Gaskets & Piping

Question 0

Blind

Answer 0

• solid forgings that are placed between the pipe flanges

- used in conjunction with gaskets to isolate a system

Question 1

Blank Blind

Answer 1

-installed in the suction and discharge lines of the pump while servicing

Question 2

Flange blinds

Answer 2

-one gasket

-

Question 3

Spectacle blind

Answer 3

• visual indicator that is a handle with a hole in it
• two gaskets
• stays in place when system is operational

Question 3

Volute blind

Answer 3

• Solid in construction
• seal the pump volute after you remove the pump body
• isolates the pump housing when the pump is removed

Question 5

Sniffer gas detectors

Answer 5

-bellow type pump and detector tubes that contain chemical reactants

Question 6

Pancake blind

Answer 6

-Visual indicator is shaped like a ping pong paddle

Question 7

Unconfined

Answer 7

-nothing to hold it in place

Question 8

Purging mediums

Answer 8

-nitrogen, carbon dioxide, steam, water and air

Question 9

Gasket Joint designs

Answer 9

• flat face (unconfined)
• raised (unconfined)
• tongue & groove (confined)
• male & female flange (semi confined)
• ring joint (self confined)

Question 10

Flat Faced unconfined

Answer 10

• most common and on cast iron flanges of pumps and valves
• also on the split lines of pumps, compressors, internal combustion engine joints
• allows them to float freely either towards or away from the fluid pressure under load

Question 11

Raised face unconfined

Answer 11

• on piping connections
• extremely high pressures
• where pressures range up to 900 psi
• they are marked with pipe size, pressure class and ring joint groove number
• pressure class is not psi

Question 12

Tongue and groove Confined

Answer 12

• no room for gasket to move
• good for high pressure applications
• they require closer tolerances

Question 13

Male & Female Semi confined

Answer 13

-confined on its 2 flat sides and on the outside edge

Question 14

Self confined ring joint

Answer 14

-have machined grooves machined into both flange faces

Question 15

Solid Metal rings

Answer 15

• compact seals and are adapted for high pressure, high temperature and corrosive conditions
• flanges have to be harder than the rings
• 3 common designs: delta seal, oval seal & octagonal seal
• to remove these you must pull straight out, opposite of the two flagne faces as they have specially designed grooves

Question 16

Gasket design

Answer 16

• Full face
• flat wing
• spiral wound
• metal jacketed
• solid metal ring gaskets

Question 17

Pipe construction

Answer 17

• Seamless up to 2” diameter

- spiral over 60” diameter

Question 18

Pipe sizing

Answer 18

• Measured ID
• schedule #10-160
• XXH is the strongest, stronger than 160
• schedule 40 is the most common