BASIC FOAM FIREFIGHTING OPERATIONS Red and Green Systems

Transcription

1 BASIC FOAM FIREFIGHTING OPERATIONS Red and Green Systems Page Each of the Red and Green Foam Systems consists of one 3000 gallon foam concentrate storage tank, two foam concentrate pumps, a balanced pressure foam proportioner, related valves, plumbing, and remote Pilothouse controls. FOAM TANKS PORT and STARBOARD F P 4 F P 2 FOAM PUMPS PORT and STARBOARD F P 1 F P 3 Figure Each of the Red and Green Foam Systems has a 15 kw (20 Hp), 60 GPM foam pump (Pumps 3 and 4) that serves as the primary pump. The primary foam pumps are supported by 45 kw (60 Hp), 165 GPM secondary foam pumps (Pumps 1 and 2). The foam pumps maintain a working foam system pressure of 232 psi/16 bar. (Fig ) RELIEF VALVE and BYPASS ASSEMBLIES Red System Foam Pumps (port side) PUMP 2 (SECONDARY) 165 GPM 45 kw Figure PUMP 4 (PRIMARY) 60 GPM 15 kw

2 Page Foam can be introduced into the fire stream at any time during a pumping evolution when the manual foam supply valves below deck are opened prior to starting the foam pumps. Each system has four (4) manually operated foam supply valves. Three (3) of these valves are located on each side of the foam room (Aft Hold) and supply the inlet side of the appropriate Red or Green System foam pumps (Fig ). The fourth foam supply valve in each system is located in each of the main foam supply lines in the Engine Room (Fig ); these valves pass foam concentrate from the discharge side of the Red or Green System foam pumps to the Red or Green System Balanced Pressure Proportioners (Fig ). The four foam supply valves for each system require an operator to manually open or close each valve. Foam pumps are remotely operated from the Engineer Consoles in the Pilothouse. The Balanced Pressure Foam Proportioners (Fig ) have an operating range of 1% to 6%. All three foam proportioners on Fireboat 2 are pre-set to 3%, including the White System proportioner in the Aft Hold (Fig ). The foam system is most efficient and proportions most accurately when the firefighting system is at its design pressure of 160 psi. NOTE The pressure to the foam proportioner must exceed the firemain pressure by a minimum of one bar (14.5 psi). The foam pumps supply concentrate at 16 bar/232 psi to the foam proportioners.

3 Page Balanced Pressure Foam Proportioner, Green System PROPORTIONER FOAM CONCENTRATE FOAM SOLUTION BALANCE LINE Figure ROTATE TO ADJUST FOAM CONCENTRATE ORIFICE Figure INDICATES FOAM PERCENTAGE Foam concentrate or foam solution can also be delivered to other firefighting apparatus or shore side systems utilizing the foam pumps along with established foam transfer procedures.

4 FOAM SYSTEM OPERATION Page Red or Green System 1. Open three or four manual foam supply valves on the port (Red) or starboard (Green) foam system below deck (Fig , -58), depending upon which foam pump is to be used, or if both are needed. AFT HOLD, STBD (GREEN SYSTEM) FF-1S FOAM FLUSH STARBOARD FOAM TANK SUPPLY to 60 GPM PUMP #3 FP-3A #3 FOAM SUCT 3000 GALLON CAPACITY MAIN FOAM TANK VALVE FTS 1 S FOAM SUCT SUPPLY to 165 GPM PUMP #1 FP-1A #1 FOAM SUCT Figure ENGINE ROOM, STARBOARD (GREEN SYSTEM) FOAM DELIVERY VALVE (MANUAL) FI-1 S FOAM ISO to GREEN SYSTEM PROPORTIONER Figure

5 Page Bring the firefighting system to design pressure (160 psi. Fig , -60) PUMP ENGINE CONTROLS (AFT CONTROL PANEL) Set Point Pump Engine RPM IDLE 500 SP SP SP SP SP Figure or WHEN HELD DOWN, THESE BUTTONS GRADUALLY INCREASE or DECREASE PUMP ENGINE RPM FIRE MAIN PRESSURE GAUGES (AFT CONTROL PANEL) Figure

6 Page Open the discharge valves of the required foam pumps (Fig ) from the Engineer Consoles in the Pilot House (Fig ). ELECTRIC ACTUATOR and FOAM PUMP #3 DISCHARGE VALVE FP-3B FOAM #3 DISCH FOAM PUMP #3 Figure AFT CONTROL PANEL FOAM PUMP 3 ON/OFF FOAM PUMP 3 DISCHARGE VALVE FP-3 B #3 FOAM DISCH ON/OFF Figure

7 4. Start the foam pump(s). Page See Control Panel display (Fig ) 5. Monitor foam application time to estimate foam consumption, application rate, remaining application time, etc. Figure Monitor foam level at the storage tank during application. SIGHT GAUGE STARBOARD FOAM TANK Figure

8 Page Monitor the alarm system for low storage tank level alarm; alarm will display when foam concentrate level is at 25% remaining and at 5% remaining. TWO LINE DISPLAY, PILOT HOUSE (STARBOARD SIDE) Figure Shut Down: End of Operation 1. Shut down foam pumps at Control Panel forward or aft. 2. Follow firefighting system shut down procedures (Refer to End of Operation Shutdown in Basic Pumping Operations). 3. Shut down foam pump discharge valves at Control Panel forward or aft. 4. Close the manual foam supply valves (4 each, port and starboard) below deck. 5. Check foam tank levels at sight gauges and fill as needed. 6. Back flush system through hydrant connections (See below, Flushing the Foam System with Fresh Water )

9 White System Page The White System uses a dedicated balanced pressure foam proportioner which is properly sized for the four (4) 2 ½ outlets found on the aft hydrant manifolds. One 60 GPM foam pump will be used to supply the White System, and will provide adequate concentrate for all four 2 ½ outlets simultaneously. The White System will normally be used for hand line operations. Water is supplied to the White System by the Blue System pumps, either from Pump #6, with the Crossover/ Isolation Valve closed, or from the Blue System manifold with the Isolation/Crossover Valve open (Fig ). Foam concentrate can be supplied to the White System by either the port or starboard foam pumps (Pump 4 or 3). White System Foam Operation 1. Open two manual foam supply valves on the port or starboard side in the Aft Hold. 2. Bring the firefighting system to the desired pressure (160 psi) 3. Open the discharge valve(s) for the required foam pump. 4. Open two valves to the Balanced Pressure Proportioner for the White System: for example; manual foam export valve FE-2P FOAM EX at the port aft bulkhead in the Engine Room, and valve 7 FOAM AFT HYD, located overhead in the Aft Hold and controlled remotely from the Engineer s Consoles in the Pilot House. AFT CONTROL PANEL BALANCED PRESSURE PROPORTIONER, WHITE SYSTEM FOAM PROPORTIONER SUPPLY VALVE 7 FOAM AFT HYD (PORT SIDE) MANUAL FOAM EXPORT VALVE FE-2P FOAM EX (PORT SIDE) Figure

10 ENGINE ROOM, PORT SIDE AFT BULKHEAD Page MANUAL FOAM EXPORT VALVE FE-2P FOAM EX E VALVE FP-4B FOAM #4 DISCH FOAM PUMP #4 60 GPM Figure Start the foam pump. 6. Monitor foam pump run time to determine foam consumption, rate of application, and remaining application time. 7. Monitor foam level at the storage tank. 8. Monitor foam storage tank alarm system low storage tank level alarm will display at 25% and 5% concentrate remaining. 9. Monitor and avoid dead heading the foam pump(s).

11 Page FLUSHING THE FOAM SYSTEMS WITH FRESH WATER NOTE FLUSH ONE FOAM SYSTEM (White, Red, or Green) and ONE FOAM PUMP at a time. NOTE Leaving the four foam pump supply valves closed during flushing will allow the flushing water to bypass the foam pumps. The remaining components of the foam system (foam proportioners, piping, manifolds, etc.) can then be flushed without involving the foam pumps. White System Fresh Water Flush Manual Foam Valves, Aft Hold, Port Side FOAM FLUSH VALVE FF-2P FOAM FLUSH FOAM PUMP #4 INLET VALVE FP-4A #4 FOAM SUCT FOAM PUMP #2 INLET VALVE FP-2A #2 FOAM SUCT PORT FOAM TANK VALVE FTS 2 P FOAM SUCT Figure

12 Page ) Verify that manual foam tank valve FTS 2 P FOAM SUCT in Aft Hold (Fig ) is closed. 2) Connect a 1 ½ fresh water supply hose to foam export valve FE-3 FOAM EXPORT inside pedestal (Fig ). MANUAL FOAM EXPORT VALVE FE-3 FOAM EXPORT Figure ) Open manual flush valve FF-2P FOAM FLUSH in Aft Hold (Fig ). 4) Open manual foam pump inlet valve FP-2A #2 FOAM SUCT or FP-4 #4 FOAM SUCT in Aft Hold (Fig ). 5) Open E valve FP-2B FOAM #2 DISCH or FP-4B FOAM #4 DISCH (Fig , -77). NOTE E valves (ELECTRIC, REMOTE CONTROLLED) are normally operated from the Control Panels in the Pilot House through the use of remotely controlled electric valve actuators. When the valves are de-energized, the valves can be operated manually by pulling out and turning the gray wheel mounted on each valve.

13 AFT CONTROL PANEL SHOWING RED SYSTEM E VALVES Page FOAM PUMP #4 E VALVE FP-4B FOAM #4 DISCH E VALVES FOAM PUMP #2 E VALVE FP-2B FOAM #2 DISCH Figure ) Open White System E valve ( 7 FOAM AFT HYD ) in Aft Hold (Fig ). AFT HOLD, PORT SIDE BALANCED PRESSURE PROPORTIONER (WHITE SYSTEM) E VALVE 7 FOAM AFT HYD PRESSURE RELIEF VALVE to PORT SIDE FOAM TANK NORMALLY SUPPLIES FOAM CONCENTRATE TO WHITE SYSTEM BALANCED PRESSURE PROPORTIONER FROM FOAM PUMP 4 (or 3) CHECK VALVE E VALVE 6 C #6 UNL WHITE SYSTEM OVERBOARD DISCHARGE Figure

14 Page AFT CONTROL PANEL 7 FOAM AFT HYD 6 C #6 UNL Figure ) Open both eductor valves on Aft Deck (Fig ) PORT QUARTER EDUCTOR VALVE PORT SIDE EDUCTOR Figure

15 Page ) Keep Crossover/Isolation Valve CLOSED and E Valve 6A #6 DISCH OPEN (Fig , -75). ENGINE ROOM, PORT SIDE AFT CROSSOVER/ISOLATION VALVE 4C #6 ISOL E VALVE 6A #6 DISCH Figure AFT CONTROL PANEL Figure

16 Page ) Provide fresh water supply and open manual valve FE 3 FOAM EXPORT located under pedestal (Fig ). PEDESTAL FE 3 FOAM EXPORT Figure AFT CONTROL PANEL FOAM DISCHARGE E VALVE FP-4B FOAM #4 DISCH FOAM DISCHARGE E VALVE FP-2B FOAM #2 DISCH Figure

17 10) Alternate opening and closing port and starboard eductor overboards and port and starboard hydrants until foam is completely flushed from foam pump and system. 11) Turn off and disconnect fresh water supply. Page ) Return all valves to normal positions.

18 Page Red System Fresh Water Flush 1) Verify that manual Foam Tank Valve FTS 2 P FOAM SUCT is closed (Fig ). 2) Connect a 1 ½ fresh water supply hose to FOAM EXPORT valve FE-3 inside pedestal (Fig ). 3) Open manual flush valve FF-2P FOAM FLUSH (Fig ). 4) Open port side foam pump inlet valve FP-2A #2 FOAM SUCT or FP-4A #4 FOAM SUCT (Fig ). 5) Open foam pump discharge E valve FP-2B FOAM #2 DISCH or FP-4B FOAM #4 DISCH (Fig ). 6) Open manual foam valve FI-2 P FOAM ISO (Fig ) in Engine Room. MANUAL FOAM VALVE FI-2 P FOAM ISO Figure

19 Page ) Open overboard E valve 2C #2 UNL located above Pump #2 (Fig , -80). OVERBOARD E VALVE RED SYSTEM 2C #2 UNL Figure AFT CONTROL PANEL Figure

20 Page ) Provide fresh water supply to manual valve FE 3 FOAM EXPORT (Fig ). 9) Open manual valve FE 3 FOAM EXPORT located under pedestal (Fig ). 10) Alternate opening port side Pilot House Monitor, Forward Boat Deck Monitor, Forward Manifold, and the overboard discharge until foam is completely flushed from the Red System. 11) Turn off manual valve FE 3 FOAM EXPORT under pedestal (Fig ). 12) Turn off and disconnect fresh water supply. 13) Return all valves to normal positions.

21 Green System Fresh Water Flush Page ) Verify that manual Foam Tank Valve FTS 1 S FOAM SUCT is closed (Fig ). 2) Connect a 1 ½ fresh water supply hose to FOAM EXPORT valve FE-3 FOAM EXPORT inside pedestal (Fig ). 3) Open manual flush valve FF-1 S FOAM FLUSH (Fig ). 4) Open starboard side manual foam pump inlet valve FP-1A #1 FOAM SUCT or FP-3A #3 FOAM SUCT (Fig ). 5) Open foam pump discharge E valve FP-1B FOAM #1 DISCH or FP-3B FOAM #3 DISCH (Fig ). Aft Control Panel, Green System FOAM PUMP #3 E VALVE FP-3B FOAM #3 DISCH Figure FOAM PUMP #1 E VALVE FP-1B FOAM #1 DISCH 6) Open manual foam valve FI-1 S FOAM ISO in Engine Room (Fig ).

22 Page ) Open overboard E valve 1C #1 UNL located above Pump #1 (Fig , -83). OVERBOARD E VALVE GREEN SYSTEM 1C #1 UNL Figure Aft Control Panel, Green System Figure ) Provide fresh water supply to valve FE3 FOAM EXPORT (Fig ).

23 Page ) Open manual valve FE3 FOAM EXPORT located under pedestal (Fig ). 10) Alternate opening starboard side Pilot House Monitor, Forward Boat Deck Monitor, Forward Manifold, and the overboard discharge until foam is completely flushed from the Green System. 11) Turn off manual valve FE3 FOAM EXPORT FE 3 under pedestal. 12) Turn off and disconnect fresh water supply. 13) Return all valves to normal positions.

24 FILLING the FOAM TANKS Page ) Close both Main Foam Tank shutoffs in Aft Hold ( FTS-1 S FOAM SUCT and FTS-2 P FOAM SUCT (Fig , -68). 2) Bring foam fill pipe extension from storage location in Aft Hold (Fig ). STARBOARD FOAM TANK PROVIDE SOCKET TO REMOVE ONE 9/16 NUT and WASHER FOAM FILL PIPE EXTENSION Figure ) Remove blank from foam fill flange in pedestal (Fig ). FE 3 FOAM EXPORT (MANUAL VALVE) FOAM TANK VENT FOAM TANK FILL BLANK HELD WITH 15/16 BOLTS Figure

25 Page ) Attach foam fill pipe extension to FOAM TANK FILL flange (four 15/16 bolts) (Fig ). BLUE BLANK MUST BE REMOVED 4 NST THREADS Figure ) Begin filling. Filling progress will be indicated on sight gauges in Aft Hold (Fig , -68). Sight gauges are integral with foam tank vents. NOTE The foam fill piping divides to provide concentrate to both foam tanks. If either tank fills first, the remaining incoming concentrate will flow into the second tank. Filling progress must be monitored on the sight gauges connected to the foam tanks to prevent spillage once both tanks have reached full capacity.

26 EXPORTING FOAM CONCENTRATE Page Exporting Foam Concentrate from Port Foam Tank 1) Open Main Tank valve FTS-2 P FOAM SUCT (Fig ). 2) Verify that foam flush valve FF- 2 P FOAM FLUSH is closed (Fig ). Aft Hold, Port Side FF- 2 P FOAM FLUSH Figure ) Open Foam Pump #4 inlet valve FP-4A #4 FOAM SUCT (Fig ). 4) Open Foam Pump #4 discharge E valve FP-4B FOAM #4 DISCH (Fig , -77). 5) Open manual foam export valve FE-2P FOAM EX in Engine Room (Fig ). 6) Connect 1 ½ line to foam export valve FE-3 FOAM EXPORT inside pedestal (Fig ). 7) Open manual foam export valve FE-3 FOAM EXPORT (Fig ).

27 8) Start 60 GPM Foam Pump #4 (port side). Page ) When transfer is complete, stop foam pump and return valves to normal positions. 10) Disconnect hose and fittings. 11) Flush fittings. 12) Flush system.

28 Exporting Foam Concentrate from Starboard Foam Tank Page ) Open main foam tank valve FTS-1 S FOAM SUCT (Fig ). 2) Verify that foam flush valve FF-1 S FOAM FLUSH (Fig ) Aft Hold, Starboard Side FF-1 S FOAM FLUSH Figure ) Open Foam Pump #3 inlet valve FP-3A #3 FOAM SUCT (Fig ). 4) Open Foam Pump #3 discharge E valve FP-3B #3 FOAM DISCH (Fig , -62).

29 Page ) Open manual foam export valve FE-1 S FOAM EX in Engine Room (Fig ). MANUAL FOAM EXPORT VALVE FE-1S FOAM EX Figure ) Connect 1 ½ line to foam export valve FE-3 FOAM EXPORT inside pedestal (Fig ). 7) Open foam export valve FE-3 FOAM EXPORT located under pedestal (Fig ). 8) Start 60 GPM Foam Pump #2 (starboard side). 9) When transfer is completed, stop foam pump and return valves to normal positions. 10) Disconnect hose and fittings. 11) Flush fittings. 12) Flush system.

30 Page RECIRCULATING FOAM CONCENTRATE FOAM FILL 4 BLANK and GASKET SECURED BY FOUR 15/16 BOLTS 1 ½ MANUAL FOAM EXPORT VALVE FE-3 FOAM EXPORT Figure BLANK SHOWN REMOVED BOLTS, NUTS and GASKET CAN BE USED TO SECURE BLANK or TO ATTACH FILL PIPE EXTENSION MANUAL FOAM EXPORT VALVE FE-3 FOAM EXPORT FOAM CONCENTRATE FROM TANK FOAM FILL PIPE EXTENSION Figure Figure

31 Page ) Inside the pedestal, remove the blank from the 4 FOAM FILL (Fig ). 2) Using the gasket, nuts, and bolts previously used to secure the blank, attach the foam fill pipe extension to the Foam Fill flange (Fig , -92). 3) Inside the pedestal, connect the female coupling of one section of 1 ½ hose to the manual 1 ½ Foam Export Valve FE-3 FOAM EXPORT (Fig ). 4) Insert the male end of the 1 ½ hose into the foam fill pipe extension (Fig ). SEE 5) to 9) for PORT SIDE FOAM TANK SEE 10) to 14) for STARBOARD SIDE FOAM TANK Recycling Port Side Foam Tank 5) Open port Main Foam Tank valve FTS-2 P FOAM SUCT (Fig ). 6) Open pump inlet valve FP-4A #4 FOAM SUCT (Fig ). 7) Open Foam Pump #4 discharge E valve FP-4B #4 DISCH (Fig ). 8) Open manual foam export valve FE-2 P FOAM EX in the Engine Room (Fig ). 9) Start 60 GPM Foam Pump #4 (port side).

32 Recycling Starboard Side Foam Tank Page ) Open starboard Main Foam Tank valve FTS-1 S FOAM SUCT (Fig ). 11) Open pump inlet valve FP-3A #3 FOAM SUCT (Fig ). 12) Open Foam Pump #3 discharge E valve FP-3B #3 FOAM DISCH (Fig , -62). 13) Open manual foam export valve FE-1 S FOAM EX in Engine Room (Fig ). 14) Start 60 GPM Foam Pump #4 (starboard side). Upon completion of recycling either port or starboard foam tank: 1) Stop foam pump. 2) Return valves to normal positions. 3) Disconnect fill pipe extension. 4) Reinstall 4 FOAM FILL blank. 5) Flush system with fresh water. CAUTION Remember that foam, either as concentrate or in a foam/water solution, is an extremely powerful detergent. Painted surfaces and other equipment will be etched or otherwise damaged if left in contact with foam in any form. After foam operations, it is essential to rinse the fireboat and all equipment thoroughly with fresh water.