【正文】 ly, and flammable liquids with a flash point below 23176。mm mesh to prevent foreign objects from entering into the fan casing.9. With ventilation acc. to 8. and exproof electrical equipment of explosion group IIB, temperature class T4 and grade of protection IP 55, also the flammable gases (class ) with the exception of Hydrogen and mixtures thereof may be carried in the hold. It should be noted that all electrical equipment ing into contact with hold atmosphere has to meet this requirement (lighting, fire detection system, ventilators etc.). The carriage also of Hydrogen and mixtures thereof would require exproof installation of IIC T4. Lighting is not a requirement of the Rules nor SOLAS. Lighting or any other electrical equipment, unless required by the Regulations or in connection with the transport of ., may be isolated during the transport of goods requiring exproof electrical equipment.10. With ventilation according to 8., exproof installation according to 9. and an additional fixed bilge system for the removal of . spills, the classes , , and 8 may be carried without restrictions.11. In case of IMOclass 1, except , the following would have to be provided in addition to the basic requirements as per items 1. 10: – electrical equipment of at least IIB T5, IP 65 (only for goods liable to emit explosive dust or vapour) – water spraying system for the part where class 1 is to be stowed (5 litres/m2 ? min) – a machinery space bulkhead adjoining the cargo hold is to be insulated to A60 standard.12. In a cargo hold adjoining the machinery space various IMO classes have to be stowed 3m away from the machinery space bulkhead, unless it is insulated to A60 standard. For details please refer to the Rules. This requirement, however, is not applicable to container cargo holds. In case of IMO class 1 (except ) however, the A60 fire protection insulation is mandatory for the machinery space bulkhead adjoining a cargo hold. In addition, these goods have to be stowed 3 m away from the machinery space bulkhead.13. Note: IMOclass never is permitted to be carried in a hold regardless of any equipment fitted. This subclass is allowed on deck only.14. Carriage of containers on Nonweathertight Hatch covers With regard to the carriage of containers on nonweathertight hatch covers, potential hazards have been identified in case of dangerous goods of which leaked liquids may enter into the container cargo hold and for dangerous goods for which the IMDG code requires “on deck stowage” only.For newbuildings intended for the carriage containers on nonweathertight hatch covers with gaps, followings shall be observed:a. IACS LL 64From the carriage of dangerous goods point of view, he main items are: the gaps shall not exceed 50 mm to minimise the entry of leaked liquids into the container cargo hold, effective provisions (. gutter bars) shall be provided in way of the gaps the requirement CO2 quantity for the cargo hold is to be increased by at least 10 %b. In accordance with interpretation, para 9 of LL64 need not to be observed under following conditions:1. Stowage of containers on the hatch covers inside the gutter bars, . without bridging the gaps: no further requirement2. Stowage of containers above gaps, . by bridging the gaps:Additional drainage recess, . recessed labyrinth arrangement, shall be provided between the hatch covers.c. Mechanical ventilation in the cargo holds shall be provided. The kind of ventilation (exhaust or overpressure ventilation) should be selected as follows:1. For container cargo holds fitted with certified safe electrical equipment of at least IIBT4 IP55 and ventilation giving at least 2 air changes per hour, GL remends mechanical ventilation of exhaust type which we deem more effective in case of leakage of dangerous goods from containers stowed within the hold. Should any gases or vapour from the “on deck only” cargo be drawn into the hold it will be diluted sufficiently so that together with the forementioned standard of electrical protection there should be no risk of ignition.2. Overpressure ventilation of the cargo holds beneath should be required only if the cargo holds are not equipped for the carriage of flammable gases and liquids with flash point below 23 176。176。176。C and belowClass Flammable liquids with flash point above 23176。C up to 61176。C9except substances for which the IMDG code stipulates stowage in a mechanically ventilated spaceProvided additional dry powder fire extinguishers of total 12 kg are available dedicated to the use in the cargo deck area all classes of . may be carried on weather deck.8. For the carriage of flammable gases (class ), toxic gases (class ), substances of IMO class , liquids of class 6 and 8 with flash point 163。C, but above 23C (that means . no certified safe electrical equipment). An air change rate of at least 2/hr shall be provided and continuous ventilation should be maintained throughout the holds if such cargoes are stowed on the hatches.For details regarding the individual requirements please refer to the Rules.B. Transport of Solid Dangerous Goods in BulkIn case a vessel shall also be suitable for the carriage of solid . in bulk the following is to be applied:1. If fitted with equipment as per items 1., 2., 3., 5. and 6., the following classes can be carried in bulk: Separation to engine room bulkhead in accordance with BC code., , 8 and 9 12. Mechanical ventilation is mandatory only for a limited number of bulk cargoes. For details please refer to the Rules.3. A fire detection system as per item 4. is not required in case of solid . in bulk. 4. The CO2 system may be exempted on application in case of bulk cargoes which are nonbustible or of low fire risk or for which CO2 is deemed to be ineffective (IMO MSC/).5. Class In a cargo hold adjoining a machinery space stowage at least 3C in packaged form, flammable g