Joining and Installation of Threaded Pipe and Flanged Fittings

Question 1

What are the 2 common class ratings for steel flanged fittings?

Answer 1

150 and 300 LBS

Question 2

What is the maximum allowable pressure for the 2 common steel flange class ratings (150,300)?

Answer 2

285 and 740 PSI

Question 3

What class are cast iron fitting?

Answer 3

125 LBS

Question 4

What are the four types of flanged fitting connections ?

Answer 4

• Welded
• Screwed / Threaded
• Socket Welded
• Lap Joint

Question 5

What are the 2 main purposes that gaskets serve?

Answer 5

1. Sealing for leak prevention
2. Isolation of 2 sections of pipes being joined

Question 6

Gasket sizes are determined by the inside or outside diameter of the flanged fitting?

Answer 6

Inside

Question 7

What are the ratings for full face gaskets ?

Answer 7

• 125 - 150 LBS
• 300 LBS
• 600 LBS

Question 8

To select the proper full face ring gasket, determine the _________ size and the gas ________. Then refer to Eversource Material standards for flanged fittings

Answer 8

Flange / Pipeline

Question 9

Should bolts have fine or coarse threads?

Answer 9

Coarse

Question 10

How many threads must extend beyond the nut when tightening?

Answer 10

One Full thread

Question 11

A bolt’s _______ must be in accordance with company standards.

Answer 11

Grade of steel

Question 12

Bolts are tightened in what pattern?

Answer 12

Star pattern

Question 13

Bolts are tightened with a calibrated torque wrench using what method?

Answer 13

In thirds 1/3
ei. 100lbs
- 33 , 66 , 99 LBS , then one full clockwise rotation

Question 14

What bolts are used to hold the gasket in place ?

Answer 14

The 2 bottom bolts / diametrically opposed

Question 15

What are some AOC’S

Answer 15

• Escaping or blowing gas
• Wall thickness irregularity
• Unexpected pipe type, size, or pressure
• Pipeline damage

Question 16

Painting the pipe and other fittings prevents what ?

Answer 16

Corrosion

Question 17

Flanged fittings are found in both _____ and _______ installations.

Answer 17

Above / Below Ground

Question 18

Stress produced in a pipe wall by pressure of gas in a pipe is called what ?

Answer 18

Hoop Stress

Question 19

Always select the correct size pipe and fitting from the ______ .

Answer 19

Schedule

Question 20

The disadvantages of flange joints is that the configuration is difficult to protect from what ?

Answer 20

Corrosion

Question 21

Cast iron fitting with a normal class of 125lbs normally have a ______ face.

Answer 21

Flat

Question 22

Fittings manufactured of other class ratings not of cast iron, normally have a ______ face.

Answer 22

Raised

Question 23

In some cases what type of flanges are used on meter sets?

Answer 23

Threaded / screwed flanges

Question 24

What type of flanges are used when they must be smaller than 2”?

Answer 24

Socket welded

Question 25

What type of flanges are exclusively used on meter sets?

Answer 25

Lap joint

Question 26

Flanged fittings difficult to separate may require the use a flange __________ to pry them apart.

Answer 26

Separator

Question 27

Black pipe is also referred to as what?

Answer 27

- Black steel pipe - Wrought iron pipe

Question 28

Only join pipe of the same ______ and ______.

Answer 28

Schedule and Grade

Question 29

A ______ provides a 90 Deg bend with 2 female openings.

Answer 29

Elbow

Question 30

A _______ has 2 male threaded ends, and is used between fittings that are closely spaced.

Answer 30

Nipple

Question 31

A ________ , sometimes referred to as service or street ells, consist of one female opening and one male thread.

Answer 31

Street Ell

Question 32

A ___________ provides a branch connection, consisting of 3 female openings all the same size.

Answer 32

Standard Tee

Question 33

A __________ provides a branch connection, consisting of 3 female openings, 2 of the same size, 1 on smaller diameter.

Answer 33

Reducing Tee

Question 34

A _________ provides a branch connection, consisting of 2 female openings and 1 male thread.

Answer 34

Street Tee

Question 35

A _________ of a tee consists of connecting one end opening of the tee to a fitting or a piece of pipe.

Answer 35

Running Connection

Question 36

A ________ of a tee means connecting a fitting or a piece of pipe in the side opening of the tee.

Answer 36

Bullhead Connection

Question 37

________ consist of 2 female openings, they are used to connect two male threads, they also come in reducing type, being able to connect 2 male threads of different sizes.

Answer 37

Coupling

Question 38

______ are used to close a tap in a fitting, it is recommended when possible to instead use a cap and a nipple due to their heads being able to break.

Answer 38

Plug

Question 39

_______ are used to reduce the size of an opening.

Answer 39

Bushings

Question 40

______ allows for a quick connection and disconnection of a pipeline.

Answer 40

Unions

Question 41

______ are used for repairs in the middle of long piping systems.

Answer 41

Unions

Question 42

The _______ of the fitting is where the pipe is inserted into the fitting.

Answer 42

Face

Question 43

The ______ is the part of the fitting in which the pipe is inserted into the fitting and tightened to appoint in which it is leak proof. Can also be known as the make-up.

Answer 43

Engagement

Question 44

The ________ is the distance from the end of the pipe to the center of the opening of the fitting.

Answer 44

Fitting allowance

Question 45

A standard thread is _______ shaped with an angle of ______ degrees.

Answer 45

V-shaped / 60

Question 46

The first 7 threads are ____________, sharp at the top and bottom.

Answer 46

Perfect Threads

Question 47

After the perfect threads, the next 2-3 are _______

Answer 47

Perfect at the bottom but not the top

Question 48

The remaining threads are called _______, they have no sealing value.

Answer 48

Starting threads

Question 49

What PPE is required during pipe work?

Answer 49

Gloves

Question 50

The distance a standard male thread will screw into the female thread is called what? Also known as the engagement.

Answer 50

Make-up

Question 51

Answer 51

90 Degree Elbow

Question 52

Answer 52

Nipple

Question 53

Answer 53

Street Elbow

Question 54

Answer 54

Standard T

Question 55

Answer 55

Reducing T

Question 56

Answer 56

Street T

Question 57

Answer 57

Insulating Union

Question 58

Answer 58

Standard Union