DNV, a risk management and quality assurance provider based in Oslo, Norway, has released a new edition of its standard DNV-ST-B203 for Additive Manufacturing of metallic parts. The standard, which is the result of a joint industry project, now includes baseline requirements for the most established AM technologies for metal parts, and welcomes new concepts for quality assurance for data-driven manufacturing.
The new edition of DNV-ST-B203 includes qualification and production requirements for three new AM technologies, in addition to the two technologies covered in the first edition. The new edition includes provisions for the most established metal AM technologies:
- Directed Energy Deposition using electric arc, and laser beam (DED-Arc and DED-LB)
- Laser or Electron Beam Powder Bed Fusion (PBF-LB and PBF-EB, respectively)
- Binder Jetting (BJT)
Additionally, the standard now includes:
- Requirements for the qualification of combined manufacturing methods, such as AM features on substrate shapes
- Defined acceptance criteria for non-destructive testing
- Guidance on the definition of part families, that may extend the validity of qualifications
- Guidance on the choice of criticality classes (AMC) that may help end-users to choose the right level of quality assurance for the given application
- Guidance on unconventional inspection techniques and in-process monitoring, that may help manufacturers to improve efficiency and quality, and unlock the design freedom of additive manufacturing
The standard was the first internationally accepted framework for producing and using high quality additively manufactured metal parts for the oil & gas, maritime and energy industries. It introduced approaches to manage the quality of additively manufactured metal parts, with each approach adapted based on the criticality of a part’s function.
“Additive Manufacturing offers a way of reducing waste of materials from excessive machining operations,” stated Lucy Craig, Director, Growth, Innovation & Digitalization, Energy Systems at DNV. “The digital nature of Additive Manufacturing also enables new ways of ensuring quality control, by monitoring through sensors and logging of production trends – which, in turn, may lead to increased confidence in a part’s quality. One of the basic assumptions for achieving these objectives are standardised levels of quality.”
The new edition was made in a joint industry project (JIP) run by DNV’s Technology Centre Oslo. The JIP is called ProGRAM JIP phase 2 and was developed by running practical case studies in parallel to the development of the standard. ProGRAM JIP phase 2 included companies representing end-users, contractors and equipment manufacturers, part manufacturers, AM machine providers and suppliers of material feedstock.
Stian Gurrik, Project Manager ProGRAM JIP phase 3, Technology Centre Oslo, Energy Systems at DNV, added, “The learnings from the case studies helped the project to identify important activities in the qualification and production setting. In addition to assisting the work on the development of the standard, the project was able to create parts that can be put into service. And by comparing the resource consumption from part repair with that of conventional part replacement, the project showed that there could be a significant environmental benefit from enabling repair of worn parts with Additive Manufacturing. The work also continues in ProGRAM JIP phase 3, started in June 2022 and will run into 2024.”