This document covers flexible and semiflexible, reinforced and unreinforced air hoses fabricated from laminated and impregnated fabric, intended for use in aircraft heating, air conditioning, ventilating, defrosting and/or deicing systems.

Classifications:

Hoses furnished under this document shall be of the following operating temperature classifications and constructions shown in Table 1.

Grades:

Grades shall be designated by a letter code as shown in Table 2, and utilized as required on standards and drawings to differentiate hose operating pressures, and to specify hose classification.

Forms:

The hose shall be wire reinforced in one of the following forms:

a. Form 1: Helical - wire (metallic or nonmetallic) reinforcement which can be axially compressed, but not elongated beyond its free length.

b. Form 2: Helical convoluted - Wire (metallic) reinforcement, if specified, which can be axially compressed and elongated.

c. Form 3: Annular convoluted - Wire ring reinforcement if required for pressure, which can be axially compressed and elongated.

d. Form 4: Sleeve - No reinforcement other than fabric which cannot be axially compressed or elongated.