Steel Pipe and Fittings Flashcards
What are the types of fittings?
Thread
Groove
Socket ( copper)
Welded ( socket or butt )
What is the most common fitting material and what is it prone too?
Cast, it’s prone to sand holes, distortion of the threads, poor internal seals
What fittings is typically not used in sprinklers and stretch’s?
Malleable fitting.
What type of fitting can not be re used ?
Malleable
What fittings are for high pressure installations?
Forged, generally schedule 80-160
What are the three kinds of 90’s?
Straight
Reducing
Street
What are the kinds of 45’s
Straight
Street
Different kinds of Tee’s
Straight tee (all same openings)
Reducing tee ( any open smaller )
Cross tee
Tees can be installed 2 ways, what are they
Bull headed
Tee on the run
What bushings are required on permanent installations
Face bushings
What bushings are made for temporary installations
Hex bushings
How many bushings are permitted on a cross tee
No more then 2
How many bushings are permitted on a straight Tee
1 bushing
Bushings should be avoided on which fittings
90’s
Extension fittings can only be used with what sprinkler heads
Sprinklers with a K factor of 8.0 or less
Extension fittings can only be used in which hazard settings
Light & ordinary hazard
How many extension fittings can be used and what’s the max length
Only 1 extension fitting can be used, no longer then 2 inches
What are unions used for
To join pipe from 2 different directions
What is the max size union
2 inches
What is a concentric reducer
Concentric reducer keeps the same centreline
What is an eccentric reducer
Eccentric reducer changes the centreline (flat bottom)
What are the 4 types of flange fittings
Tee
90
Reducer
Blank (Cap)
How do you calculate the the wrench size for a bolt
Multiply the bolt size by 1.5 OR with extra heavy bolts multiply 1.5 + 1/8
What are the different kinds of welded fittings
Pipe-o-let or thread-o-let
Weld-o-let
Groove-o-let
Only use approved fittings
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
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
What flanges are used most often in fire protection
Split flange
Why is lubrication used with grooved couplings
To avoid pinching of rubbers
What type of groove is approved on light wall pipe
Rolled groove
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”
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”
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”
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”
Thread pitch is …
The number of threads per inch
Thread angle is
Is the angle at which threads are cut at, 60 degrees
Main grades of pipe are
Grade A
Grade B
Grade C
Which grade of pipe is the least strong
Grade A
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
Type F is used with what grade of pipe
Grade A
Type E is used with what grade of pipe
Grade A&B
Type S is used with what grade of pipe
Grade A&B
What schedule pipe is considered light wall
5, 7, 10, 20, 30
What is the considered the “standard” for steel schedules
Sch 40
What schedule is extra strong and double extra strong
Sch 80 and Sch 160
What is the most often used type of pipe
Carbon steel
Galv. Pipe is ____ coated inside and out and considered ________
Zinc , non corrosive
Stainless steel is used mostly in
Hydro or high pressure applications
What is added to stainless steel pipe to slow corrosion
Nickel chromium
What kind of pipe is brittle and poured into forms
Cast Iron
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
What 6 things must be marked on the pipe
-manufactures name
-weight
-length
-grade
-schedule
-pressure
What are the 2 types of groove
Roll groove & Cut groove
What is the minimum schedule to cut groove up to 6” pipe
Schedule 40
What groove is considered stronger
Roll groove
4 methods of joining pipe steel are
Groove
Thread
Flange
Weld
What is the schedule of 8” pipe that can be cut grooved
Sch. 30
A pi tape can measure
Pipe diameter
Groove diameter
Flare diameter
Thread engagement is
The amount of pipe thread necessary to make a tight connection between pipe & fittings
Proper threads will normally leave how many threads after being made in
2 imperfect threads
How can flanges be fastened
Screwed, welded, or grooved
Different kinds of flange gaskets
Full face
Flat ring
Metallic ring
Per NFPA 13, what schedule of pipe can be bent
Schedule 10 and up
Copper tubing K&L
Schedule 40 pipe 2” or less must have a bend radius of ___ pipe diameters
6
Schedule 40 pipe 2 1/2” or larger must have a bend radius of ___ pipe diameters
5
Any other schedule pipe must have a bend radius of ___ pipe diameters
12
What is bend radius
Min. radius at which a pipe can be bent without causing kinks
Formula for bend radius
BR= number of pipe diameters x pipe diameter
Ex. 4” Sch 40 pipe
BR= 5x4 =20”
Why are face bushings preferred
They are less restrictive
What is the min. Sch. Pipe that can be roll grooved
Sch. 10
What end prep is most common for welded pipe?
Beveled
What is the pitch for 1 - 2” pipe
11 1/2
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”
What is the most common fitting material in sprinklers ?
Cast
What are grooved fittings made from ?
Ductile
What reducer is used on a fire pump supply?
eccentric
What angle are the north lines on an isometric drawing?
30 degrees
What 2 drawings are used to create an isometric drawing ?
Plan and elevation
When shall face bushings be used ?
Where a one piece tee is not available
Which type of gasket face has openings for bolts ?
Flat face
Grooved couplings are colour coded for
Temperature and service conditions
Cast iron fittings come in both black and galv, true or false
False, cast iron fittings only come in black
What is added to cast iron to make ductile fitting?
Magnesium
All pipe over ____ must have proper labeling on it
2 feet
Malleable fittings are available in _____
Black & Galv.
