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Bas. > 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
What is a running thread
A thread past the length of the dye, loose non tapered thread used on pipe stands and water gong motors
26
What is a left handed thread and why is it used
It is opposite to a right handed thread, Used in place of a union
27
What flanges are used most often in fire protection
Split flange
28
Why is lubrication used with grooved couplings
To avoid pinching of rubbers
29
What type of groove is approved on light wall pipe
Rolled groove
30
What is the outside diameter, number of bolts, and bolt diameter for a 2” Flange
Outside diameter: 6” Number of bolts: 4 Bolt diameter: 5/8”
31
What is the outside diameter, number of bolts, and bolt diameter for a 4” Flange
Outside diameter: 9” Number of bolts: 8 Bolt Diameter: 5/8”
32
What is the outside diameter, number of bolts, and bolt diameter for a 6” Flange
Outside diameter: 11” Number of bolts: 8 Bolt Diameter: 3/4”
33
What is the outside diameter, number of bolts, and bolt diameter for a 8” Flange
Outside diameter: 13.5” Number of bolts: 8 Bolt Diameter: 3/4”
34
Thread pitch is …
The number of threads per inch
35
Thread angle is
Is the angle at which threads are cut at, 60 degrees
36
Main grades of pipe are
Grade A Grade B Grade C
37
Which grade of pipe is the least strong
Grade A
38
What are the 3 main types of pipe and how are they constructed
Type F - Furnace butt weld Type E - Electric resistance welded Type S - seamless pipe
39
Type F is used with what grade of pipe
Grade A
40
Type E is used with what grade of pipe
Grade A&B
41
Type S is used with what grade of pipe
Grade A&B
42
What schedule pipe is considered light wall
5, 7, 10, 20, 30
43
What is the considered the “standard” for steel schedules
Sch 40
44
What schedule is extra strong and double extra strong
Sch 80 and Sch 160
45
What is the most often used type of pipe
Carbon steel
46
Galv. Pipe is ____ coated inside and out and considered ________
Zinc , non corrosive
47
Stainless steel is used mostly in
Hydro or high pressure applications
48
What is added to stainless steel pipe to slow corrosion
Nickel chromium
49
What kind of pipe is brittle and poured into forms
Cast Iron
50
What are the 4 kinds of pipe end finishes
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
What 6 things must be marked on the pipe
-manufactures name -weight -length -grade -schedule -pressure
52
What are the 2 types of groove
Roll groove & Cut groove
53
What is the minimum schedule to cut groove up to 6” pipe
Schedule 40
54
What groove is considered stronger
Roll groove
55
4 methods of joining pipe steel are
Groove Thread Flange Weld
56
What is the schedule of 8” pipe that can be cut grooved
Sch. 30
57
A pi tape can measure
Pipe diameter Groove diameter Flare diameter
58
Thread engagement is
The amount of pipe thread necessary to make a tight connection between pipe & fittings
59
Proper threads will normally leave how many threads after being made in
2 imperfect threads
60
How can flanges be fastened
Screwed, welded, or grooved
61
Different kinds of flange gaskets
Full face Flat ring Metallic ring
62
Per NFPA 13, what schedule of pipe can be bent
Schedule 10 and up Copper tubing K&L
63
Schedule 40 pipe 2” or less must have a bend radius of ___ pipe diameters
6
64
Schedule 40 pipe 2 1/2” or larger must have a bend radius of ___ pipe diameters
5
65
Any other schedule pipe must have a bend radius of ___ pipe diameters
12
66
What is bend radius
Min. radius at which a pipe can be bent without causing kinks
67
Formula for bend radius
BR= number of pipe diameters x pipe diameter Ex. 4” Sch 40 pipe BR= 5x4 =20”
68
Why are face bushings preferred
They are less restrictive
69
What is the min. Sch. Pipe that can be roll grooved
Sch. 10
70
What end prep is most common for welded pipe?
Beveled
71
What is the pitch for 1 - 2” pipe
11 1/2
72
What size pipe can be threaded using the same die chasers
1/4-3/8 1/2-3/4 1-2” 2 1/2-4”
73
What is the most common fitting material in sprinklers ?
Cast
74
What are grooved fittings made from ?
Ductile
75
What reducer is used on a fire pump supply?
eccentric
76
What angle are the north lines on an isometric drawing?
30 degrees
77
What 2 drawings are used to create an isometric drawing ?
Plan and elevation
78
When shall face bushings be used ?
Where a one piece tee is not available
79
Which type of gasket face has openings for bolts ?
Flat face
80
Grooved couplings are colour coded for
Temperature and service conditions
81
Cast iron fittings come in both black and galv, true or false
False, cast iron fittings only come in black
82
What is added to cast iron to make ductile fitting?
Magnesium
83
All pipe over ____ must have proper labeling on it
2 feet
84
Malleable fittings are available in _____
Black & Galv.

Bas. (8 decks)

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