6.6 Flashcards
what are rigid fluid lines generally made of
metal
how is the diameter measured and in what increments
the external diameter in 1/8 inch increments
what is the pressure for high pressure rigid fluid lines
over 1500 psi
what is the pressure for medium pressure rigid fluid lines
under 1500 psi
what is the pressure for low pressure rigid fluid lines
suction or return lines
what are medium and low pressure rigid fluid lines generally made of
aluminium
what are rigid fluid lines marked with
part number, drawing number, inspection stamp, test stamp and date of manufacture
how are fluid lines identified
colour codes, words and symbols
where is the identification of the pipe placed
on both ends of the line
how are pipes connected to make sure they are not deformed
threaded fitting over a protective collar
what is the flare angle for connecting rigid tubing
37°
what is the main characteristic of harrison fitting
it swages from the inside and is used on thin walled tubes
what is a swaged fitting
soft metal permanently deformed onto the pipe
what are the 3 parts of a flexible fluid line
inner layer, reinforcing layer and outer cover
what are the 4 compounds of the inner layer and what fluids are they used for
neoprene- petroleum
buna-n petroleum and is better than neoprene
butyl- phosphate ester (hydraulic)
teflon- nearly every fluid
what does the reinforcing layers do
prevent the hose from increasing in diameter which would decrease the length
what is the purpose of the outer cover
protect the hose from physical damage
what is on the outer cover to show if a hose is twisting
lay line
how is the size of flexible fluid lines measured and in what increments
the inner diameter and in 1/16 inch
what is the pressure for low pressure flexible fluid lines
up to 4000KPA
what is the pressure for medium pressure flexible fluid lines
up to 20,000KPA (3000psi)
what is the pressure for high pressure flexible fluid lines
over 20,000KPA (3000psi)
what is the reinforcement required for low pressure flexible lines
one layer of cotton braid reinforcement
what is the reinforcement required for medium pressure flexible lines
one layer of cotton braid reinforcement and one layer of stainless steel braid reinforcement
what is the reinforcement required for high pressure flexible lines
at least 2 layers of steel braid reinforcement
what are the 2 types of fitting for a flexible fluid line
swayed edge or re-useable
when are blanking caps/ end stops used
when a fluid line is disconnected or removed and it has open ends
why are blanking caps / end stops used
to stop anything from leaking out of the pipe and stop anything getting in
what do swivel fittings allow to happen
allows a coupling and hose connection to rotate without having to bend a tube
how does a gamah coupling work
clamp 2 pipes together by surrounding bulges on each with a rubber seal so it can flex a bit
what are the 3 parts of security on a gamah coupling
a 3 paw latch that locks
a secondary latch to lock the 3 paw
all 3 paws need to be lifted at the same time to take off the coupling
when are v retainer couplings used
to connect components in high temperature, high pressure pneumatic and mechanical applications
what are the 2 types of v retainer couplings and what’s the difference
v-retainer and v-band. a v-band has multiple segments instead of only one
when is a steel tag used to identify rigid tube lines
fluid lines in a hot, oily or cold environment
when is paint used to identify rigid tube lines
in the engine compartment when tape, decals could be sucked into the engine system
what is the difference between AN and AC flared tubed fittings
AN has a recess between head and thread
