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Block 1 > Copper Tube, Tubing And Fittings > Flashcards

Copper Tube, Tubing And Fittings Flashcards

1
Q

What color code is copper DWV?

A

Yellow

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2
Q

What color code is copper type L?

A

Blue

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3
Q

What color code is copper type K?

A

Green

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4
Q

What color code is copper type M?

A

Red

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5
Q

List 3 advantages of copper tube over steel pipes.

A

Malleability
Ductility
Corrosion resistance

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6
Q

List 3 types of copper type K, L, and M I. Order of wall thickness (thickest to thin) and state wall thickness for 1/2 “ tube in each.

A

Type K - 0.049”
Type L - 0.040”
Type M - 0.028”

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7
Q

List 3 applications of DWV copper tube in the piping trade.

A

Drains
Waste
Vents

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8
Q

List 3 applications of type K copper tubing in the piping trades.

A
  1. Water service lines - soft copper
  2. Water distribution systems
  3. Low-pressure steam lines
  4. Heating systems
  5. Gas fitting
  6. DWV systems
  7. O2 and other specialized hospital piping systems
  8. Oil piping systems
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9
Q

List the application of type L copper tube in

The gas industry

Plumbing

A

Gas industry- below grade piping if factory coated, above ground for all systems up to 1 1/4 “NPS.

Plumbing- DWV, Water service, Water distribution

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10
Q

What is the main application of type M copper tube?

A

Residential and light commercial on building water and heating lines.

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11
Q

In what ways does soft temper copper tube differ from hard temper copper tube?

A

Soft copper can be bent without the use of special bending tools.

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12
Q

What is the greatest disadvantage of copper pipe over iron or steel pipe?

A

Copper has a higher rate of expansion

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13
Q

One of the disadvantages of soft copper tube is that it has a tendency to sag. What precaution should be observed to overcome this problem in long horizontal runs of soft temper copper tube?

A

Use more hangers and closer spacing.

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14
Q

In what sizes is DWV tube manufactured?

A

1 1/4 through 6” , I n straight lengths of 12’ and 20”

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15
Q

What are the minimum sizes of tube made in the following types?

Type M
Type K
Type L
Type DWV

A

Type M - 1/4”
Type K - 1/4”
Type L - 1/4”
Type DWV - 1 1/4”

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16
Q

What is the essential difference between oxygen tube and regular type K or L tube?

A

02 tube is cleaned and capped

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17
Q

Copper pipe is made from 99.7% pure copper. Explain what 99.7% pure copper means.

A

The copper has only 0.3% impurities.

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18
Q

Copper is used with other metals to form metallic alloys. Name one copper alloy and list the materials (and %) from which it is compounded.

A

Yellow brass- 66% copper, 34% zinc

Red brass - 85% copper and 15% zinc

Bronze - 90% copper and 10% tin

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19
Q

Use the types of copper tube used for the following applications :

  1. Hot and cold water lines
  2. Drainage waste and vent lines
  3. Water heating system
  4. Steam heating systems
  5. Underground gas lines
A
  1. Types K, L, and M
  2. Types DWV, K, L, and M
  3. Types K, L, and M
  4. Types K and L
  5. Type K- soft factory coated; Type L - soft factory coated; Type G
20
Q

What does the abbreviation S.P.S mean when applied to copper pipe?

A

S.P.S - Standard Pipe Size / Steel Pipe Size

21
Q

Copper tube is lighter that the same size steel pipe, but copper is heavier than steel. Explain.

A

Copper tube has a thinner wall thickness than steel pipe and copper has a grater relative density or specific gravity than steel.

22
Q

What is the coefficient of expansion for copper?

A

0.0000171/degrees Celsius

Or

0.0000095/ degrees Fahrenheit

23
Q

What is the chemical symbol for copper?

A

Cu

24
Q

Copper pipe is measured by its approximate _____ up to _____and by its actual ______for ______ and over

A

Copper pipe is measured by its approximate inside diameter up to 12” NPS and by its actual outside diameter for 14 “ and over.

25
Q

Copper tube is measured by its approximate

A

Inside diameter NPS

26
Q

Copper tubing is is measured by its actual

A

Outside diameter

27
Q

Can copper DWV be used for all above ground fixtures and drains? Explain.

A

No; the NPC in 2.2.7.4.3 states that “copper tube shall not be used for the fixture drain or the portion of the vent below the flood level rim of a flush valve-operated urinal”

28
Q

Copper tube used for drainage and venting can be joined by the following methods

A

Soldering

M. J coupling- furnco coupling

29
Q

Copper tube as used for above ground water lines can be joined by the following methods :

A

Soldering
Flared fittings
Compression fittings
Brazing

30
Q

Copper wrot fittings are considered better than cast brass fittings for soldering. Why?

A

Cast brass fittings may have pinholes or sand holes in their casting that do not show up upon installation or testing. Wrot copper fittings do not have the same chance of having these problems.

31
Q

Water lines connected to some plumbing fixtures utilize a flexible tube (speedy) connector. What type of seal is used on these?

What is the minimum diameter allowed?

What is the maximum length allowed?

A

Compression ferrule

1/4” ID

750 mm (30”) . Clause 2.6.3.4.3

32
Q

A Tylok fitting differs from a standard compression fitting. Explain the difference.

A

Tylok uses an additional ferrul

33
Q

What angle of flare is used in the piping trade?

A

45 degrees

34
Q

What does an adapter listed as 3/4” copper to 3/4” MIP indicate?

A

3/4” female cup solder joint to 3/4” male iron pipe connection

35
Q

List 3 methods of joining copper tube

A

Soldering
Flaring
Compression

36
Q

What are the maximum temperatures of substances that are conveyed in a soft soldered pipeline and maximum steam pressure?

A

Max temp - 121 C (250 F)

Pressure - 15 psig

37
Q

List 3 factors that would have direct effect on the maximum pressure that could be carried in a soft solder pipeline.

A

Temperature of fluid in the line

Size of the tube

Type of solder

38
Q

List the proper steps for making a good soldered joint

A 
Measure
Mark
Cut
Ream 
Clean tube and fitting
Flux tube and fitting 
Assemble and heat
Solder
Wipe clean
39
Q

Solder designated at 50/50 indicates

Solder designated at 95/5 indicates

A

50/50- solder with 50% tin and 50% lead

95/5 - solder with 95%tin and 5% antimony

40
Q

List 2 other names for mushy range

A

Plastic

Pasty

41
Q

State the meaning of a eutectic composition and wether this is a practical solder for making a soldered joint.

A

Eutectic Composition- those specific alloy compositions that melt at one temperature and not over a range. In this respect eutueic alloys behave like pure metals and are not practical for making soldered joints.

42
Q

State the liquid temperatures of

95-5
50-50
Tin
Lead
EnviroBrite 
Bridgit
A 
95-5 : 240 c (464f)
50-50 : 215 c (420f)
Tin : 230 c (450 f)
Lead : 327 c (620f)
EnviroBrite : 335c (635f)
Bridgit : 332c (630f)
43
Q

Why is it important to ream pipe ? What tools are used to ream copper pipe?

A

If pipe is not reamed, internal burrs can : restrict the bore of the tube, causing excessive pressure loss; cause turbulent flow in the pipe, which can result in a water hammer condition and cause local erosion of the tube; and catch foreign matter and create a stoppage in the tube.

44
Q

List 2 primary purposes in f fluxing

A

To prevent oxidation of metals being joined

To promote wetting of the Metal

45
Q

What is the purpose of a regulator on a soldering torch ?

A

To lower the tank pressure to the desired hose or working pressure

46
Q

List 3 different types of torches that are used for soldering

A

Acetylene
Propane
MAPP gas, butane, gasoline

47
Q

What are the components of red brass pipe and what method is used to join it?

A

Components- 85% tin and 15%zinc

Joined - threading

Block 1 (6 decks)

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