MIL-DTL-26499E
3.4.4 End connections. A nipple and swivel nut, in accordance with pamphlet CGA V-1, Compressed
Gas Association, connection No. 540, shall be silver soldered onto each end of the hose (see 3.4.6). The
nipple shank length shall not exceed 1.500 inches (38.10 mm). The nipple and swivel nut shall be made
of material conforming to ASTM B16/B 16M.
3.4.5 Ferrules. A hexagonal ferrule, approximately .500 inch (12.70 mm) long and
.750 inch (19.05 mm) across the flats, shall be provided at each end of the hose as shown on figure 1.
When held by a wrench, the ferrule shall prevent the twisting of the hose assembly during installation.
3.4.6 Silver soldering. The ferrule, corrugated hose, braided outer covering, and nipple shank shall be
silver soldered together at each end of the hose assembly as shown on figure 1. All soldering/brazing
operations shall use silver brazing alloys in accordance with QQ-B-654 and shall be of the following
classifications grade IV, V, or VI.
3.5 Performance.
3.5.1 Proof pressure. The hose assembly shall be capable of withstanding a proof pressure of 4,800
psig (330.95 bar) without leakage.
3.5.2 Low temperature. The hose assembly when subjected to low temperature testing in accordance
with 4.7.4 shall be capable of bending without damage 180° around a 4-inch (101.60 mm) diameter
mandrel.
3.5.3 Vibration. The hose assembly when tested in accordance with 4.7.5 shall be capable of
withstanding vibration of 3,600 cycles per minute (cpm) without failure, while the hose assembly is
pressurized to proof pressure 4,800 psig (330.95 bar).
3.5.4 Pressure impulse. The hose assembly when subjected to impulse pressure testing in
accordance with 4.7.6 shall be capable of withstanding 15,000 pressure impulses from 0 to 2,400 to 0
psig (0 to 1544.43 to 0 bar) without failure.
3.5.5 Hose assembly tensile strength. The hose assembly when subjected to the tensile strength
testing in 4.7.7 shall be able to withstand a tensile pull of 1,000 pounds (453.59 kg) without failure.
3.5.6 Burst pressure. The hose assembly when tested in accordance with 4.7.8 shall not burst or
otherwise break at any seam or junction at less than 9,600 psig (661.90 bar) hydraulic pressure.
3.6 Cleaning instructions. The hose assembly after cleaning shall meet the requirements of 4.7.9.
3.6.1 General cleaning instructions. Prior to and during assembly, metal chips, hose cuttings, and
other foreign material shall be removed during and after final assembly. Hose assembly components
shall be cleaned in accordance with the highest commercial standards. Precautions shall be used during
handling and assembly to preclude contamination of component parts. Final assembly and inspection
shall be done in a laminar-airflow clean work area whenever possible. Following completion of fabrication
and assembly operations, the hose assembly shall be thoroughly cleaned (see 3.6.2). The hose
assembly shall not be adversely affected by the cleaning method or procedures. The organization
performing the cleaning services shall have responsibility for all safety aspects of oxygen cleaning
procedures. Guidance for safe procedures can be found in ASTM G93.
5
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business