Copper Pipe And Fittings

Question 1

What % copper is copper tube?

Answer 1

99.9 % pure copper

Question 2

What 2 ways is copper tube produced?

Answer 2

Hard drawn - stiffer and stronger pipe

Soft Annealed - easily coiled and bent

Question 3

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

Answer 3

K green/black

Question 4

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

Answer 4

L Blue

Question 5

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

Answer 5

M Red

Question 6

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

Answer 6

DWV yellow

Question 7

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

Answer 7

G black

Question 8

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

Answer 8

H white

Question 9

In what lengths is hard coper sold?

Answer 9

12’ or 20’

Question 10

DWV is only available in what sizes?

Answer 10

1-1/4 “ - 6” diameter

Question 11

Soft annealed copper is sold in rolls what lengths?

Answer 11

20’-60’

Question 12

Soft annealed copper is sold in what diameters?

Answer 12

1/8” - 1-/12”

Question 13

How do you size tubing?

Answer 13

By outside Diameter

Question 14

How is piping sized?

Answer 14

Inside diameter

Question 15

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

Answer 15

.065 “

Question 16

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

Answer 16

.055”

Question 17

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

Answer 17

.04

Question 18

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

Answer 18

.036

Question 19

Name advantages of copper pipe.

Answer 19

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

Question 20

Name copper joining methods.

Answer 20

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

Question 21

What is oxidization?

Answer 21

The corrosion of metals caused by oxygen

Question 22

What happens to copper with age?

Answer 22

Gets darker

Question 23

What does flux prevent

Answer 23

Prevents rapid oxidization when soldering

Question 24

What is the purpose of muriatic acid in active flux?

Answer 24

Helps to clean the joint and fitting.

Question 25

What is Sal Ammoniac used for?

Answer 25

Used as a flux for sil-fos and silver soldering

Question 26

What is non active flux made from?

Answer 26

Resin

Question 27

Name disadvantages of copper pipe.

Answer 27

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

Question 28

How is coper pipe cleaned?

Answer 28

Dipped in a chemical to remove oil and grit | Electrolysis will remove the remainder of impurities

Question 29

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

Answer 29

1000 degrees F

Question 30

50/50 is an alloy of what?

Answer 30

Tin/Lead

Question 31

What is 50/50 solder used in?

Answer 31

Drainage systems

Question 32

What is 62/38 solder referred to as?

Answer 32

Eutectic solder

Question 33

What is Eutectic solder?

Answer 33

62tin/38lead | Ha lowest possible melting point of all tin/lead solders

Question 34

What is 95/5 solder?

Answer 34

95%tin / 5% Antimony

Question 35

What is 95/5 solder used for?

Answer 35

Potable water applications

Question 36

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

Answer 36

0.2% or less

Question 37

What are silver solders used for

Answer 37

Temperatures over 1000 degrees F

Question 38

How is silver soldering referred to as?

Answer 38

Hard soldering Silver - alloy brazing Low temperature brazing

Question 39

How are silver solders applied?

Answer 39

With air and gas such as | Acetylene, butane, map has, natural gas

Question 40

What is an Oxyacetylene torch most commonly used for?

Answer 40

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

Question 41

Name 2 types of hard solder joints

Answer 41

1. Butt joints | 2. Lap joints

Question 42

What will proper selection of flame tip ensure?

Answer 42

No waste of gas

Question 43

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

Answer 43

Small pipe diameters

Question 44

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

Answer 44

Larger pipe diameters

Question 45

What are rose bud tips used for?

Answer 45

Pipe 6”-12” diameters