Marine SCR – Tier III Certification

To comply with IMO Tier III emissions limits, marine diesel engine systems fitted with SCR must fulfil the surveying and certification requirements laid out in MARPOL Annex VI Resolution MEPC.198(62) and the NOx Technical Code 2008. Thus, the SCR is not certified as a stand-alone technology but as part of the engine system. Seagoing ships are required to obtain an Engine International Air Pollution Prevention (EIAPP) Certificate and there are two ways to accomplish this:

  1. The engine fitted with SCR is tested on bench, certified and sent to shipyard (Scheme A)
  2. The engine and SCR are tested separately due to restrictions in size (Scheme B)