Common Threaded Fittings

Question 1

Answer 1

90-degree Elbow

• a 90-degree fitting used to change the angle or direction of the pipe run

Question 2

Answer 2

90-degree Reducing Elbow

• a 90-degree fitting, with two ends that differ in size, used to change the angle or direction of the pipe run

Question 3

Answer 3

90-degree Street Elbow

• a 90-degree pipe fitting where one end has male threads and the other end has female threads
• does away with the need for a nipple and works well in tight quarters

Question 4

Answer 4

45-degree Elbow

• a 45-degree fitting used to change the angle or direction of the pipe run

Question 5

Answer 5

Face Bushing

• a pipe fitting used to join two pipes of different sizes. A bushing is threaded inside and out where the larger diameter of the bushing fits inside of the larger pipe, and the smaller pipe is then inserted into the smaller end of the bushing
• sometimes called reducer bushings

Question 6

Answer 6

Hex Bushing

• threaded fittings that have male threads on the outside and female threads on the inside with a hex head used to tighten the fitting into the threaded opening
• used to reduce the size of female threads from a larger to a smaller diameter

Question 7

Answer 7

Tee

• also called triplet, three-way, and “T” pieces
• can be used to either combine or split a fluid flow

Question 8

Answer 8

Tee Reducing on a Branch

• a T-shaped pipe fitting with two outlets that cut at 90 degrees to the main line

The branch port size is smaller than the other ports of the run.

Question 9

Answer 9

Tee Reducing on the Run

• a T-shaped pipe fitting in which the side opposite to that with the largest size on the run of the body is smaller

Question 10

Answer 10

Cap

• usually liquid- or gas-tight, covers the otherwise open end of a pipe
• attaches to the exterior of a pipe
• has a female-threaded interior

Question 11

Answer 11

Plug

• a threaded pipe fitting with male threads; used to close the end of a ferrule or a pipe having female threads

Question 12

Answer 12

Concentric Reducer

(or Coupling Reducer)

• a fitting used to connect two pipes or tubes that have different inside diameters.
• both tubes need to share a common centerline or alignment in order to facilitate the flow of fluid or a substance.
• (also known as a tapered expansion joint)
• (also known as a bell reducer)

Question 13

Answer 13

Thread Protector

• used to protect the threads of a pipe during transportation and storage

Question 14

Answer 14

Steel Coupling

• a short length of steel pipe or tube with a socket at one or both ends that allows two pipes or tubes to be joined or welded

Question 15

Answer 15

Coupling (or Coupler)

• a short length of pipe or tube with female pipe threads at one or both ends that allows two pipes or tubes of equal or different sizes to be joined together
• help to extend or terminate pipe runs