UNDERWAY REPLENISHMENT NWP 4-01.4 - Historic Naval Ships ...

NWP 4-01.43. Place hose crimper (6) on hose near the quickdisconnectcoupling (7). Open air dump valve(8) to ensure that fuel riser is free of oil, thenclose air dump valve.4. Open quick-disconnect coupling (7) and manuallyinsert pig (5) into hose. The end of the pigshould clear the face of the coupling by about 2inches (50.8 mm) to prevent interference whenrecoupling.5. Reconnect coupling (7) and remove hosecrimper (6).6. Open blowdown shutoff valve (4).NoteAt this time, fuel shutoff valve (1) and airdump valve (8) should be closed and quickclosingfuel valve (2) and blowdown shutoffvalve (4) should be open.7. Monitor hose pressure gauge (9) until measuredpressure starts to drop.NoteThe pressure at the hose pressure gauge willremain basically constant as the pig (5)travels through the hose. The actual pressurereading indicated depends on the supply ofair pressure and the elevation of the fuelriser on the receiving ship and will normallybe between 5 and 35 psig. When the pigreaches the catcher (14) (3 to 5 minutes afterlaunching), the air in the hose will vent pastthe pig and the pressure reading on the hosepressure gauge will start to fall. This is thesignal that the pig has entered the pig catcherand procedures for terminating the blowdowncan commence.8. When hose pressure starts to drop, closeblowdown shutoff valve (4). Open air dumpvalve (8) to hasten venting of air from hose.9. When hose pressure gauge (9) reads zero psig,secure filling station by closing all valves (1, 2,4, and 8).J.2.2 Operating Instructions for ReceivingShipJ.2.2.1 Preliminaries to Blowdown Operation1. Ensure that pig catcher (14) is present in NATOcoupling B-end (13) prior to connecting asternFAS hose to fuel riser.2. After fueling operations are completed, signaldelivery ship to “Start blowdown.”CAUTIONThe astern FAS hose may contain up to1,200 gal (4,542 L) of fuel that will beremoved by the blowdown operation. Thereceiving ship must therefore reservesufficient fuel tank capacity to contain thisadditional quantity of fuel.J.2.2.2 Post-Blowdown Operation. The postblowdownoperation proceeds after the “Stop blowdown”signal is received from the delivery ship.1. Disconnect hose at NATO coupling (13) andremove the pig catcher (14) from the end ofhose.2. Remove pig (5) from pig catcher (14) and disposeof pig.3. Replace pig catcher (14) in NATO coupling B-end(13) and secure conical cap (12) to coupling.4. The astern FAS hose may now be disengaged fromthe receiving ship as set forth in this publication.J.3 REQUIRED MODIFICATIONSThe following paragraphs describe the modifications tobe made on tankers to permit use of pigs for hosecleanout. The tankers must already be equipped withastern refueling stations and blowdown air supplies.J.3.1 Orifice Installation. The orifice (see paragraphJ.1.4) is to be installed in the existing blowdownair supply line downstream of the shutoff valve, asshown in Figure J-3.J-5 ORIGINAL