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Tubing Rigid Flashcards

(23 cards)

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1
Q

Weights of hard drawn copper?

A
  1. K
  2. L - HVAC
  3. M
  4. DMV
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2
Q

Swaging

A
  1. Cut with tube cutter
  2. Debur (Ream)
  3. Measure block (1/8 plus diameter)
  4. Hammer and form
  5. Inspect
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3
Q

Flaring

A
  1. Cut
  2. Debur
  3. Block (1/3 diameter)
  4. Flaring yoke
  5. Inspect (smooth, cracks, fully fits in flare nut
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4
Q

Bending Tool

A
  1. 0, 45, R, L Zero = Angle
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5
Q

Work Hardening

A

Too much bending of copper. (Hardens copper)

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6
Q

Annealing

A

Heat up to “cherry red” and let air cool.

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7
Q

Do not collapse copper while bending

A
  1. Restricts flow
    A. Refrigerant
    B. Oil
  2. Appearance
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8
Q

Solder a copper pipe procedures - below 800 degrees

A
  1. Clean - male and female
  2. Flux (male only)
  3. Heat male then fittings
  4. Filler melted by metal, not the flame
  5. Fill
  6. Wipe clean
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9
Q

Braze a copper pipe procedures - Above 800 degrees

A
  1. Clean - male and female
  2. Flux (male only)
  3. Heat male then fittings
  4. Filler melted by metal, not the flame
  5. Fill
  6. Wipe clean
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10
Q

When brazing, what indications let you know it is okay to braze?

A
  1. Melting flux
  2. Cherry red
  3. Green secondary flame
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11
Q

Phosgene Gas

A

Burning refrigerant

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12
Q

Solder in system

A
  1. Restricts
  2. Compressor damage
  3. Oil contamination
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13
Q

How much solder do you use?

A

Diameter of tube

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14
Q

Over heating flux

A
  1. Burns
  2. Improper flow
  3. Oxidation
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15
Q

Torch (Air acetylene) Startup

A
  1. Crack tank
  2. Regulator, hose, torch
  3. No more than 1/4 - 1/2 turn
  4. Regulator middle position
  5. Open torch
  6. Light with a striker!
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16
Q

Torch (Oxy acetylene) Startup

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A
  1. Crack tank
  2. Regulator, hose, torch
    A. Green - Right handed
    B. Red - left threads
  3. Regulators
    A. Acetylene
    1. Tank open 1/4 - 1/2
    2. Open torch valve
    3. Regulator to 5 psig
    4. Close torch valve
    B. Oxygen
    1. Tank open all the way
    2. Open torch valve
    3. Regulator to 10 psig
    4. Close torch valve
    Tank shut down
    1. Shut off torch
    2. Close tank
    3. Bleed off pressure
    4. Close torch
    5. Back off regulator
17
Q

Diesel effect

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A

When air / oxygen mixed with an oil, it could explode. (Nothing with oxygen!!)

18
Q

Types of fillers

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A
  1. Copper - copper - phis
  2. Steel - copper - (Silphos - Solder)
    FYI - Heat steel first!
19
Q

Iron Pipe

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A
  1. Seamless pipe (Black pipe)
  2. No burred threads!
  3. Weights
    A. Standard
    B. Extra strong
    C. Double extra strong
20
Q

Iron Pipe threads - Procedure

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A
  1. Cut pipe (with pipe cutter)
  2. Debur
  3. Oil
  4. Die head (90 degree cut; 180 degree back)
  5. Clean threads
  6. Oil
  7. Taper threads (7 perfect, 2 imperfect)
21
Q

Nipple Kit (For Steel Piping)

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A
  1. Closed = 1 inch (all threads)
  2. Short - small shoulder (middle)
  3. 2” - 12” at 1/2” increments
22
Q

Types of bending tools

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A
  1. Mandrel - Also called mechanical
  2. Spring
  3. Compression
  4. For 180 degree bends
    Radius = Sydia
23
Q

ACR Tubing

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A

Outside diameter (O.D.)

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