Gaskets And Piping

Question 0

What are the four types of flanges?

Answer 0

Flange blind. Pancake style, spectacle style, volute style.

Question 1

What are blinds?

Answer 1

Slim disks that you place between pipe flanges

Question 2

How many gaskets are used with a spectacle blind?

Answer 2

Two, one for each side

Question 3

Which blind has a visual indicator?

Answer 3

Spectacle blind. When there is a hole at top, the blind is in place

Question 4

What must be done before installing blinds?

Answer 4

Ensure any energy devices such as accumulators or pulsation dampeners have been isolated or de pressurized

Question 5

How is permanent gas detection location determined?

Answer 5

If gas is heavier than air, the sensor will be mounted low.

Question 6

What are the 5 types of gasket joints?

Answer 6

Flat face, raised face, tongue and groove, male and female, ring joint

Question 7

What things can affect the sealing ability of flat gaskets?

Answer 7

The thickness of the gasket, the bolt load pressure it has to withstand, and internal and hydrostatic and force

Question 8

What are the pressure ranges for a flange with the raised face of 1/16 and 1/4 inch?

Answer 8

One 16th is used for pressure classes up to 300 and above 300 uses the quarter inch raised face

Question 9

Describe tongue and groove confined gasket joints

Answer 9

The gasket has no freedom to move and is considered good for high-pressure applications

Question 10

What are the three solid metal ring gaskets?

Answer 10

Delta seal ring oval seal ring an octagonal seal ring. In the set ups the flanges must be harder than the rings

Question 11

What considerations are given when choosing the right gasket material?

Answer 11

The ability to withstand the bulk load without being crushed, the ability to withstand pressure and temperature extremes, fluid compatibility, compatibility with flange and joint design

Question 12

What are the common flange face design gaskets?

Answer 12

Full face, flat ring, spiral wound, metal jacket, solid metal ring

Question 13

How are flat ring and spiral wound gaskets installed

Answer 13

Only half the bolts must be removed and the remaining both can be loosened and then the gasket slides into the joint

Question 14

Describe metal jacket gaskets

Answer 14

They have a metallic jacket the covers a nonmetal internal filler. The filler is most commonly asbestos

Question 15

How should gaskets be stored?

Answer 15

Away from UV light and heat, moisture can distort gasket materials, gasket should not be hung as they can creep and distort

Question 16

On what is nominal pipe size based?

Answer 16

The inside diameter

Question 17

What are the limitations of tapered thread joints in piping

Answer 17

They are prone to leakage when vibration, pressure pulses, or thermal movement happens in the piping

Question 18

What is lightweight schedule 10 pipe used for?

Answer 18

It is used extensively in the sprinkler applications

Question 19

What must a gasket never do?

Answer 19

It must never restrict flow in anyway

Question 20

When using up our vice what should be used to denier the inside of the pipe

Answer 20

A straight Reamer. Do not use a spiral reamer in the power vice

Question 21

Why is alignment important in piping joints?

Answer 21

To avoid any stresses at the joint

Question 22

What are the advantages of soldering

Answer 22

There is less distortion of the parts being joined because he is required. Two different metals can be easily joined.