液化气船驾驶窗气密要求

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从2016.1.1开始，液化气船驾驶室前窗要求气密为A0级，扫雪器也许满足A0级。A0级是什么意思，具体规范中的要求是什么，望大神指教。

cxd

查下SOLAS不就知道了

江海直达

具体是IGC的要求3.2 Accommodation, service and machinery spaces and control stations

  3.2.1 No accommodation space, service space or control station should be located within the cargo area. The bulkhead of accommodation spaces, service spaces or control stations which face the cargo area should be so located as to avoid the entry of gas from the hold space to such spaces through a single failure of a deck or bulkhead on a ship having a containment system requiring a secondary barrier.

3.2.2 In order to guard against the danger of hazardous vapours, due consideration should be given to the location of air intakes and openings into accommodation, service and machinery spaces and control stations in relation to cargo piping, cargo vent systems and machinery space exhausts from gas burning arrangements.

3.2.3 Access through doors, gastight or otherwise, should not be permitted from a gas-safe space to a gas-dangerous space, except for access to service spaces forward of the cargo area through air-locks as permitted by  when accommodation spaces are aft.

  3.2.4 Entrances, air inlets and openings to accommodation spaces, service spaces, machinery spaces and control stations should not face the cargo area. They should be located on the end bulkhead not facing the cargo area or on the outboard side of the superstructure or deck house or on both at a distance of at least 4% of the length (L) of the ship but not less than 3 m from the end of the superstructure or deck house facing the cargo area. This distance, however, need not exceed 5 m. Windows and sidescuttles facing the cargo area and on the sides of the superstructure of deck house within the distance mentioned above should be of the fixed (non-opening) type. Wheelhouse windows may be non-fixed and wheelhouse doors may be located within the above limits so long as they are so designed that a rapid and efficient gas and vapour tightening of the wheelhouse can be ensured. For ships dedicated to the carriage of cargoes which have neither flammable nor toxic hazards, the Administration may approve relaxations from the above requirements.

3.2.5 Sidescuttles in the shell below the uppermost continuous deck and in the first tier of the superstructure or deck house should be of the fixed (non-opening) type.

3.2.6 All air intakes and openings into the accommodation spaces, service spaces and control stations should be fitted with closing devices. For toxic gases they should be operated from inside the space.

3.2.5 面向货物区域和在3.2.4 中规定的限制内的上层建筑或甲板室两外侧壁上的窗和舷窗
（驾驶室窗除外）应建造成A-60 级。驾驶室窗应建造成不小于A-0 级（对于外部火载荷）。
最上层连续甲板以下外板上的舷窗以及在第1 层上层建筑或甲板室的舷窗均应为固定(非开
启)型的。

去找个有形式认可证书的A0窗就行了。以前驾驶室确实没有这个要求，只需要气密。