A-A-52435A
2.3 Dimensions. Hose assemblies shall be of the dimensions specified in procurement
documents and in applicable drawings (see 5.2).
2.4 Hose assembly interchangeability. Unless otherwise specified, hose assemblies for each
particular size (inside diameter) shall be interchangeable with all other like hose assemblies
intended for the same use.
2.5 Performance.
2.5.1 Flexibility and leakage. Hose assemblies shall be capable of being bent around a mandrel
under an internal hydrostatic pressure in accordance with table I while at 300 degrees Fahrenheit
(F) [149 degrees Celsius (C)]. This shall be evidenced by the absence of leaks, deformation,
permanent set, or interior obstruction.
TABLE I. Mandrel diameters and hydrostatic pressure for flexibility and leak test.
Hose size
(inside diameter)
Mandrell diameter
Hydrostatic pressure
pounds per
inches
millimeters
inches
millimeters
square inch Kilopascals
3/16
4.8
5-1/2
139.7
1830
12617
1/4
6.3
7
177.8
1470
10135
7.9
203.2
1160
5/16
8
7998
9.5
279.4
890
3/8
11
6136
355.6
820
12.7
5654
1/2
14
457.2
750
15.9
5171
5/8
18
508.0
660
19.0
4551
3/4
20
635.0
440
25.4
3034
24
1
2.6 Environmental.
2.6.1 Vibration. The hose assemblies shall show no evidence of leakage after being subjected to
500 hours of vibration, followed by 24 hours of refrigeration at -65F and subsequent flexing
through 90 degree bends in four directions, followed by an additional 24 hours of vibration. The
vibration shall be performed with SAE 30 oil circulating at 300F (149C), 175 pounds per
square inch (psi) [1207 Kilopascals (kPa)], 116F (47C) ambient air temperature, .052 inch [1.3
millimeters (mm)] total displacement (double amplitude), at 30 cycles per second. Prior to
vibration, the sample shall be arranged to provide an initial slack of 3/16 inch (4.8 mm) and an
offset of 1-1/2 inches (38.1 mm) at an angle of 90 degrees to the direction of stroke. The
vibration may be performed continuously or intermittently.
2
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business