zanbinbin 发表于 2013-9-5 08:31
IGS不是强制的吧, 跟载重吨有关系的,DWT在20000以上的才需要,我觉breaker跟是否有IGS没关系,只是作为 ...
PV Breaker并不是强制的,强制要求的是“secondary means of venting”另一种透气方式。
一般装有IGS的船都通过设置PV breaker来满足要求而已。
而IGS如你所说20000DWT以下无需设置。这种情况下,没地方可以安装PV Breaker. 就可以通过设置另一个PV Valve来满足要求。
另外也可以通过设置一个pressure sensor来满足要求。这个解释是IACS unified interpretation SC140 给出的如下。
5. For ships that apply pressure sensors in each tank as an alternative secondary means of venting as per SOLAS Reg. II-2/11.6.3.2, the setting of the over-pressure alarm shall be above the pressure setting of the P/V-valve and the setting of the under-pressure alarm shall be below the vacuum setting of the P/V-valve. The alarm settings are to be within the design pressures of the cargo tanks. The settings are to be fixed and not arranged for blocking or adjustment in operation*. |