached to the process rather than a single factory, and certified parts can be manufactured across a qualified global network. Producing parts locally can reduce lead times, freight costs, and emissions.

How does certification protect against counterfeit parts?

Every certified AM part carries full material traceability, a logged production record, and inspection documentation tied to the original design data. That digital thread is something gray-market parts cannot replicate and it provides the asset operators the assurance that the AM parts manufactured are genuine OEM parts.

Key Takeaways

Additively manufactured parts are certified at three levels: the manufacturer, the qualified process, and the individual part.
DNV-ST-B203 and equivalent ABS requirements govern additive manufacturing for marine and offshore use, alongside API specifications for energy-sector components.
Process qualification happens once; part verification happens on every build. This is what makes certified on-demand production possible.
Every delivered part ships with material traceability, a logged production record, NDT results, and an EN 10204 certificate.
Parts produced from OEM-controlled design data carry traceability and certification that reverse-engineered grey market parts cannot match.