Threaded Pipe

Question 1

Bushing

Answer 1

Have internal and external thread. One male and one female. Connects a male to female pipe

Question 2

Reducer

Answer 2

Pipe fitting with 2 female threads. Connects a larger male to a smaller male pipe

Question 3

Elbows

Answer 3

Most common are 45s and 90s

Question 4

NPT

Answer 4

National pipe thread. 1/16 in taper per in

Question 5

Nipple

Answer 5

Anything 12in and under

Question 6

Tee

Answer 6

One side outlet 90 degrees to the run

Question 7

Union

Answer 7

Join two ends of pipe that can’t be turned or permits the future disconnection of pipes without cutting them.

Question 8

Wye

Answer 8

Fitting that has a side outlet of 45 degrees to the run

Question 9

Advantages of threaded pipe

Answer 9

No special fabrication, can use kettle threading equipment, safer cause needs no welding, and can clean the inside

Question 10

Disadvantages of threaded pipe

Answer 10

More prone to leaking, threading process reduces wall thickness, and can’t be used if erosion, extreme shock, or vibration is anticipated.

Question 11

Pipe schedules

Answer 11

STD- standard wall (40)
XS- extra strong wall (80-160)
XXS- double extra strong wall

Question 12

Pipe fittings

Answer 12

Elbows, offset, and return bends (90 & 45)
Branch connections (tee & wye)
Caps (male) plugs (female)

Question 13

Teflon tape

Answer 13

Can’t be used on anything that carries hot temps. Can be put on caustics and oxygen lines

Question 14

How many turns when putting on pipe

Answer 14

3-4 hand tight and 3 wrench. Should be 7 total

Question 15

Concentric

Answer 15

Fitting with the center line together with pipe

Question 16

Eccentric

Answer 16

Fitting where the centerline is offset

Question 17

City water pipe

Answer 17

Stainless, copper, and galvanized