T02

CIRCULAR TO MASTER ‘T’-02

DATE: 21 NOVEMBER 2012

APPLICABLE TO ALL VESSELS

Sub: Maintenance of the NOx Record Book of Engine Parameters

The following guidelines are aimed at highlighting the importance of maintaining a NOx Record Book of Engine Parameters and guiding ship’s staff towards proper completion of the same. This Record Book is required to be maintained if the Engine Parameter check method is selected in the marine diesel engine’s Technical File, as an approved method of on-board verification of continued compliance of the engine’s emissions with the applicable NOx limit. Governing regulations are MARPOL Annex VI regulation 13 and Resolution MEPC.177(58) – NOx Technical Code 2008. Such on-board verification is done during Renewal, Annual and Intermediate surveys to confirm that the Engine International Air Pollution Prevention certificate can continue to be maintained in respect of each marine diesel engine covered by the regulations. All marine diesel engines of power output greater than 150 KW and installed on a ship constructed on or after 1st Jan 2000 are covered by these regulations; however engines that are to be used solely for emergency purposes, including emergency generator and lifeboat engines do not fall within the purview of these regulations. The following documentation is required to be maintained on board a ship in respect of each marine diesel engine to which the regulations apply and which are required to undergo verification using the engine parameter check method: 1) A Technical File, prepared by the manufacturer, that identifies the engine’s components, settings or operating values that influence exhaust emissions and must be checked to ensure compliance. The Technical File shall contain all applicable information, relevant to the NOx emission performance of the engine, on the designated engine’s components, adjustable features and parameters at the time of the engine’s pre-certification. For further details of

Page 1 of 6

the contents of the Technical File, regulation 2.4.1 of the NOx Technical Code 2008 should be consulted. Depending on the specific design of the particular engine, the Technical File may describe different on-board NOxinfluencing modifications and adjustments including the engine parameters as follows: • • • • • • • • • • • • • • •

Injection timing Cylinder head Cylinder liner Piston Connecting Rod Sealing ring Fuel injection pump Fuel injection valve Fuel injection nozzle Camshaft Turbocharger Compressor wheel Diffuser Nozzle ring Turbine rotor Air cooler

2) A Record Book of Engine parameters for recording all changes, including like-for-like replacements, and adjustments within the approved ranges made relative to an engine’s components and settings. So, all replacements and adjustments, including normal maintenance of parts considered to influence the NOx emission levels, i.e. those listed in the engine’s Technical File, need to be recorded in the Record Book of Engine Parameters. The aim of recording all changes is to maintain a historical record to help determine if there have been any deviations from the specifications in the engine’s Technical File which may cause the engine’s NOx emission levels to vary outside the approved range. To summarize, the following needs to be recorded in the Record Book: •

Any changes affecting the designated engine parameters, including adjustments, parts replacements (with parts with Page 2 of 6

a different IMO number from the modifications to engine parts, chronologically. •

orogonal part) and must be recorded

Like-for-like replacements (for example injector changes with the same IMO number or Piston changes with the same IMO number) and adjustments within the approved ranges.

The following pages contain examples of sample entries and entries made on board from the Engine Record Book of a Main Engine.

______________________ SANJAY CHANDRA TECHNICAL DIRECTOR

Page 3 of 6

Page 4 of 6

Page 5 of 6

Page 6 of 6