Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Curtis' IPT's C of Q steamfitter study > Section Five Gasketed Joints > Flashcards

Section Five Gasketed Joints Flashcards

1
Q

What do flanges do?

A

Flanges connect piping and components together in a system by use of bolted connections.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Flanged connections create ease of what?

A

Dismantling and separation of piping, and equipment for repair and regular maintenance.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Weld neck flanges provide good service in what?

A

A wide range of temperature and pressure conditions in both static or intermittent flows.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What does a slip on flange allow when fitting?

A

Ease of positioning before welding.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

How should a slip on flange be welded (type of weld)?

A

With fillet welds.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

The inside weld on a slip on flange is accomplished how?

A

By pulling the pipe back approximately the wall thickness of the pipe from the end of the flange and welding the end of the pipe to the inside of the flange.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is another name for a lap joint flange?

A

Van stone flange.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is a lap joint flange?

A

Consists of both a stub end and a flange.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

When should a lap joint flange be used?

A

In conditions where non-alignment may cause problems.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Describe the material make up of a lap joint flange.

A

The flange itself may be made from less costly carbon steel. The stub end is made from the pipe material.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is a reducing flange and what is its advantage?

A

This flange changes the line size without adding an extra fitting.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

When should a reducing flange NOT be used?

A

The reducing flange changes the line size abruptly it is not recommended where flow disturbance or turbulent conditions will cause problems.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Socket weld flanges are joined to pipe the same way socket weld fittings are. It is used primarily on:

A

Small piping and low-pressure applications.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is a blind flange and it’s use?

A

Blind flange is a solid flange plate used to close off the end of pipe, fittings, valves, and/or equipment.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Spectacle blinds are similar to a blind flange. What is the advantage to a spectacle blind and how does it work?

A

Spectacle blinds have an open end and a closed end. Opposite ends can be used to stop flow or allow flow. The advantage is at a quick glance you know if the line is open or not.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

When are screwed/threaded flanges often used?

A

In situations where welding is not practical or desired it is mostly used in commercial application on low-pressure and small piping.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is an orifice flange and it’s purpose?

A

Orifice flanges are always used in pairs are used in conjunction with an orifice plate for measuring flow of liquids and gases within a piping system.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

How do you orifice flanges differ from other flanges?

A

They are pre-drilled with tapped holes made in the flange rims to accommodate metering piping.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Name four face types for flanges.

A

Raised face. Flat face. Lap joint. Ring joint.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Name two flange face finishes.

A

Smooth finish. Serrated finish.

A) serrated concentric grooves.
B) serrated spiral grooves.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Of all flange face types which one is the more common?

A

Raised face: used in the majority of flange applications for pressures up to 900 psi.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What does large male and female flange faces provide?

A

Ample gasket sealing area while still giving good gaskets support.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

The large tongue and groove gasket face provides what?

A

Good gasket compression under low bolt loading and excellent gasket containment under high-pressure service.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Describe the use of a flat face flange.

A

Used commonly on cast iron flanges and as mating flanges two pumps and valves and low pressure applications.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

What application would a ring joint flange face be used in?

A

Ideal for corrosive and high pressure/temperature applications.

26
Q

A lap joint flange has a similar face area design to that of the raised face flange but differs how?

A

The stub and makes up the sealing face.

27
Q

Small tongue and groove has the same usage as the large version but the smaller sealing face gives better what?

A

Gasket compression under low bolt loading.

28
Q

Small male and female: same general usage as the large version but gasket is contained in a smaller groove area giving better what ?

A

Retention and gasket compression.

29
Q

Threaded pipe and flange:

How does the sealing area of this flange face work?

A

By projecting one end of threaded pipe from one flange face into the recessed end of another threaded flange.

30
Q

Most standard steel and alloy flanges are covered under what agencies?

A

ASME/ANSI

31
Q

What other agency designates flange standards?

A

American petroleum Institute (API)

32
Q

Even though the dimensions of AMAE/ANSI and API flanges are similar, they should not be Interconnected because of:

A

Alternate pressure readings.

33
Q

Pipe flange gaskets are used to provide what?

A

Leak tight seal between two flange faces.

34
Q

Gaskets are generally available in the following three flange face types:

A

1) Full face gasket – covers full face or area of the flange.
2) Flat ring gasket – covers only the sealing area or raised face of the flange.
3) metallic ring gasket – designed to fit between the U-shaped machine grooves of ring type flanges.

35
Q

The metallic ring gasket is generally made from?

A

Soft iron or a softer grade of the same metal type as the joining flange.

36
Q

The metallic ring gasket is considered one of the best gasket types for?

A

Corrosive process, and high pressure and temperature service.

37
Q

When disassembling ring face flanges it should be remembered they can only be separated how?

A

Straight line pull directly opposite to each other.

38
Q

Full face and flat ring gaskets are designed for use with?

A

Flat face and raised face flanges respectively.

39
Q

Full face and flat ring gaskets: A variety of material can be used for each type of gasket depending on intended service, and gasket materials include:

A

Synthetic rubber. Asbestos composition. Teflon. Metals and various metal non-metal combinations.

40
Q

What are a synthetic rubber gaskets used for?

A

Low pressure and temperature water service.

41
Q

Asbestos compositions and Teflon gaskets are utilized for?

A

Intermittent pressure and temperature services.

42
Q

Flat gaskets: the flat gasket design uses both:

A

Metallic and non-metallic gasket material in it’s construction.

43
Q

The metallic material for flat gaskets includes:

A

Aluminum. Soft copper. Iron. Stainless steel.

44
Q

Non-metallic material for flat gaskets includes:

A

Compressed asbestos. Elastomers. Rubber. Teflon. Paper.

45
Q

Reinforced and multi-ply gaskets: wire or fabric insertions are used in reinforced gaskets to give better what?

A

Torque retention and blowout resistance to nonmetallic flat gaskets.

46
Q

What gaskets are normally used for moderate temperature and pressure service?

A

Corrugated metal gaskets.

47
Q

Spiral wound gaskets consist of what?

A

Spiral wound metal strips such as stainless steel, carbon steel or monel etc. with an Asbestos or other non-metal filler between the metal spiral’s

48
Q

What service are spiral wound gaskets used for? What flange types?

A

High temperature service on raised face and male and female flanges.

49
Q

Metal jacketed gasket. Describe this gasket design. Use of this gasket.

A

A filler material of asbestos or other nonmetal is wrapped in a metal jacket and is used for high temperature service. Can also use metal filler.

50
Q

Describe a serrated gasket and the flanges used for it.

A

Metal gaskets with V grooves machined into the face area to provide for multiple sealing surfaces with low bolt loading available in raised face, male and female, and tongue and groove, but are preferably used with smooth finished flanges.

51
Q

What service is the metal ring gasket used extensively in?

A

Oil and petro chemical industry and corrosive services where other gasket materials are not suitable.

52
Q

What two styles of metal ring gaskets are there?

A

Oval. Octagonal.

53
Q

Nonmetallic gaskets can be purchased either ready-made or in large material sheets that need to be cut to suit particular flange faces. Fabrication of gaskets from sheet material is usually accomplished by either:

A

1) trace and tap method.

2) Lay out and cut method.

54
Q

Describe the trace and tap method of flange fabrication.

A

Material seat is placed over the flange and traced, a soft face hammer is then used to lightly tap the gasket material around the OD and ID edges of the flange bolt holes are formed in the gasket material by using the peen end of a ball peen hammer.

55
Q

When is the trace and tap method of gasket fabrication not preferable?

A

If the material is too thick or resilient.

56
Q

Layout and cut method. The needed pattern for a gasket can be laid out directly on the material sheet by use of what?

A

Compass, divider or gasket cutter.

57
Q

Lay out and cut method for gasket manufacture: the bolt hole layout can be done by two different methods what are they?

A

Angle or chord method.

58
Q

Another name for the angle method for bolt hole layout is called what?

A

Degree method.

59
Q

Describe the angle or degree method for bolt hole layout.

A

The angle method uses degrees to divide the bolt hole circle into equal parts. Dividing 360° by the number of bolt holes in the flange.

60
Q

There are two basic types of bolts used in making flange connections what are they?

A

A machine bolt that uses one nut and the more commonly used stud bolt which uses two nuts.

(Personal note) I don’t find the stud bolt to be the more common and I have used the Machined bolt almost exclusively.

61
Q

ASME/ANSI standard B 16.5 categorize ASTM flange bolting materials into the following four groups:

A

High strength bolting. Intermediate strength bolting. Low strength bolting. Nickel and special alloy bolting.

62
Q

How should flanges be bolted together?

A

Align the flange faces and gasket. The bolts should be hand tight to start and then begin tightening the bolts in a tire pattern. Once all the bolts are tight go around the flange a couple of times in sequential order.

Curtis' IPT's C of Q steamfitter study (9 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions