MIL-DTL-27267D
TABLE III. Hose sample sizes and test conditions. 1/
Length of 6
Room
Length of 10
High
Bend
Proof
Operating
Hose samples for samples for all
temperature
temperature
radius
pressure pressure
Size impulse test
burst pressure
other tests
burst pressure
inches
psi (MPa) psi (MPa)
inches (mm) inches (mm) 2/
psi (MPa)
psi (MPa)
(mm)
3000
2.00
-4
14.0 (355.6)
18.0 (457.2)
1500 (10.3)
12000 (82.7)
7000 (48.3)
(20.7)
(50.8)
3000
2.00
-5
16.0 (406.4)
18.0 (457.2)
1500 (10.3)
10000 (68.9)
6500 (44.8)
(20.7)
(50.8)
3000
4.00
-6
18.0 (457.2)
18.0 (457.2)
1500 (10.3)
9000 (62.1)
6500 (44.8)
(20.7)
(101.6)
3000
4.63
-8
21.0 (533.4)
18.0 (457.2)
1500 (10.3)
8000 (55.2)
6000 (41.4)
(20.7)
(117.6)
3000
5.50
-10
23.5 (596.9)
18.0 (457.2)
1500 (10.3)
7000 (48.3)
5500 (37.9)
(20.7)
(139.7)
2000
6.50
-12
27.5 (698.5)
18.0 (457.2)
1000 (6.9)
5000 (34.5)
3500 (24.1)
(13.8)
(165.1)
2500
7.38
-16Z
18.0 (457.2)
18.0 (457.2) 3/
1250 (8.6)
5000 (34.5)
3500 (24.1)
(17.2)
(187.5)
2000
11.00
-20Z
18.0 (457.2)
18.0 (457.2) 3/
1000 (6.9)
4000 (27.6)
3000 (20.7)
(13.8)
(279.4)
2000
14.00
-24Z
18.0 (457.2)
18.0 (457.2) 3/
1000 (6.9)
4000 (27.6)
3000 (20.7)
(13.8)
(255.6)
1/ Metric equivalents are given for information only.
3/ Samples for the low temperature flexibility and the vacuum tests shall be 30 inches (762 mm) long for
these sizes.
3.5.2 Tube. The extruded PTFE tube shall meet the following requirements.
3.5.2.1 Tube roll and tube proof pressure. The tube shall not leak, split, burst, or show any evidence
of malfunctioning when tested in accordance with 4.6.2.1.
3.5.2.2 Tensile strength. When tested in accordance with 4.6.2.2, the longitudinal tensile strength for
all sizes of tubes shall be not less than 3000 psi (21 MPa). The transverse tensile strength for sizes 10
and larger shall be not less than 2500 psi (17 MPa). For sizes under -10, the transverse tensile strength
need not be tested.
3.5.2.3 Elongation. Elongation of the tube shall be not less than 200% when tested in accordance
with 4.6.2.2.
3.5.2.4 Specific gravity. When tested in accordance with 4.6.2.3, the apparent specific gravity of the
tube shall be not greater than 2.155 and its relative specific gravity shall be not greater than 2.210 for all
sizes of tubes.
6
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