Fluid Lines Flashcards
What kind of materials are used today for rigid fluid line
Today rigid fluid lines are made from materials such as aluminum alloy , titanium , and corrosion resistant steel
Explain low pressure systems in rigid tubing
Low pressure systems are below 1000 psi. For ventilating air , pure aluminum is used
Explain medium pressure rigid lines
Medium pressure is 1,000 psi to 1,500 psi. And 5052 aluminum alloy is often used
What does H mean
Strain hardened
Explain high pressure systems rigid tubing
High pressure systems is 3000 psi. And corrosion resistant steel is used.
How is the size of rigid tubing determined?
Rigid tubing size is determined by its outside diameter in increments of 1/16 inch. Therefore a -4 B nut tubing is 4/16 or 1/4 inch in diameter
How do you find the inside diameter in rigid tubing
Subtract twice the wall thickness (printed on the tube ) from the outside diameter.
Example : if you have -8 tube with wall thickness of 0.072
8/16 = 1/2
0.5-(2x0.072) = 0.356
When cutting a new piece of rigid tubing
Cut 10% longer than the tube being replaced , for safety
What is deburring
A finishing process that removes sharp edges , and leaves materials with smooth edges
What tool did you use to cut rigid tubes in class
I used a roller type tube cutter
What materials can be used with a roller type tube cutter
Only materials such as copper, aluminum , or aluminum alloy
How accurate should your rigid line bends be
75 % of the original tube diameter
How do you join rigid tubing together
By using single flare connectors or double flare connectors, flare less connectors , or a house or clamps
What does a flared tube fitting consist of
A flared tube consist of a sleeve and a B nut
What are the two types of flares
Single flare and double flare
What happens if the flare is to big or to small
Leakage will occur
What two pieces of hardware go on a tube before flaring
A sleeve and a B nut
What is a flaring tool plunger
The flaring tool plunger is a two piece tool , including the plunger and grip die
What is a roll type flaring tool
The roll type flaring tool comes with a handle and is one piece
AN STEEL fittings are what color
AN STEEL fittings are colored black
AN ALUMINUM fittings are what color
AN ALUMINUM fittings are colored BLUE
What’s the difference between AN fitting and AC fitting
An AN fitting has a shoulder or recess , and an AC does not, also AN fitting has a longer body length
What are used to secure fluid line
Clamps are used
How do you repair rigid fluids
The most common problem in rigid fluids are leakage, depending on the percentage of the scratches and dents , you can decide wether to replace or repair
Flexible lines
Flexible fluid lines are connected to moving parts and in areas of high vibrations
Flexible hose construction
A flexible hose consist of an inner line a reinforcement layer and an outer cover
The inner line can consist of what materials
Neoprene, butyl , buna N , Teflon
Explain each inner compound
Neoprene : petroleum
Buna N : petroleum
Butyl : no petroleum, yes phosphate ester ( Skydrol)
Teflon : everything yes
What are some reinforcement layer
Reinforcement layers determine the strength of, some common ones are carbon steel wire , cotton , or stainless steel wire braid
What do hoses have a tendency to do
Increase in diameter and decrease in length
What is a lay line
A lay line identifies a hose and it also shows if the hose was installed properly, no twist
What are some types of flexible hoses
Low pressure 250 psi - 600 psi
Medium pressure 200 psi - 3,000 psi
High pressure 3,000 psi
In reusable fittings what do they consist ( flexible hose )
A socket, nipple , and a nut
