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ABS approves 3D printed spare parts after successful testing on board an oil tanker

ABS, ConocoPhillips Polar Tankers, Sembcorp Marine and 3D Metalforge complete landmark &ldquo additive manufacturing&rdquo project

Singapore, 24 November 2021: ABS, ConocoPhillips Polar Tankers, Sembcorp Marine Ltd and 3D Metalforge has taken a significant and tangible step to make additive manufacturing (AM) &ndash also known as 3D printing &ndash a reality in the marine industry through a joint development project. Parts fabricated by AM and installed on an oil tanker by Sembcorp Marine six months ago have been validated to be in good working condition.

This pioneering AM project started in February 2021 with the fabrication and lab-testing of functional additive manufactured parts, which were then installed on board the oil tanker  Polar  Endeavour. After six months in operation, all parts have since been retrieved and inspected by the vessel&rsquo s crew, followed by a remote survey by ABS.

Mr Patrick Ryan, ABS Senior Vice President, Global Engineering and Technology, said, &ldquo We are delighted with the performance of the parts and the successful completion of the project. It&rsquo s an important step forward for a technology that certainly has a significant role to play in the future of the marine industry. ABS is committed to ensuring these types of parts are introduced without compromising safety.&rdquo

Additive Manufacturing or 3D printing is the fabrication of parts by adding material layer by layer. It means products and components can be fabricated locally or potentially on board ships and offshore assets, shrinking the supply chain and lead times for specialised and complex parts, introducing new efficiencies driven by design innovation, reduced manufacturing time, and improvements in parts availability.

Traditional parts used in shipbuilding and repair are manufactured via casting or forging techniques. For this project, the consortium utilised AM to fabricate three types of parts that meet or may even exceed conventionally manufactured products in terms of quality. ABS has now approved these additive manufactured spare parts after successful onboard testing on an oil tanker.

The three parts were:

• Gear set and gear shaft for boiler fuel supply pump: The gear set comprises a drive gear which rotates the idle gear connected to the pump which creates a suction force to fill the void with fluid. The shaft connects the impeller to the motor/engine, which is the power source.
• Flexible coupling for marine sanitation devices pump: The flexible coupling connects a driver shaft to a driven shaft for power transmission. The two shafts include metal components for two coupling sleeves and non-metallic components for coupling spider which permit misalignment adjustments.
• An ejector nozzle for fresh water generator which increases the fluid velocity to transform high static pressure into velocity pressure.

Mr Robert Noyer, ConocoPhillips Polar Tankers Engineering Superintendent, said, &ldquo The superior performance of these parts in service is a testament to the rigorous engineering, manufacturing and post-production testing put in place by the team involved with this venture. We look forward to future opportunities to support our vessels with this technology.&rdquo

Sembcorp Marine Head of Research & Development, Mr Simon Kuik, said, &ldquo The success of this project augurs well for the adoption of AM in the marine industry. Through AM, Sembcorp Marine is able to customise parts for our customers and reduce material wastage and remove supply chain inefficiencies. This augments our value proposition as a one-stop innovative solutions provider for the offshore, marine and energy industries and affirms our sustainability ethos.&rdquo