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Class 3000 Threaded Fittings

Views: 45     Author: Site Editor     Publish Time: 2022-07-05      Origin: Site

Threaded pipe fittings is one type of forged steel fittings which available in pressure rating of Class 2000, Class 3000 and Class 6000.

While 3000 lbs is the most common used among these ratings. It aslo can be marked as 3M where M means 1000.

There are many types can be provided as class 3000 pipe fittings, such as elbows (90 deg / 45 deg), tees, crosses, couplings (full/half), caps, unions, bushing, nipple. These fittings can be manufactured from carbon steel A105, SS A182 F304 / F316, nickel alloys and duplex stainless steel.The diameter range is 1/8" to  4".


Threaded Pipe Fittings VS Butt Welding Fittings


Butt welding is the most common type of connection and life is stronger than threaded. It also has large size range. But threaded is more convenient and can be used in some chemical environments that butt welding can't.


CLASS VS THICKNESS SCHEDULE


Different Types of Thread Connection


No

Type of Fittings

Connection

1

Full Coupling

Female x Female

2

90DEG/45DEG Elbow

Female x Female

3

3 Way Tee

Female x Female x Female

4

3 Piece Union

Female x Female

5

End Cap

Female

6

90DEG/45DEG Reducing Elbow

Female x Male

7

Hex Plug

Male

8

Hex Nipple

Male x Male

9

Hex Bushing

Female x Male

10

Half Coupling

Female


Class 3000 VS Class 6000


Description

3000 PSI (3M)

6000 PSI (6M)

Body Size

Smaller

Bigger

Thickness

Thinner

Thicker

Unit Weight

Lighter

Heavier

Working Pressure

Lower

Higher


Tolerance for Threaded Pipe Fittings


Tolerance for Threaded Pipe Fittings


British Standard Threads (BSPT)


NOMINAL BORE OF PIPE

APPROX.

OUTSIDE DIAMETER

NUMBER

OF THREADS  PER INCH

PITCH

DEPTH OF THREADS

DIAMETER AT GAUGE PLANE

LENGTH OF USEFUL THREAD

IMPERIAL

METRIC

A


P

h

B

E

1/8

6

10.16

28

0.907

0.581

9.72

6.5

1/4

8

13.66

19

1.337

0.856

13.15

9.7

3/8

10

17.17

19

1.337

0.856

16.66

10.1

1/2

15

21.51

14

1.814

1.162

20.95

13.2

3/4

20

27.00

14

2.309

1.162

26.44

14.5

1

25

33.93

11

2.309

1.479

33.24

16.8

1 1/4

32

42.59

11

2.309

1.479

41.91

19.1

1 1/2

40

48.48

11

2.309

1.479

47.80

19.1

2

50

60.47

11

2.309

1.479

59.61

23.4

2 1/2

65

76.09

11

2.309

1.479

75.18

26.7

3

80

88.87

11

2.309

1.479

87.88

29.8

4

100

114.14

11

2.309

1.479

113.03

35.8

5

125

139.65

11

2.309

1.479

138.43

40.1

6

150

165.12

11

2.309

1.479

163.83

40.1


American National Standard Taper Pipe Threads (NPT)


Nominal pipe

Outside Dia.Of Pipe

Threads per Inch

Pitch of Thread

Pitch Diameter at Begainning of Extranal Thread

Handtight Engagement

Effective Thread,External






Length,aL1

Dia,bE1

Length,cL2

Dia,E2

Size

D

N

P

E0

Inch


inch


1/16

0.3125

27

0.03704

0.27118

0.160

0.28118

0.2611

0.28750

1/8

0.405

27

0.03704

0.36351

0.1615

0.37360

0.2639

0.38000

1/4

0.540

18

0.05556

0.47739

0.2278

0.49163

0.4018

0.50250

3/8

0.675

18

0.05556

0.61201

0.240

0.62701

0.4078

0.63750

1/2

0.840

14

0.07143

0.75843

0.320

0.77843

0.5337

0.79179

3/4

1.050

14

0.07143

0.96768

0.339

0.98887

0.5457

1.00179

1

1.315

11.5

0.08696

1.21363

0.400

1.23863

0.6828

1.25630

1 1/4

1.660

11.5

0.08696

1.55713

0.420

1.58338

0.7068

1.60130

1 1/2

1.900

11.5

0.08696

1.79609

0.420

1.82234

0.7235

1.84130

2

2.375

11.5

0.08696

2.26902

0.436

2.29627

0.7565

2.31630

2 1/2

2.875

8

0.12500

2.71953

0.682

2.76216

1.1375

2.79062

3

3.500

8

0.12500

3.34062

0.766

3.38850

1.2000

3.41562

3 1/2

4.000

8

0.12500

3.83750

0.821

3.88881

1.2500

3.91562

4

4.500

8

0.12500

4.33438

0.844

4.38712

1.3600

4.41562

5

5.563

8

0.12500

5.39073

0.937

5.44929

1.4063

5.47862

6

6.625

8

0.12500

6.44609

0.958

6.50597

1.5125

6.54062


Application


  • Paper Industry

  • Power Industry

  • Cement Industry 

  • Pipeline Industry

  • Chemical Industry

  • Oil and Gas Industry

  • Equipments Industry

  • Ship Building Industry

  • Food Processing Industry


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