MIL-DTL-17505F
3.4.6 Nipples and flanges. For oil transfer, steel, bronze, or brass nipples and flanges, or integral
flanged aluminum-alloy nipples may be used. For gasoline, JP-5 and JP-8 transfer, bronze, brass,
or integral flanged aluminum-alloy nipples and flanges shall be used, as specified (see 6.2). The
steel nipples shall be cut from standard pipe and the exterior ends shall be consistent with the type
of flanges to be used with regards to fastening. If the nipple is threaded, it shall be in accordance
with FED-STD-H28. Two bands shall be welded or shrunk not less than 2 inches (51 mm) apart
on the exterior of the nipple. The steel flanges shall be the screwed, welded, or welded slip-on
type of forged steel in the 150-pound (68 kilograms (kg)) class, with dimensions, facings, and
drillings in accordance with ANSI B16.5. Bronze and brass flanges shall be screwed, welded, or
welded slip-on type in the 150-pound (68 kg) class with dimensions, facings, and drillings in
accordance with ANSI B16.24. Use of epoxy resin as a thread sealant is acceptable.
3.4.6.1 Integral flanged aluminum-alloy nipples. The composition of the integral flanged
aluminum-alloy nipple shall conform to ASTM B 443.0 alloy temper F. The nipple shall be
reinforced to withstand usage comparable to that of the steel specified in, or alloy 356.0 temper
T6 of ASTM B 26/B26. The fillet of the flanged nipple shall be reinforced to withstand usage
comparable to that of the steel specified in 3.4.6. The nipple portion of the aluminum-alloy nipple
shall have cast bands on the exterior of the nipple. Nipples shall be made an integral part of the
hose by means of a round, steel wire spiraled over the textile carcass over the nipple area. The
helix wire or wires shall be carried over the nipple area to provide additional anchorage. End
blocks of plies of fabric impregnated with synthetic rubber compound shall be applied over the
nipple area tapering into the hose body. The integral swivel couplings shall be secured to the
4-inch (102 mm) hose in the same manner and shall protrude 12 inches (305 mm) into the hose.
As an option, assemblies may be assembled using aluminum-alloy pipe with aluminum bands
welded on and forged aluminum-alloy slip-on welding flanges. The assemblies shall maintain
strength and tightness. The flange dimensions and drillings shall be the same as specified for steel
flanges except that the flange shall not have a raised face.
3.4.7 Integral swivel connection couplings. The integral swivel couplings for the 4-inch
(102 mm) hose shall have two bands cast, brazed, or shrunk onto the exterior. Construction shall
be such that the integral nipples shall interface with the hose in the same manner as do the nipples.
The composition of the integral swivel couplings shall conform to ASTM B 584, copper alloy,
UNS No. C 84400.
3.5 Resistance to vacuum. The hose shall not collapse or blister or show any other indication of
failure when subjected to a vacuum as specified in 4.7.4.
3.6 Volume swell of tube and cover compound. The percentage of swelling of the tube and
cover in the special testing fuel, as determined by the method specified in 4.7.11, shall be not
greater than 50 percent for the tube and 80 percent for cover.
3.7 Soluble nonvolatile requirement of tube compound. When tested as described in 4.7.16, the
soluble nonvolatile matter in the tube shall be not greater than 6 percent.
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