1.8 Bilge and ballast A fire and bilge pump has suctions from sea, bilge main and engine room bilge, with discharges to fire main, oily water separator and overboard. a ballast pump has suctions from sea, ballast main, engine room bilge direct and bilge main with discharges to overboard, the ballast main the oily water separator and possibly, the main salt water circulating system
1.8 Bilge and ballast • A fire and bilge pump has suctions from sea, bilge main and engine room bilge, with discharges to fire main, oily water separator and overboard. A ballast pump has suctions from sea, ballast main, engine room , bilge direct and bilge main with discharges to overboard, the ballast main, the oily water separator and possibly, the main salt water circulating system
1.8 Bilge and ballast a general service pump has suctions from sea ballast main, bilge main and engine room bilge with discharges to the fire main, the ballast main the oily water separator and overboard. In this way, three pumps provide effective alternatives for all essential services in the event of breakdown of one or even two. Many ships will have more generous provision and all passenger ships will have a submersible fire and bilge pump, supplied with power from an emergency dynamo
1.8 Bilge and ballast • A general service pump has suctions from sea, ballast main, bilge main and engine room bilge with discharges to the fire main, the ballast main, the oily water separator and overboard. In this way, three pumps provide effective alternatives for all essential services in the event of breakdown of one or even two. Many ships will have more generous provision and all passenger ships will have a submersible fire and bilge pump, supplied with power from an emergency dynamo
1.8 Bilge and ballast There are many differences in arrangement; some ships will be fitted for oil or ballast in all double bottom tanks(except one or two, port and starboard for fresh water)some in only two or three Other vessels will have one(or more) lower holds fitted as deep tanks and most will have peak ballast tanks forward and aft. Some ships will have a tunnel from the engine room to No. 1 hold aft bulkhead for bilge, ballast and oil pipes and fittings and others will have a duct keel to carry the pipes forward
1.8 Bilge and ballast • There are many differences in arrangement; some ships will be fitted for oil or ballast in all double bottom tanks (except one or two, port and starboard for fresh water) some in only two or three. Other vessels will have one (or more) lower holds fitted as deep tanks and most will have peak ballast tanks forward and aft. Some ships will have a tunnel from the engine room to No.1 hold aft bulkhead, for bilge, ballast and oil pipes and fittings and others will have a duct keel to carry the pipes forward
1.8 Bilge and ballast In most other ships the bilge suction pipes will pass through the wings of the holds and the ballast pipes e through the double bottom In the two latter cases the valve chests will be on the engine room(or boiler room) forward bulkhead or in a forward cofferdam. In all cases a the bilge suction valves will be screw-down, non-return, the oil and ballast valves, screw-lift. Ring and blank flanges will be fitted in deep tank suctions, so that ballast e cannot be discharged inadvertently by a bilge pump not the hold be flooded when used for cargo. If liquid cargoes are carried both will be blanked. note that double bottom tanks should never be pumped up
1.8 Bilge and ballast • In most other ships the bilge suction pipes will pass through the wings of the holds and the ballast pipes through the double bottom. In the two latter cases, the valve chests will be on the engine room (or boiler room) forward bulkhead or in a forward cofferdam. In all cases, the bilge suction valves will be screw-down, non-return, the oil and ballast valves, screw-lift. Ring and blank flanges will be fitted in deep tank suctions, so that ballast cannot be discharged inadvertently by a bilge pump not the hold be flooded when used for cargo. If liquid cargoes are carried, both will be blanked. Note that double bottom tanks should never be pumped up
4 DC C20 B工Tc& BALLAST SYSTEM 05.03.02 13:27:00 AFT PEAKBw20 翻翻翻翻 WB TK BW34 02,0 363.2M3 298.7 Bw14 BW12 文文e|w| ow Bw ew ew 27262524222 OREPEAK BWc FROM BILGECROSS 0.0 BALLAST/ BAR 0,00M B418 X BW15 XBW13 区B X BWO7 BW05 XBW03 ALL XXX EJEC BWBWBW 4 SB M DRAFT PORT 0.00 M AFT 0.00. M FORE 0 TRIM 0.00 STBD 0.00 M 5T0,00 OCP DISPLAY ALARM/SOUND OFF AL粪R网 TAG DETAILS ECR WATCH GROUP ACKNOWLEDGE