5.6 EGC System Technical Manual “Scheme B” (ETM-B)
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Resolutions - Marine Environment Protection Committee - Resolution MEPC.184(59) – 2009 Guidelines for Exhaust Gas Cleaning Systems – (adopted on 17 July 2009) - Annex – 2009 Guidelines for Exhaust Gas Cleaning Systems - 5 Scheme B – EGC System Approval, Survey and Certification Using Continuous Monitoring of SOx Emissions - 5.6 EGC System Technical Manual “Scheme B” (ETM-B)

5.6 EGC System Technical Manual “Scheme B” (ETM-B)

  5.6.1 Each EGC unit should be supplied with an ETM-B provided by the Manufacturer. This ETM-B should, as a minimum, contain the following information:

  • (a) the identification of the unit (manufacturer, model/type, serial number and other details as necessary) including a description of the unit and any required ancillary systems;

  • (b) the operating limits, or range of operating values, for which the unit is certified. These should, as a minimum, include:

    • (i) maximum and, if applicable, minimum mass flow rate of exhaust gas;

    • (ii) the power, type and other relevant parameters of the fuel oil combustion unit for which the EGC unit is to be fitted. In the cases of boilers, the maximum air/fuel ratio at 100% load should also be given. In the cases of diesel engines whether the engine is of 2 or 4-stroke cycle;

    • (iii) maximum and minimum washwater flow rate, inlet pressures and minimum inlet water alkalinity (ISO 9963-1-2);

    • (iv) exhaust gas inlet temperature ranges and maximum and minimum exhaust gas outlet temperature with the EGC unit in operation;

    • (v) exhaust gas differential pressure range and the maximum exhaust gas inlet pressure with the fuel oil combustion unit operating at MCR or 80% of power rating whichever is appropriate;

    • (vi) salinity levels or fresh water elements necessary to provide adequate neutralizing agents; and

    • (vii) other parameters as necessary concerning the operation of the EGC unit;

  • (c) any requirements or restrictions applicable to the EGC unit or associated equipment;

  • (d) corrective actions in case of exceedances of the applicable maximum allowable SO2/CO2 ratio, or washwater discharge criteria;

  • (e) through range performance variation in washwater characteristics;

  • (f) design requirements of the washwater system.

  5.6.2 The ETM-B should be approved by the Administration.

  5.6.3 The ETM-B should be retained on board the ship onto which the EGC unit is fitted. The ETM-B should be available for surveys as required.

  5.6.4 Amendments to the ETM-B which reflect EGC unit changes that affect performance with respect to emissions to air and/or water should be approved by the Administration. Where additions, deletions or amendments to the ETM-B are separate to the ETM-B as initially approved, they should be retained with the ETM-B and should be considered as part of the ETM-B.


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