Piping And Pipe Fittings

Front 1

The ASME Code for pressure piping contains sections on piping requirements for:

Back 1

1.Power Piping
2.Industrial Gas and Air Piping
3.Refinery and Oil Piping
4.Refrigeration Piping Systems

Front 2

Two Ferrous materials commonly used in piping

Back 2

Steel and Cast Iron

Front 3

Two Non-Ferrous materials commonly used in piping

Back 3

Brass and Copper

Front 4

True or False:
Cast Iron is the most frequently used material for piping

Back 4

False

Front 5

Instrumentation and water services, where temperature is not a factor, make use of:

Back 5

Non-Ferrous materials such as copper and copper alloys

Front 6

What are 3 applications where Cast Iron might be used in a power plant

Back 6

1.Ash handling systems
2.Sewage lines
3.Underground water Line

Front 7

Commerical Pipe is made in standard sizes, Above 304.8mm (12 in), the size is given as the:

Back 7

Actual outside Diameter

Front 8

Schedule Numbers are used to indicate what in piping

Back 8

Wall Thickness

Front 9

What are 3 general methods used to join or connect lengths of pressure piping

Back 9

1.Threaded Pipe and Screwd Connections
2.Flanges
3.Welded Joints

Front 10

What Pipe Fitting is used to make angle turns in piping

Back 10

Elbow Fittings

Front 11

What fitting is used to make close connections; threaded on both ends with the close nipples threaded for its entire length

Back 11

Nipple Fittings

Front 12

What fitting is used for connecting two pieces of pipe of the same size in a straight line

Back 12

Coupling

Front 13

What fitting is used to provide an easy method for dismantling piping

Back 13

Unions

Front 14

What fitting is uses to make branch line connections at 90 Degrees

Back 14

Tees and Crosses

Front 15

What fitting is uses to make branch line connections at 45 degrees

Back 15

Y-Bend Fitting

Front 16

What fitting is uses to reverse the direction of a pipe run

Back 16

Return Bend

Front 17

What fitting is used to close off open pipe ends or fittings

Back 17

Plugs and Caps

Front 18

What fitting is used for connecting pipes of different sizes

Back 18

Bushings

Front 19

What fitting is used to reduce pipe size

Back 19

Reducers

Front 20

List 2 advantages of Screwed Connections

Back 20

1.Ease of assembly
2.Possibility of disassembly

Front 21

List 2 Disadvantages of Screwed Connections

Back 21

1.Connections subject to leakage
2.Strength of the pipe is reduced where threads are located in the pipe walls

Front 22

List 2 advantages of Flanged Connections

Back 22

1.Permit Disassembly
2.More Convienent to assemble and Disassemble then Screwed Connnections

Front 23

What is the Disadvantage of Flanged Connections

Back 23

They require Gaskets

Front 24

List the 5 advantages of Welded Connections

Back 24

1.Possibility of leakage is removed
2.Weight of the piping system is reduced
3.Cost of the materials and maintenance is reduced
4.looks neater and is easier to insulate
5.More flexibility

Front 25

What is the Main Disadvantage of Welded Connections

Back 25

Necessity of obtaining a Skilled Welder

Front 26

As a minimum, Piping fittings must conatin what identification

Back 26

1.Manufacturers Name or Trade Mark
2.Service Designation
3.Material Designation

Front 27

List 2 general methods used to accommodate expansion in piping

Back 27

1.Expansion Bends
2.Expansion Joints

Front 28

Name the two types of Expansion Joints

Back 28

1.Slip
2.Corrugated

Front 29

Explain the need for a bypass line with a globe valve in a typical piping layout for a steam trap

Back 29

To allow for inspection and isolation of the trap without service interuption

Front 30

List 3 possible causes of water hammer in a piping system

Back 30

1.When steam is introduced to a cold pipe
2.When flow in a steam pipe is very slow and normal cooling occurs
3.Steam is admitted to a pipe containing water or condensate

Front 31

State the purpose of insulating pipingg that carries substances at a lower temperature then that of the surrounding air

Back 31

the insulating material prevents the piping from sweating and constant dripping and corrosion

Front 32

List 5 desirable characteristics of an insulating material

Back 32

1.High insulating Value
2.Long Life
3.Vermin Proof
4.Non-Corrosive
5.Ability to retain its shape and insulating value when wet