Bulletin 4480-T7-U
arr
krimp
arker Hanni
n
orporation
Pr
t
Divi
i
n
ickli
e,
Parker manufacturers special Hose for aerospace in fl ight applications. Aerospace
in fl i
ht applications emplo
in
Hose to transmit fuel, lubricatin
fl uids and h
draulic
uids require a special Hose with a conductive inner tube. This Hose
or in
i
ht
applications is available only from Parker’s Stratofl ex Products Division. Do not
se an
other Parker Hose for in fl i
ht applications, even if electricall
conductive.
Use o
other Hoses
or in
i
ht applications or
ailure to properl
connect or
round
this Hose can cause a
re or an explosion resulting in death, personal injury , and
propert
dama
e. These Hose assemblies for in fl i
ht applications must meet all
applicable aerospace industr
, aircra
t en
ine, and aircra
t requirements.
2.2 Pressure: Hose selection must be made so that the published
maximum recommended workin
pressure of the Hose is equal to or
reater than
the maximum s
stem pressure.
ur
e pressures or peak transient pressures in
the system must be below the published maximum working pressure
or the Hose.
ur
e pressures and peak pressures can usuall
onl
be determined b
sensitive
lectrical instrumentation that measures and indicates pressures at millisecond
intervals. Mechanical pressure
au
es indicate onl
avera
e pressures and cannot
e use
to
eterm
ne sur
e pressures or pea
trans
ent pressures.
u
s
e
urst pressure ratin
s
or Hose is
or manu
acturin
test purposes onl
and is no
indication that the Product can be used in applications at the burst pressure or
t
erw
se a
ove t
e pu
s
e
max
mum recommen
e
wor
n
pressure.
2.3
uction: Hoses used
or suction applications must be selected to insure
that the Hose will withstand the vacuum and pressure of the s
stem. Improperl
e
ecte
ose ma
co
apse
n suct
on app
cat
on.
2.4 Temperature: Be certain that
uid and ambient temperatures, both
tead
and transient, do not exceed the limitations of the Hose. Temperatures
e
ow an
a
ove t
e recommen
e
m
t can
e
ra
e
ose to a po
nt w
ere
a
ailure ma
occur and release
uid. Properl
insulate and protect the Hose
ssembl
when routin
near hot ob
ects
e.
. manifolds
. Do not use an
Hose
in an
application where failure of the Hose could result in the conve
ed fl uids
or
vapors or mist
rom the conve
ed
uids
contactin
an
open
ame, molten metal,
r other potential fi re i
nition source that could cause burnin
or explosion of the
onve
ed fl uids or vapors.
2.5 Fluid
ompatibilit
: Hose Assembl
selection must assure compatibilit
f the Hose tube, cover, reinforcement, and Fittin
s with the fl uid media used.
ee the fl uid compatibilit
chart in the Parker publication for the product bein
onsidered or used. This in
ormation is o
ered onl
as a
uide. Actual service li
e
an onl
be determined b
the end user b
testin
under all extreme conditions and
t
er ana
s
s.
ose that is chemicall
compatible with a particular
uid must be assembled usin
ittin
s and adapters containin
likewise compatible seals.
2.6 Permeation: Permeation
that is, seepa
e throu
h the Hose
will occur
rom inside the Hose to outside when Hose is used with
ases, liquid and
as
uels,
and refri
erants
includin
but not limited to such materials as helium, diesel fuel,
asoline, natural
as, or LPG
. This permeation ma
result in hi
h concentrations
vapors which are potentiall
ammable, explosive, or toxic, and in loss o
uid.
Dan
erous explosions, fi res, and other hazards can result when usin
the wron
ose for such applications. The s
stem desi
ner must take into account the fact
that this permeation will take place and must not use Hose i
this permeation could
e hazardous. The s
stem desi
ner must take into account all le
al,
overnment,
insurance, or an
other special re
ulations which
overn the use of fuels and
e
ri
erants. Never use a Hose even thou
h the
uid compatibilit
is acceptable
without considerin
the potential hazardous effects that can result from permeation
t
rou
t
e
ose
ssem
.
P
rm
ti
n
m
i
t
r
r
m
t
i
th
H
t
in
i
th
H
will
l
r
in Hose assemblies, re
ardless of internal pressure. If this moisture permeation
would have detrimental effects
particularl
, but not limited to refri
eration and air
onditionin
s
stems
, incorporation o
su
cient dr
in
capacit
in the s
stem or
ther appropriate s
stem safe
uards should be selected and used.
2.7 Size: Transmission of power b
means of pressurized fl uid varies
with pressure and rate o
ow. The size o
the components must be adequate to
eep pressure losses to a minimum and avoid dama
e due to heat
eneration or
xcessive fl uid velocit
.
.
Routin
: Attention must be
iven to optimum routin
to minimize
inherent problems
kinkin
or fl ow restriction due to Hose collapse, twistin
of the
ose, proximit
to hot ob
ects or heat sources
.
2.9 Environment:
are must be taken to insure that the Hose and Fittin
s
are either compatible with or protected from the environment
that is, surroundin
onditions
to which the
are exposed. Environmental conditions includin
but not
imited to ultraviolet radiation, sunli
ht, heat, ozone, moisture, water, salt water,
hemicals, and air pollutants can cause de
radation and premature failure.
2.10 Mechanical Loads: External forces can si
nifi cantl
reduce Hose life
r
il
r
. M
h
ni
l l
whi
h m
t
n
i
r
in
l
x
iv
exin
, twist, kinkin
, tensile or side loads, bend radius, and vibration. Use of swivel
t
pe
tt
n
s or a
apters ma
e requ
re
to
nsure no tw
st
s pu
into the Hose. Unusual applications may require special testing prior to Hose
t
n.
.11 Ph
sical Dama
e:
are must be taken to protect Hose
rom wear,
snagging, kinking, bending smaller that minimum bend radius, and cutting, any of
which can cause premature Hose failure. An
Hose that has been kinked or bent to
a radius smaller than the minimum bend radius, and an
Hose that has been cut or
is cracked or is otherwise damaged, should be removed and discarded.
.12 Proper End Fittin
: See instructions 3.2 throu
h 3.5. These
ecommendations ma
be substantiated b
testin
to industr
standards such as
AE J517
or hydraulic applications, or MIL-A-5070, A
1339, or A
3517
or Hoses
from Parker’s Stratofl ex Products Division for aeros
ace a
lications.
.
Len
th: When establishin
a proper Hose len
th, motion absorption,
ose length changes due to pressure, and Hose and machine tolerances and
m
v
m
nt m
t
n
r
.
.14
peci
cations and
tandards: When selectin
Hose and Fittin
s,
overnment, industr
, and Parker specifi cations and recommendations must be
eviewed and followed as a
licable.
.15 Hose
leanliness: Hose components ma
var
in cleanliness levels.
are must be taken to insure that the Hose Assembl
selected has an adequate
evel of cleanliness for the a
lication.
.16 Fire Resistant Fluids:
ome
re resistant
uids that are to be conve
ed
b
Hose require use of the same t
pe of Hose as used with petroleum base fl uids.
ome such fl uids require a special Hose, while a few fl uids will not work with an
ose at all.
ee instructions 2.5 and 1.5. The wron
Hose ma
ail a
ter a ver
short service. In addition, all liquids but pure water ma
burn fi ercel
under certain
on
t
ons, an
even pure water
ea
a
e ma
e
azar
ous.
.
7 Radiant Heat: Hose can be heated to destruction without contact b
such nearb
items as hot manifolds or molten metal. The same heat source ma
then initiate a fi re. This can occur des
ite the
resence of cool air around the Hose.
.
Weldin
or Brazin
: When usin
a torch or arc-welder in close
proximit
to h
draulic lines, the h
draulic lines should be removed or shielded with
appropriate fi re resistant materials. Flame or weld spatter could burn throu
h the
ose and possibl
i
nite escapin
uid resultin
in a catastrophic
ailure. Heatin
f plated parts, includin
Hose Fittin
s and adapters, above 450°F
232°C
such as
ur
n
we
n
,
raz
n
, or so
er
n
ma
em
t
ea
ases.
.1
At
mi
R
i
ti
n: At
mi
r
i
ti
n
t
ll m
t
ri
l
in H
assemblies. Since the lon
-term effects ma
be unknown, do not expose Hose
m
t
t
m
r
t
n.
.
Aerospace Applications: The onl
Hose and Fittin
s that ma
be used
for in fl i
ht aerospace applications are tHose available from Parker’s Stratofl ex
Products Division. Do not use an
other Hose or Fittin
s for in fl i
ht applications.
Do not use an
Hose or Fittin
s
rom Parker’s
trato
ex Products Division with
an
other Hose or Fittin
s, unless expressl
approved in writin
b
the en
ineerin
mana
er or chief en
ineer of Stratofl ex Products Division and verifi ed b
the user’s
wn testin
and inspection to aerospace industr
standards.
.21 Unlockin
Couplin
s: Ball lockin
couplin
s or other couplin
s with
disconnect sleeves can unintentionall
disconnect if the
are dra
ed over
bstructions or i
the sleeve is bumped or moved enou
h to cause disconnect.
Threaded couplin
s should be considered where there is a potential for accidential
ncoup
n
.
.0 H
SE AND FITTING ASSEMBLY AND INSTALLATI
N
IN
TR
TI
N
.1
omponent Inspection: Prior to assembl
, a care
ul examination o
the Hose and Fittin
s must be performed. All components must be checked for
orrect st
le, size, catalo
number, and len
th. The Hose must be examined for
leanliness, obstructions, blisters, cover looseness, kinks, cracks, cuts or an
other
visible defects. Inspect the Fittin
and sealin
surfaces for burrs, nicks, corrosion
r other imperfections. Do NOT use an
component that displa
s an
si
ns of
n
n
n
rm
n
.
.2 Hose and Fittin
Assembl
: Do not assemble a Parker Fittin
on a
Parker Hose that is not specifi call
listed b
Parker for that Fittin
, unless authorized
in writin
b
the en
ineerin
mana
er or chie
en
ineer o
the appropriate Parker
division. Do not assemble a Parker Fittin
on another manufacturers Hose or a
Parker Hose on another manufacturers Fittin
unless
i
the en
ineerin
mana
er or
hie
en
ineer o
the appropriate Parker division approves the Assembl
in writin
r that combination is expressl
approved in the appropriate Parker literature for the
specifi c Parker product, and
ii
the user verifi es the Assembl
and the application
throu
h anal
sis and testin
. For Parker Hose
afet
Guide for Selectin
and Usin
Hose, Fittin
s and Related Accessories
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