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Crocodiles > Steel Pipe and Fittings > Flashcards

Steel Pipe and Fittings Flashcards

1
Q

What are the types of fittings?

A

Thread
Groove
Socket ( copper)
Welded ( socket or butt )

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2
Q

What is the most common fitting material and what is it prone too?

A

Cast, it’s prone to sand holes, distortion of the threads, poor internal seals

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3
Q

What fittings is typically not used in sprinklers and stretch’s?

A

Malleable fitting.

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4
Q

What type of fitting can not be re used ?

A

Malleable

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5
Q

What fittings are for high pressure installations?

A

Forged, generally schedule 80-160

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6
Q

What are the three kinds of 90’s?

A

Straight
Reducing
Street

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7
Q

What are the kinds of 45’s

A

Straight
Street

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8
Q

Different kinds of Tee’s

A

Straight tee (all same openings)
Reducing tee ( any open smaller )
Cross tee

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9
Q

Tees can be installed 2 ways, what are they

A

Bull headed
Tee on the run

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10
Q

What bushings are required on permanent installations

A

Face bushings

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11
Q

What bushings are made for temporary installations

A

Hex bushings

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12
Q

How many bushings are permitted on a cross tee

A

No more then 2

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13
Q

How many bushings are permitted on a straight Tee

A

1 bushing

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14
Q

Bushings should be avoided on which fittings

A

90’s

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15
Q

Extension fittings can only be used with what sprinkler heads

A

Sprinklers with a K factor of 8.0 or less

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16
Q

Extension fittings can only be used in which hazard settings

A

Light & ordinary hazard

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17
Q

How many extension fittings can be used and what’s the max length

A

Only 1 extension fitting can be used, no longer then 2 inches

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18
Q

What are unions used for

A

To join pipe from 2 different directions

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19
Q

What is the max size union

A

2 inches

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20
Q

What is a concentric reducer

A

Concentric reducer keeps the same centreline

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21
Q

What is an eccentric reducer

A

Eccentric reducer changes the centreline (flat bottom)

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22
Q

What are the 4 types of flange fittings

A

Tee
90
Reducer
Blank (Cap)

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23
Q

How do you calculate the the wrench size for a bolt

A

Multiply the bolt size by 1.5 OR with extra heavy bolts multiply 1.5 + 1/8

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24
Q

What are the different kinds of welded fittings

A

Pipe-o-let or thread-o-let
Weld-o-let
Groove-o-let

Only use approved fittings

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25
Q

What is a running thread

A

A thread past the length of the dye, loose non tapered thread used on pipe stands and water gong motors

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26
Q

What is a left handed thread and why is it used

A

It is opposite to a right handed thread, Used in place of a union

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27
Q

What flanges are used most often in fire protection

A

Split flange

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28
Q

Why is lubrication used with grooved couplings

A

To avoid pinching of rubbers

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29
Q

What type of groove is approved on light wall pipe

A

Rolled groove

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30
Q

What is the outside diameter, number of bolts, and bolt diameter for a 2” Flange

A

Outside diameter: 6”
Number of bolts: 4
Bolt diameter: 5/8”

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31
Q

What is the outside diameter, number of bolts, and bolt diameter for a 4” Flange

A

Outside diameter: 9”
Number of bolts: 8
Bolt Diameter: 5/8”

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32
Q

What is the outside diameter, number of bolts, and bolt diameter for a 6” Flange

A

Outside diameter: 11”
Number of bolts: 8
Bolt Diameter: 3/4”

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33
Q

What is the outside diameter, number of bolts, and bolt diameter for a 8” Flange

A

Outside diameter: 13.5”
Number of bolts: 8
Bolt Diameter: 3/4”

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34
Q

Thread pitch is …

A

The number of threads per inch

35
Q

Thread angle is

A

Is the angle at which threads are cut at, 60 degrees

36
Q

Main grades of pipe are

A

Grade A
Grade B
Grade C

37
Q

Which grade of pipe is the least strong

A

Grade A

38
Q

What are the 3 main types of pipe and how are they constructed

A

Type F - Furnace butt weld
Type E - Electric resistance welded
Type S - seamless pipe

39
Q

Type F is used with what grade of pipe

A

Grade A

40
Q

Type E is used with what grade of pipe

A

Grade A&B

41
Q

Type S is used with what grade of pipe

A

Grade A&B

42
Q

What schedule pipe is considered light wall

A

5, 7, 10, 20, 30

43
Q

What is the considered the “standard” for steel schedules

A

Sch 40

44
Q

What schedule is extra strong and double extra strong

A

Sch 80 and Sch 160

45
Q

What is the most often used type of pipe

A

Carbon steel

46
Q

Galv. Pipe is ____ coated inside and out and considered ________

A

Zinc , non corrosive

47
Q

Stainless steel is used mostly in

A

Hydro or high pressure applications

48
Q

What is added to stainless steel pipe to slow corrosion

A

Nickel chromium

49
Q

What kind of pipe is brittle and poured into forms

A

Cast Iron

50
Q

What are the 4 kinds of pipe end finishes

A

Plain end - most common from suppliers

Bevel end - mostly Sch 40 and higher & for welding

Threaded - ends threaded w/ protector

Grooved - most common for pipe less then Sch 40

51
Q

What 6 things must be marked on the pipe

A

-manufactures name
-weight
-length
-grade
-schedule
-pressure

52
Q

What are the 2 types of groove

A

Roll groove & Cut groove

53
Q

What is the minimum schedule to cut groove up to 6” pipe

A

Schedule 40

54
Q

What groove is considered stronger

A

Roll groove

55
Q

4 methods of joining pipe steel are

A

Groove
Thread
Flange
Weld

56
Q

What is the schedule of 8” pipe that can be cut grooved

A

Sch. 30

57
Q

A pi tape can measure

A

Pipe diameter
Groove diameter
Flare diameter

58
Q

Thread engagement is

A

The amount of pipe thread necessary to make a tight connection between pipe & fittings

59
Q

Proper threads will normally leave how many threads after being made in

A

2 imperfect threads

60
Q

How can flanges be fastened

A

Screwed, welded, or grooved

61
Q

Different kinds of flange gaskets

A

Full face
Flat ring
Metallic ring

62
Q

Per NFPA 13, what schedule of pipe can be bent

A

Schedule 10 and up
Copper tubing K&L

63
Q

Schedule 40 pipe 2” or less must have a bend radius of ___ pipe diameters

A

6

64
Q

Schedule 40 pipe 2 1/2” or larger must have a bend radius of ___ pipe diameters

A

5

65
Q

Any other schedule pipe must have a bend radius of ___ pipe diameters

A

12

66
Q

What is bend radius

A

Min. radius at which a pipe can be bent without causing kinks

67
Q

Formula for bend radius

A

BR= number of pipe diameters x pipe diameter

Ex. 4” Sch 40 pipe

BR= 5x4 =20”

68
Q

Why are face bushings preferred

A

They are less restrictive

69
Q

What is the min. Sch. Pipe that can be roll grooves

A

Sch. 10

70
Q

What end prep is most common for welded pipe?

A

Beveled

71
Q

What is the pitch for 1 - 2” pipe

A

11 1/2

72
Q

What size pipe can be threaded using the same die chasers

A

1/4-3/8
1/2-3/4
1-2”
2 1/2-4”

73
Q

What is the most common fitting material in sprinklers ?

A

Cast

74
Q

What are grooved fittings made from ?

A

Ductile

75
Q

What reducer is used on a fire pump supply?

A

eccentric

76
Q

What angle are the north lines on an isometric drawing?

A

30 degrees

77
Q

What 2 drawings are used to create an isometric drawing ?

A

Plan and elevation

78
Q

When shall face bushings be used ?

A

Where a one piece tee is not available

79
Q

Which type of gasket face has openings for bolts ?

A

Flat face

80
Q

Grooved couplings are colour coded for

A

Temperature and service conditions

81
Q

Cast iron fittings come in both black and galv, true or false

A

False, cast iron fittings only come in black

82
Q

What is added to cast iron to make ductile fitting?

A

Magnesium

83
Q

All pipe over ____ must have proper labeling on it

A

2 feet

84
Q

Malleable fittings are available in _____

A

Black & Galv.

Crocodiles (8 decks)

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