Sonihull is first US antifouling to achieve ATEX approval

Sonihull is first US antifouling to achieve ATEX approval
From L-R: Darren Jones, MD of NRG Marine Limited, David Stubbings, technical director of CML (Certification Management Limited), and Dominic Findlow, technical director of NRG Marine Limited

Ultrasonic antifouling system Sonihull has received certification compliance with 94/9/EC ATEX Approval, the regulation applied to all equipment intended for use in explosive atmospheres.

Sonihull is the first ultrasonic antifouling system to be awarded ATEX certification. The certification confirms its use for ships, particularly LNG carriers, oil rigs, FPSOs, and other petrochemical applications that require biocide-free antifouling solutions in hazardous areas.

“Sonihull is ideal for protecting the raw seawater [RSW] cooling-systems on LNG vaporisers,” said Dominic Findlow, Sonihull’s technical director. “Our transducers can be fitted in-situ to the dry side of the RSW handling equipment and pipework without the drilling or welding associated with impressed-current or dosing systems. Once installed, there’s no regular maintenance to replace costly anodes.”

Sonihull’s ultrasound transducers have been approved for use in Zone 0 and the control box has been certified for use in Zone 1 and Zone 2 applications if being fitted in a separate cabinet.

The Sonihull ultrasonic antifouling system provides effective biofouling control in RSW handling equipment, without biocides, metal compounds or microplastics.

The system is also easy to install, as the ultrasound transducers are bonded to the dry-side of the RSW handling equipment or pipework. This removes the need for any drilling or welding, and the requirement for extra Classification surveys, pressure-testing and documentation.

The Sonihull system can reportedly reduce capital and MRO costs by up to 95 per cent compared to similar impressed-current antifouling systems. Sonihull will reduce maintenance costs, extend maintenance intervals and can facilitate quick mothballing and re-activation without the need to dry-dock.