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Stratoflex approved aircraft hose shop
- FAA/TSO Approved
- Order 800-433-3564
- Fax 916- 421-5719
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Glossary of Aircraft Hose Terms
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Assembly length Hoses assembly length is measured from end of nipple
to end of nipple, or flare to flare. This is the same as connection length
(the distance between connections). Length is stated in inches and 1/8
inch. Example 0244 is 24 inches and 4/8 of an inch.
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Blisters - A raised spot on the surface of the hose - usually
containing air - sometimes referred to as voids or bubbles.
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Blow Down Blow Down - a term used to define rapid decompression
of a pneumatic hose. This can result in the collapse of the inner tube
caused by entrapped air in the hose structure trying to return to the inside
of the tube.
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Carcass The fabric, cord and/or metal reinforcing section of the
hose, as distinguished from the inner tube and cover.
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Collapse a term used to indicate the closing of the inside diameter
of the hose due to kinking, vacuum, or other form of abuse.
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Effusion the flow of gas under pressure through a rubber layer
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Installation Tip If you have a bundle of hoses that you must install
and don't know where each hose is supposed to go then its best to start
with the shortest hose and work your way to the longest. This way you won't
end up with a hose that is too short.
Hose Identification bands are spot welded to prevent removal
without destroying the band.
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Wire Throw-Out In braided hose, a broken end or ends in the wire
reinforcements protruding from the surface of the braid.
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Length Changes Allow enough slack in the hose line to provide for
changes in length when pressure is applied. The hose will change in length
from -2% to -4%.
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O.D... Outside diameter
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Pin Pricked Cover hose whose cover has perforations to permit the
effusion of gas to the atmosphere.
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Proof pressure the pressure applied to a hose assembly to ensure
proper installation of fittings. This pressure is usually twice the operating
pressure of the hose. To qualify, the hose assembly must contain this pressure
without leaking for a specified period of time.
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Safety factor safety factor - the difference between
minimum burst pressure and the maximum operating pressure - usually
four to one.
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Compound twist angle When both fittings
on a hose are angled fittings and the fittings go off in different directions,
the angular relationship between fittings is termed the compound twist
angle.
Installing an angle fitting on Stratoflex 156 hose
Twist angle is determined by the number of degrees between the fittings.
For compound twist angles, hold the hose upright with the lower fitting
on the center of this page and the upper fitting facing you. The direction
of the lower fitting faces is the compound angle of the hose.
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