自升式钻井平台空舱透气管？

vikoliu

请问下各位，自升式钻井平台空舱透气管的尺寸如何确定?

ABS MODU移动平台入级规范ABS MODU 2008 移动平台入级规范中对于S E C T I O N 3 Tank Vents and Overflows这样写着:

Size
The diameter of each vent pipe is not to be less than 38 mm (1.5 in.) I.D. for fresh-water tanks, 51 mm
(2 in.) I.D. for water-ballast tanks and 63 mm (2.5 in.) I.D. for oil tanks, unless specially approved
otherwise. Where tanks are to be filled by pump pressure, the aggregate area of the vents in the tank is
to be at least 125% of the effective area of the filling line, except that when overflows are fitted, the
area of the overflow is to be at least 125% of the effective area of the filling line and the vents need
not exceed the above minimum sizes. Notwithstanding the above, the pump capacity and pressure
head are to be considered in the sizing of vents and overflows. When high capacity and/or high head
pumps are used, calculations demonstrating the adequacy of the vent and overflows are to be submitted.

但其中并没有提到空舱，那怎么确定VENT 的尺寸呢？

BRACKET

先声明我不是轮机的啊
您的问题
您提到的ABS的是针对液舱的啊
1.是否涉及危险区等级划分
2.换气次数是否有要求，是否采用机械通风
3.设计手册相关内容，有关于船上的其它处所的通风次数要求。可惜没平台设计手册！

另，modu code对合格通风的定义是每小时换气次数不少于12次，希望对您有所帮助！

laoshiren

这上面是说：所有的通气管的最小直径不得小于
淡水舱38mm 1.5'
压在水舱 51mm 2'
油舱 63mm 2.5'
对于需要用压力泵冲注的舱，通气管的直径为不小于冲注管直径的125%基本就这些。

vikoliu

回复 2# BRACKET


    谢谢您的回复！
不过我的问题不涉及机械通风，只是双层底下的一个空舱（VOID TANK)的透气问题！
仍谢谢你关注！

vikoliu

回复 3# laoshiren
    你说的对，没有提及空舱的透气管径如何确定！



CCS 里说是内径不小于75MM,但船却是入ABS级的，也只能先按75MM这个数值确定先！