ClassNK releases SCR system guidelines

Tokyo based classification society Nippon Kaiji Kyokai (ClassNK) has released its new Guidelines for SCR (Selective Catalytic Reduction) Systems and Reductant Agent Supply Systems.

Amendments to MARPOL that entered into force on July 1, 2010 require an 80 percent reduction in NOx emissions from diesel engines from 2016.  To meet this requirement, SCR systems  are expected to find wide use in the maritime industry in the near future. However, clear guidelines and safety protocols for installing, maintaining, and certifying these systems are essential to bringing SCR technology into practical use.

ClassNK’s new guidelines have been developed in order to support the industry wide effort to safely implement these systems on commercial vessels.

“In developing this guideline, we conducted a study of all relevant equipment, including reductant agent tank arrangements and piping specifications of SCR systems, in order to determine which measures are necessary for the safe operation of such systems” says Yukihito Fujinami, General Manager of ClassNK’s Machinery Rules Development Department. “In addition to summarizing standard design specifications based on the IBC Code, IGC Code and Rules for Cargo Refrigerating Installations, the guideline also provides specific requirements for systems using reduction agents that require safe storage specifications, such as urea and ammonia, and we believe the guidelines will be an incredibly useful tool for manufacturers, shipyards, and owners looking to install such systems on their vessels.”

November 8, 2011