Section 1 General

1.1.1 The requirements of this Chapter apply to machinery and equipment fitted to combustion machinery in order to reduce emissions produced by the combustion of fuel. Such machinery and equipment is hereinafter referred to as emissions abatement plant.

The requirements are intended to ensure that the emissions abatement plant is safe to operate and maintain and, additionally, where the combustion machinery provides power for essential services, that failure of the emissions abatement plant does not result in an unacceptable loss or degradation of those essential services.

The requirements are applicable to emissions abatement plant making use of both primary techniques, which reduce emissions by controlling the combustion process or removing pollutants prior to combustion, e.g. Exhaust Gas Recirculation (EGR), and to secondary emissions abatement techniques which reduce emissions from the exhaust gas after combustion, e.g. scrubbers and Selective Catalytic Reduction (SCR). Emissions abatement plant making use of primary techniques is also to satisfy the applicable requirements of Pt 5, Ch 2 Reciprocating Internal Combustion Engines (See Pt 5, Ch 2, 1.2 Scope 1.2.4).

It should be noted that these requirements do not provide for the reliability or redundancy necessary to ensure continued operation of the emissions abatement plant, and thereby compliance with relevant emissions requirements, following failure of any machinery, equipment or components associated with the emissions abatement plant.

The EGCS() notation indicates that the SO_x emissions abatement plant has been designed, constructed, arranged, installed and tested in accordance with LR’s Rules and Regulations. Application of the EGCS() notation does not infer that the installation meets applicable statutory emissions regulations. Where the installed SO_x emissions abatement plant is not intended to reduce the emissions produced by all fuel oil combustion machinery, excluding shipboard incinerators fitted on board that are required to comply with other statutory emissions regulations and machinery used for emergency purposes such as emergency generators, the notation ‘Partial’ is to be appended to the EGCS notation, e.g. EGCS(Open, Partial).

1.2.2 Ships complying with relevant SO_x emissions abatement plant requirements of this Chapter may be eligible for the Exhaust Gas Cleaning System Ready (EGCS-R()) descriptive note. This descriptive note may be assigned when aspects of design and construction are prepared for installation of SO_x emissions abatement plant for combustion machinery, e.g. scrubber. This is not an LR class notation and is provided solely for information.

EGCS-R() Assigned to ships with the extension of one or more of the following associated characters shown in brackets, detailing the aspects of design and construction that are in accordance with LR’s Rules and Regulations in force on the date of ‘contract for construction’:

A Preliminary assessment of the proposed SO_x emissions abatement plant including its arrangement on board has been completed satisfactorily;

S Enhanced structural reinforcement and structural modifications necessary for the function of the proposed SO_x emissions abatement plant have been fitted under survey. For open loop systems this includes any necessary enlargement of sea chests and fitting of additional sea water inlets for future use;

T The relevant tank(s) needed for operation of the proposed SO_x emissions abatement plant (e.g. chemical and/or residue storage tanks as applicable) have been installed under survey in accordance with approved design.

Where the proposed SO_x emissions abatement plant is not intended to reduce the emissions produced by all fuel oil combustion machinery, excluding shipboard incinerators fitted on board that are required to comply with other statutory emissions regulations and machinery used for emergency purposes such as emergency generators, the notation ‘Partial’ is to be appended to the EGCS descriptive note with applicable characters, e.g. EGCS-R(A, Partial), EGCS-R(A, Closed, Partial, T), as appropriate. Further appraisal against the LR requirements at the time of installation followed by testing under survey will be required when the emissions abatement plant is to be installed. Application of the EGCS-R() descriptive note does not infer that the proposed installation will meet the statutory requirements for emissions regulation.

1.2.5 Ships complying with particular NO_x emissions abatement plant requirements of this Chapter may be eligible for the Exhaust Gas Cleaning for NO_x Ready (EGCN-R()) descriptive note. This descriptive note may be assigned when aspects of design and construction are prepared for installation of NO_x emissions abatement plant for combustion machinery, e.g. SCR. This is not an LR class notation and is provided solely for information.

EGCN-R() Assigned to ships with the extension of one or more of the following associated characters shown in brackets, detailing the aspects of design and construction that are in accordance with LR’s Rules and Regulations in force on the date of ‘contract for construction’:

A Preliminary assessment of the proposed NO_x emissions abatement plant including its arrangement on board has been completed satisfactorily;

S Enhanced structural reinforcement and structural modifications necessary for the function of the proposed NO_x emissions abatement plant have been fitted under survey;

T The relevant tank(s) needed for operation of the proposed NO_x emissions abatement plant (e.g. chemical tanks) have been installed under survey in accordance with approved design.

1.2.6 The following are to be submitted to achieve EGCN-R() descriptive note with applicable associated characters:

1. EGCN-R(A) ‘Preliminary assessment’
   • Vessel general arrangement;
   • General arrangement of NO_x emissions abatement plant illustrating the locations of NO_x emissions abatement machinery and tanks with respect to machinery, control and service spaces;
   • Exhaust system arrangement (showing necessary modifications for installation of the proposed NO_x emissions abatement plant);
   • Arrangement and capacity of tanks for storage of chemicals;
   • Information on the operational requirements of the proposed NO_x emissions abatement plant with respect to additional chemical requirements as applicable;
   • Electrical system requirements including details of how the proposed system is to be incorporated into the vessel’s electrical system; and
   • Preliminary studies for vessel Load Line and stability taking the proposed NO_x emissions abatement plant installation into account.
2. EGCN-R(S) ‘Structural reinforcement fitted’
   • Full details of the structural reinforcement required to support the proposed NO_x emissions abatement plant are to be submitted. This should include details of the proposed plant type, size, location and loadings (dynamic and static) to allow verification of the submitted structural design and calculations for the plant support arrangements.
3. EGCN-R(T) ‘Tank installed’
   • Plans and information required for EGCN-R(S) descriptive note;
   • Structural plans for tanks to be installed, and any additional support arrangements where necessary for independent tanks, in accordance with Pt 3, Ch 1, 2 Direct calculations;
   • Full details of the materials proposed for construction of the tank(s);
   • Details of the flammability, toxicity, corrosivity and reactivity of any chemicals to be stored in the tanks. This is to include effluent associated with the NO_x emissions abatement plant;
   • Details of air and sounding pipes to tanks containing chemicals, substances and effluent; and
   • Details of arrangements for loading, storage, transfer and disposal of chemicals, by-products or waste products. This is to include allowable maximum and minimum storage temperatures for substances which are sensitive to temperature.

1.2.7 Where a primary NO_x emissions abatement plant is fitted to the ship’s engine(s), e.g. EGR, the ship will be eligible for the assignment of the EGCN() machinery notation with the following notation, subject to complying with the applicable requirements given in Pt 5, Ch 2 Reciprocating Internal Combustion Engines and this Chapter:

• (EGR) Exhaust Gas Recirculation installed.