Section 8 Mechanical equipment and components
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Ships, July 2022 - Part 5 Main and Auxiliary Machinery - Chapter 25 Ballast Water Treatment System and Installation - Section 8 Mechanical equipment and components

Section 8 Mechanical equipment and components

Parent topic: Chapter 25 Ballast Water Treatment System and Installation

8.1 General

8.1.1 Air, sounding and overflow arrangement associated with BWTS are to comply with the requirement of Pt 5, Ch 13, 11 Ballast system and Pt 5, Ch 13, 12 Air, overflow and sounding pipes respectively.

8.1.2 Modification to ballast tank, air and overflow system, air pipe closing appliances and other systems and equipment is subject to special approval, see Pt 5, Ch 25, 10 Ballast water treatment room location and boundaries.

8.1.3 Chemical injection lines, concentrated treatment injection lines, inert gas injection lines and sampling point are to be of a rigid construction and be properly supported.

8.1.4 Risk of leakage from degassing equipment is to be prevented. Vent arrangements are to be directed to an area on open deck with no ignition hazard.

8.1.5 Degassing equipment shall be made of a suitable material. Non-metallic materials may be allowed for components inside degassing equipment subjected to special consideration.

8.1.6 Degassing equipment shall be arranged to ensure any hydrogen present is at a concentration less than the 4 per cent Lower Explosive Limit (LEL) before venting. Failure of such arrangement is to activate BWTS shutdown.

8.2 Filtering units

8.2.1 Filters to be sized to the maximum flow rate of the ballast system.

8.2.2 Filters arranged in line with the ballast system are to be provided with redundancy.

8.2.3 Filter casings are to satisfy the requirements of Pt 5, Ch 11 Other Pressure Vessels, as applicable, see also Pt 5, Ch 25, 5.1 General 5.1.1.

8.2.4 Where filters are provided with a by-pass arrangement as per Pt 5, Ch 25, 11.1 General requirements 11.1.3, above requirements Pt 5, Ch 25, 8.2 Filtering units 8.2.2 and Pt 5, Ch 25, 8.2 Filtering units 8.2.3 may be exempted.

8.3 Other components

8.3.1 Ozone generators, electro chlorination units, electrolysis units, air compressors, oxygen generators, electrodialytic units, ultraviolet units, ultrasonic units, coagulation units, other treatment units and ancillaries are to be constructed to recognised industrial, National or International Standards acceptable to LR. These components are to be tested to 1.5x their working pressure during manufacture of the BWMS.

8.3.2 Pressurised components such as heat exchangers, air and fluid storage bottles are to satisfy the requirements of Pt 5, Ch 11 Other Pressure Vessels as appropriate.

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