6.6 pipes and unions Flashcards
why is copper tubing unsuitable for aircraft
vibration caused it to become hard and brittle
what psi is a high pressure line
over 1500psi
what psi is a medium pressure line
less than 1500 psi
what is low pressure lines
suction and return lines
what material is best for medium and low pressure lines
aluminium due to weight saving
what material should fluid lines be made out of if they are in danger of being hit by stones, fire or landing gear area
steel or titanium
what is marked on a pipe
part number
drawing number
inspection stamp
date of manufacture
how is the info marked on a pipe
stencilled on the surface or surface ink stamped
how are fluid lines identified
by tape or a decal made up of colour codes, words, and geometric symbols.
in an oily, hot or cold environment how must fluid lines be identified
steel tags
why is paint used on fluid lines in the engine
due to fear of tags being sucked into engine
what is a pipe connector
union
threaded fitting which allows the pipe to be separated and reconnected without causing deformation to the pipes
how is many of the rigid tubing in modern aircraft connected
flared tubing ends
what does a flared tubing connector consist of
consists of a sleeve and flare nut
what is the flare angle on aircraft fittings
37*
what are the two types of flared fitting identification
an
ac
what are flared tube fittings made of
aluminium alloy
steel
copper based alloys
what is a commonly used repair system for repairing hydraulic lines
permaswage fittings
what fitting is virtually maintenance free
swaged fittings
what are the 4 different synthetic compounds used in the construction of the inner liner
neoprene
buna n
butyl
teflon
what are common reinforcement layers on hose made out of
cotton
rayon
polyester fabric
carbon steel wire
when pressure is applied to a hose, what happens to diameter and length
diameter increase
length decrease
what is the outercover usually made of
rubber impregnated fabric
or
stainless steel braid
what do lay lines show
mil spec numbers
manufacturer info
indicate if the hose is twisted when installed
what are Gamah couplings
threadless couplings that are lightweight and flexible
