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

NWP 4-01.43.7.3.1.2 2-1/2 Inch (63.5 mm) Alongside FuelDelivery Hose. This hose can be used in fuelSTREAM rigs under the 7-inch (177.8 mm) single hoseor by itself in a close-in or spanline rig. Standard issuelength is 35 feet (10.6 m). Virgin, 2-1/2-inch-(63.5mm), alongside fuel delivery hose, from stock, can beused for either F76, F44, or water transfer. After thefirst transfer of a product, the hose takes on the product’sidentity. The hose can only be used for that productfor all following transfers. Ship’s force must stencilon each hose at each end the product that can be transferredwith the hose.CAUTIONOnce a hose has been used for a product(fuel or water), do not use it for any otherproduct. Using a hose for a different productthan that for which it was first used maycontaminate fuel or water tanks.3.7.3.2 Hose Saddles (Flow-Through). The twotypes of hose saddle used with the 6-inch (152.4 mm) or7-inch (177.8 mm) hose are shown in Figure 3-4. Type“A” is 19 inches (482.6 mm) long and is used in the singlehoserig and for the lower hose in the double-hose rig.Type “B” is 32 inches (812.8 mm) long and is used forthe upper hose in the double-hose rig. Details of thesesaddles are shown in NAVSHIPS Std Plans 810-1385957 and 810-1385962. Hose saddles used in the2-1/2 inch (63.5 mm) hose rig are similar in design andare shown in NAVSHIPS Std Plan 803-2260818.3.7.3.3 Hose Couplings (MILSPEC MIL-C-24356). The hose couplings for 2-1/2-inch (63.5 mm),4-inch (101.6 mm), 6-inch (152.4 mm), and 7-inch(177.8 mm) hoses are re-attachable couplings of maleand female design. The female end incorporates a rubberO-ring for sealing the joint. A split clamp and bandassembly is used to attach the male and female couplingstogether.3.7.3.4 Riding Line Fittings (Flow-Through).The riding line fittings for 2-1/2-inch (63.5 mm),4-inch (101.6 mm), 6-inch (152.4 mm), and 7-inch(177.8 mm) hoses are flow-through design. Detailsof these fittings are shown in NAVSHIPS Std Plans803-3360819 (for the 2-1/2-inch (63.5 mm) fitting),805-4472630 (for the 4-inch (101.6 mm) fitting),810-1385968 (for the 6-inch (152.4 mm) fitting), and810-1385969 (for the 7-inch (177.8 mm) fitting).3.7.4 Fueling Couplings. A variety of fuelingcouplings are required to provide for the compatibilityof the delivery and receiving ships. The couplings aredescribed in the following paragraphs.3.7.4.1 Single Probe. The single-probe fuelingcoupling consists of a fueling probe and receiver asshown in Figure 3-5. See NAVSEA Technical Manual0978-LP-035-3010. The probe fueling system is approvedfor the transfer of F76 and F44 fuel.3.7.4.1.1 Single Probe and Carrier Assembly.The single probe and carrier assembly (Figure 3-5) isattached to the delivery ship’s hose and consists of atrolley carriage, a tube, and a probe. The trolley carriageis hinged so that it can be rigged to the spanwirewithout disassembly of parts. The four sheaves in thecarriage are of different diameter. Ensure sheaves areinstalled as shown in Figure 3-6 for correct alignmentof the probe to the receiver. The tube serves as a trainingmechanism and provides a means for connectingthe fuel hose to the probe. The probe has a latchingmechanism that holds the probe in the receiver byspring force. The probe also has a built-in sliding sleevevalve that opens on proper engagement with the probereceiver and automatically closes upon disengagementduring fuel transfer. A line pull of about 300 lb (136 kg)on the messenger or remating line is required to engagethe probe in the receiver. A designed line pull of 2,500lb (1,134 kg) (plus or minus 500 lb (227 kg)) on the retrievingline will disengage the probe from the receiver.3.7.4.1.2 Single-Probe Receiver. The receiver(Figure 3-5) is mounted on the receiving ship andconsists of a swivel arm assembly, the receiver, and amanual release lever. A pelican hook, used as thespanwire attachment point, is an integral part of theswivel arm assembly. The receiver is mounted on theswivel arm, which keeps the receiver directly in linewith the spanwire and the probe. The arrangementprovides excellent alignment during connect-up ofthe probe to the receiver, providing the messengerfairlead block has been installed on the side of theprobe swivel joint that is opposite from the side of theline pull (see Figure 3-26). The manual release levercan be mounted on either the forward or aft side ofthe receiver to suit local conditions. Latch indicatorflags, mounted on each side of the housing, indicatewhen the probe is fully engaged in the receiver (seeFigure 3-27). When the probe is engaged, the flagsare in the raised position; when the probe is disengaged,the flags are in the stowed position.3-7 ORIGINAL