Section 12 Additional requirements for ships carrying dangerous goods

12.1.1 This Section applies to ships which are to be built in accordance with the additional requirements set out in Chapter 9, Section 9.1.0.80 of the ADN. Ships complying with the requirements of this Section will be eligible to receive the additional Class Notation in accordance with Pt 4, Ch 1, 1.3 Class notation 1.3.5.

12.1.2 The ADN are the regulations for the transport of dangerous goods on European waterways. The abbreviation ADN stands for:

12.1.3 The exemptions and derogations to the ADN , as authorised by the UNECE (United Nations Economic Commission for Europe) - Experts on ADN, may also be taken into consideration.

12.1.4 The structural and other arrangements of dry cargo ships for the carriage of dangerous goods in bulk, to be registered in, or to operate in countries with Regulations differing from ADN will receive appropriate special consideration if required by the relevant Authorities and/or desired by the Owner.

12.1.5 Although the contents of this Section take the ADN Regulations into account, the issue of an ADN Certificate on behalf of the Relevant Authorities requires full compliance with their Regulations.

12.1.6 For ease of reference, the relevant Parts of which the ADN consists are given hereunder:

12.1.7 For further details and information, reference is made to the above Parts of the ADN. For use together with this Chapter, special attention is drawn to the contents of Parts 2, 3, 7 and 9 of the ADN.

12.2.1 The following categories of dangerous goods are identified in Part 2 of the ADN:

12.2.2 Table A as listed in Part 3 of the ADN contains the list of dangerous goods in numerical order (UN number or identification number). This Table also contains data concerning the permitted form of carriage in Inland Waterways vessels.

12.3.1 Part 7 of the ADN contains requirements concerning the maximum quantities of dangerous goods of Classes 2, 3, 4.1, 4.2, 4.3, 5.1, 5.2, 6.1, 7, 8 and 9 which may be carried on one ship.

12.3.2 Ships intended to carry dangerous goods of Classes 2, 3, 4.1, 5.2, 6.1, 7, 8 or 9 – except those for which label No. 1 is prescribed in column (5) of Table A of Pt 4, Ch 3, 2 Longitudinal strength – in quantities exceeding those referred to in paragraph 7.1.4.1.1 of the ADN, shall also comply with the requirements of Pt 4, Ch 1, 12.4 Structural requirements, Pt 4, Ch 1, 12.5 Arrangements, Pt 4, Ch 1, 12.6 Ventilation and Pt 4, Ch 1, 12.7 Stability .

12.4.1 The ship shall be built as a double-hull vessel with double hull spaces and a double bottom within the protected area.

12.4.2 The distance between the side shell and the cargo hold bulkheads shall not be less than 0,80 m.

12.4.3 The depth of the double bottom shall be not less than 0,50 m. The depth below a suction well may however be locally reduced to 0,40 m. When the distance of the bottom of the suction well is between 0,40 and 0,49 m from the baseline the horizontal cross-sectional area of the well shall not exceed 0,50 m². In all cases the volume of the well shall not exceed 0,12 m³.

12.4.4 Regardless of statutory requirements relating to the width of walkways on deck, a reduction of the distance as per Pt 4, Ch 1, 12.4 Structural requirements 12.4.2 to 0,60 m is permitted, provided that the following reinforcements will be provided:

1. Where the vessel's sides are constructed according to the longitudinal framing system, the frame spacing shall not exceed 0,60 m. The longitudinals shall be supported by plate webs in line with the floors in the double bottom. Plate webs are to be provided with openings to enable proper inspection of the space. The webs are to be spaced not more than 1,80 m apart. This distance may be increased when the structure is strengthened accordingly;

2. Where the vessel's sides are constructed according to the transverse framing system, either:

   • two longitudinal side shell stringers shall be fitted. The distance between the two stringers and between the uppermost stringer and the deck at side shall not exceed 0,80 m. The depth of the stringers shall be at least equal to that of the transverse frames and the cross-section of the face plate shall be not less than 15 cm². The longitudinal stringers shall be supported by open plate webs in line with the plate floors in the double bottom and spaced not more than 3,60 m apart. The transverse side shell frames shall be connected at the bilge by a bracket having a depth not less than 0,90 m and a thickness equal to the thickness of the floors;

   or:

   • open plate webs in line with the double bottom floors shall be arranged at each transverse frame;

3. The upper deck shall be supported by transverse bulkheads or cross-ties spaced not more than 32 m apart. This requirement may be waived provided it is proven that the (additional) structure in the double hull is such that adequate transverse strength is achieved.

12.5.1 The bottom of the holds shall be such as to permit them to be cleaned and dried.

12.5.2 Cargo holds shall have no common bulkheads with fuel oil tanks.

12.5.3 The air pipes of all fuel oil tanks shall be led to 0,50 m above the open deck.

12.5.4 Means are to be provided to prevent the formation of sparks in the protected area.

12.5.5 Entrances to and openings of engine rooms and service spaces shall not face the cargo area.

12.5.6 Openings of the accommodation and wheel-house facing the cargo holds are to be provided with gastight closing appliances.

12.5.7 Exhausts shall be led into the open air either upwards through an exhaust pipe or through the shell plating. The exhaust outlet shall be located not less than 2,0 m from the cargo hold openings. The exhaust pipes of engines shall be arranged in such a way that the exhausts are led away from the vessel. The exhaust pipes shall not be located within the protected area.

12.6.1 Ventilation shall be provided for the accommodation and for service spaces.

12.6.2 Ventilation ducts for venting the hold(s) shall be positioned at the extreme ends of the hold(s) and extend down to not more than 50 mm above the bottom. The extraction of gases and vapours through the duct shall also be ensured in case of carriage of bulk cargoes.

12.6.3 If the ventilation ducts are removable they shall be suitable for the ventilator assembly and capable of being firmly fixed. Protection shall be ensured against bad weather and spray. An unobstructed intake of air shall be ensured during ventilation.

12.7.1 Attention is drawn to the ADN damage stability requirements. Verification of compliance with these regulations is usually dealt with by the National Authorities, but upon request, verification by the Society followed by issuing a statement of compliance can also be arranged.