The Future of Additive Manufacturing in the Maritime Industry

The International Association of Classification Societies (IACS) has recently released a groundbreaking recommendation, Rec.186, aimed at standardizing the integration of additive manufacturing (AM) – also known as 3D printing – in marine and offshore applications. This development comes as the maritime industry continues to embrace technological advancements to improve efficiency and sustainability in shipbuilding and offshore operations.

The Evolution of Additive Manufacturing

Additive Manufacturing has revolutionized traditional manufacturing processes by enabling the creation of objects from digital 3D models through layer-by-layer printing. This innovative approach offers greater design flexibility, reduced material waste, and the potential for on-demand production. Unlike conventional methods like casting and welding, AM allows for localized production and customization, making it ideal for specialized marine and offshore applications.

Rec. 186: A Standardized Approach

Rec. 186 outlines a comprehensive framework for the qualification, approval, and certification of additively manufactured metallic parts. It covers key aspects of the AM process, including part design, feedstock selection, AM processes, post-processing, and inspection/testing. By aligning with international standards such as ISO/ASTM 52900 and AWS D20.1, the recommendation ensures equivalent reliability and safety in line with existing Unified Requirements.

Key Areas of Focus

Rec. 186 addresses critical areas to facilitate the safe adoption of AM technology in marine contexts:

• Scope of AM Process: Covers Powder Bed Fusion, Directed Energy Deposition, and Binder Jetting with detailed process-specific parameters.
• Criticality Levels and Testing: Introduces tiered testing levels (AM Levels 1-3) for customized testing based on application criticality.
• Feedstock and Material Standards: Specifies rigorous qualification processes for AM feedstocks, including recycling protocols for sustainability.
• Part Design and Qualification: Includes provisions for design optimization and pre-build simulation for robust performance under marine conditions.
• Inspection and Non-Destructive Testing: Addresses potential imperfections through advanced NDT methods like CT scans.

Ensuring Safety and Innovation

Rec. 186 establishes a robust verification and certification framework to ensure the safe and effective use of AM technology in critical marine applications. IACS remains committed to collaborating with stakeholders to expand the application of AM in safety-critical marine components, safeguarding the benefits of additive manufacturing in the maritime sector.

In a statement, Alexandre Astruc, Chair of IACS’ Expert Group on Materials & Welding, emphasized the importance of standardized frameworks for AM technology in the marine industry. He highlighted the significance of safeguarding the benefits offered by additive manufacturing through a structured verification and certification process that instills confidence in all stakeholders.

As the maritime industry embraces technological advancements, the integration of additive manufacturing through standardized recommendations like Rec. 186 paves the way for innovative, efficient, and sustainable solutions in shipbuilding and offshore operations.