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Plumbing Theory 1 > Copper Pipe And Fittings > Flashcards

Copper Pipe And Fittings Flashcards

1
Q

What % copper is copper tube?

A

99.9 % pure copper

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2
Q

What 2 ways is copper tube produced?

A

Hard drawn - stiffer and stronger pipe

Soft Annealed - easily coiled and bent

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3
Q

What letter and color is used for water service, natural gas, oil, all underground applications?

A

K green/black

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4
Q

What color and marking is used for service, DWV, under ground and above ground : natural gas, oil?

A

L Blue

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5
Q

What color and marking is used for potable water above ground in buildings?

A

M Red

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6
Q

What color and marking is used for drains waste and vents above ground?

A

DWV yellow

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7
Q

What color and marking is used for natural gas above ground?

A

G black

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8
Q

What color and marking is used for hot water heating; low pressure (60 psi or lower)

A

H white

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9
Q

In what lengths is hard coper sold?

A

12’ or 20’

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10
Q

DWV is only available in what sizes?

A

1-1/4 “ - 6” diameter

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11
Q

Soft annealed copper is sold in rolls what lengths?

A

20’-60’

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12
Q

Soft annealed copper is sold in what diameters?

A

1/8” - 1-/12”

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13
Q

How do you size tubing?

A

By outside Diameter

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14
Q

How is piping sized?

A

Inside diameter

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15
Q

What is the wall thickness for 1-1/4” pipe type K?

A

.065 “

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16
Q

What is the wall thickness for 1-1/4” pipe type L?

A

.055”

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17
Q

What is the wall thickness for 1-1/4” pipe type DWV?

A

.04

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18
Q

What is the wall thickness for 1-1/4” pipe type H?

A

.036

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19
Q

Name advantages of copper pipe.

A
  1. Not easily breakable
  2. Withstands severe crushing loads
  3. High bursting strength
  4. Easily supported
  5. Impervious to rust
  6. Low frictional resistance to flow
  7. Soft copper can be easily bent
  8. Canadian copper institute guarantees pipe to last 50 years
20
Q

Name copper joining methods.

A
  1. Hard copper can be soldered
  2. Hard copper can be joined using sil-fos
  3. Soft copper can be joined using compression joints
  4. Flaring
  5. Mechanical joint fittings
  6. Swedged
21
Q

What is oxidization?

A

The corrosion of metals caused by oxygen

22
Q

What happens to copper with age?

A

Gets darker

23
Q

What does flux prevent

A

Prevents rapid oxidization when soldering

24
Q

What is the purpose of muriatic acid in active flux?

A

Helps to clean the joint and fitting.

25
Q

What is Sal Ammoniac used for?

A

Used as a flux for sil-fos and silver soldering

26
Q

What is non active flux made from?

A

Resin

27
Q

Name disadvantages of copper pipe.

A
  1. High initial cost
  2. Copper expands twice as much as iron or steel, but 6 times less than plastic pipe
  3. Copper takes on same temperature as liquid liquid inside, so it will cause condensation or expansion
28
Q

How is coper pipe cleaned?

A

Dipped in a chemical to remove oil and grit

Electrolysis will remove the remainder of impurities

29
Q

Soft solders are alloys of metals with melting points of less than _________

A

1000 degrees F

30
Q

50/50 is an alloy of what?

A

Tin/Lead

31
Q

What is 50/50 solder used in?

A

Drainage systems

32
Q

What is 62/38 solder referred to as?

A

Eutectic solder

33
Q

What is Eutectic solder?

A

62tin/38lead

Ha lowest possible melting point of all tin/lead solders

34
Q

What is 95/5 solder?

A

95%tin / 5% Antimony

35
Q

What is 95/5 solder used for?

A

Potable water applications

36
Q

How much lead is allowed to be used in solder for potable water systems?

A

0.2% or less

37
Q

What are silver solders used for

A

Temperatures over 1000 degrees F

38
Q

How is silver soldering referred to as?

A

Hard soldering
Silver - alloy brazing
Low temperature brazing

39
Q

How are silver solders applied?

A

With air and gas such as

Acetylene, butane, map has, natural gas

40
Q

What is an Oxyacetylene torch most commonly used for?

A

Higher temperatures
Where joints need to be stronger
Join copper to brass; copper - copper

41
Q

Name 2 types of hard solder joints

A
  1. Butt joints

2. Lap joints

42
Q

What will proper selection of flame tip ensure?

A

No waste of gas

43
Q

Tips are graded with numbers what is a number 1 tip used for?

A

Small pipe diameters

44
Q

Tips are graded with numbers what is a number 8 used for?

A

Larger pipe diameters

45
Q

What are rose bud tips used for?

A

Pipe 6”-12” diameters

Plumbing Theory 1 (5 decks)

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