Table 4-23. Proof Test Pressures, Medium-Pressure Teflon Hose Assemblies
Swivel end fittings
When installation of Teflon hose assemblies requires bending, the radius shall not be less than
minimum bend indicated in table 4-21. A larger radius than minimum allowed is preferred.
The following precaution in flexing installations will help prevent kinking Bend hose in the same
planes as movement to avoid twisting.
Hose flexing in two directions shall be clamped at the point where hose changes planes. This
has the effect of dividing the hose into sections, each in one plane.
Install flared swivel connections according to torque values shown in table 4-25.
Storage of hose and assemblies. Teflon hoses will be stored in accordance with the following
Age limitations. Teflon hose has a nearly unlimited life in storage. No age limitations have
been established on medium pressure hose, MIL-H-27267, and high pressure hose, MIL-H-38360.
Hose. Tape ends of hose to prevent wire flareout. Storage In a straight position is preferred. If
coiling is necessary, large loose coils are preferred.
Under no circumstances shall hose be piled to a height which could result in damage to the lower sections.
This caution applies to hose In cartons as well as to unpackaged hose.
Hose assemblies. Cap or plug ends of all hose assemblies during storage with polyethylene
protective plugs conforming to National Aerospace Standard (NAS) 815 or to paragraph 4-5k.
Hose disposition. Condemn all hose or fittings which are scrapped on tear-down, or hose and hose
assembly in supply which become damaged, deteriorated, or otherwise unsatisfactory for use on aircraft, missiles, and
related accessories in accordance with existing disposition instructions.
4-66 Change 2