6.6 Flashcards
(36 cards)
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
