Piping System Macinery
Spaces of
Category A		 Pump
Room		 Bulkhead
and void		 Ballast
System		 Other
Dry
Cargo		 Cargo
Hold		 Fuel
Compart
ment		 Accomodation
Service		 Pipe
Tunnel &
Ducts		 Weather
Deck
Sea Water OK   OK OK         OK OK
Ballast     OK OK OK OK OK   OK  
Measurement/Air OK OK OK OK OK OK OK   OK OK
Fuel Oil     OK OK     OK   OK  
Potable Cooling Water     OK OK     OK   OK  
Sanitary Drains     OK OK OK   OK OK OK OK
Sanitary(Internal) OK   OK OK OK   OK OK OK OK
Bilge Line     OK OK     OK   OK  
Vent Line     OK OK   OK     OK  
60¡É Flammble
Cargo Lines		     OK     OK     OK  
Sewage, Underwater Piping in compartment     OK     OK     OK  
Non-essential systems OK OK OK OK OK OK OK OK OK OK


Grating thickness(mm) 13~38
Square size(mm) 38¡¿38~25¡¿152
Wall thickness
(up/below mm)		 5.8 / 5.0~12.2 / 9.0
Maximum size(mm) 565¡¿3050~1220¡¿3660
Stress direction biaxial stress / lengthwise / across width
Drilling ratio 30%~82%
Weight(kg/m2) 5.8~50.4