G.I PIPE SIZE GUIDE

CLASS

NOMINAL SIZE

OUTSIDE DIAMETER

WALL THICKNESS

MASS OF BLACKTUBE

NUMBER OF THREADS
PER INCH

BUNDLING

MAXIMUM

MINIMUM

PLAIN ENDS

THREADS & COUPLING

in

mm

in

mm

in

mm

in

mm

kg/m

kg/ft

lb/ft

kg/m

kg/ft

lb/ft

Pieces

LIGHT

0.5

15

0.843

21.4

0.827

21

0.079

2

0.947

0.289

0.636

0.956

0.291

0.642

14

91

0.75

20

1.059

26.9

1.039

26.4

0.091

2.3

1.38

0.421

0.927

1.39

0.424

0.934

14

91

1

25

1.331

33.8

1.307

33.2

0.102

2.6

1.98

0.603

1.331

2

0.61

1.344

11

91

1.25

32

1.673

42.5

1.65

41.9

0.102

2.6

2.54

0.774

1.707

2.57

0.783

1.727

11

44

1.5

40

1.906

48.4

1.882

47.8

0.114

2.9

3.23

0.984

2.171

3.27

0.997

2.198

11

44

2

50

2.37

60.2

2.346

59.6

0.114

2.9

4.08

1.244

2.742

4.15

1.265

2.789

11

44

2.5

65

2.992

76

2.961

75.2

0.126

3.2

5.71

1.74

3.837

5.83

1.777

3.918

11

19

3

80

3.492

88.7

3.461

87.9

0.126

3.2

6.72

2.048

4.516

6.89

2.1

4.63

11

19

4

100

4.484

113.9

4.449

113

0.142

3.6

9.75

2.972

6.552

10

3.048

6.721

11

10

MEDIUM

0.5

15

0.854

21.7

0.831

21.1

0.102

2.6

1.21

0.369

0.813

1.22

0.372

0.82

14

91

0.75

20

1.071

27.2

1.047

26.6

0.102

2.6

1.56

0.475

1.048

1.57

0.479

1.055

14

91

1

25

1.346

34.2

1.315

33.4

0.126

3.2

2.41

0.735

1.62

2.43

0.741

1.633

11

91

1.25

32

1.689

42.9

1.657

42.1

0.126

3.2

3.1

0.945

2.083

3.13

0.954

2.104

11

44

1.5

40

1.921

48.8

1.89

48

0.126

3.2

3.57

1.088

2.399

3.61

1.1

2.426

11

44

2

50

2.394

60.8

2.354

59.8

0.142

3.6

5.03

1.533

3.38

5.1

1.554

3.427

11

44

2.5

65

3.016

76.6

2.969

75.4

0.142

3.6

6.43

1.963

4.328

6.55

1.996

4.402

11

19

3

80

3.524

89.5

3.469

88.1

0.157

4

8.37

2.551

5.625

8.54

2.603

5.739

11

19

4

100

4.524

114.9

4.461

113.3

0.177

4.5

12.2

3.718

8.199

12.5

3.81

8.401

11

10

5

125

5.535

140.6

5.461

138.7

0.197

5

16.6

5.095

11.156

17.1

5.212

11.492

11

10

6

150

6.539

166.1

6.461

164.1

0.197

5

19.7

6.004

13.239

20.3

6.187

13.643

11

10

HEAVY

0.5

15

0.854

21.7

0.831

21.1

0.126

3.2

1.44

0.439

0.968

1.45

0.442

0.974

14

91

0.75

20

1.071

27.2

1.047

26.6

0.126

3.2

1.87

0.57

1.257

1.88

0.573

1.263

14

91

1

25

1.346

34.2

1.315

33.4

0.157

4

2.94

0.896

1.976

2.96

0.902

1.989

11

91

1.25

32

1.689

42.9

1.657

42.1

0.157

4

3.8

1.158

2.554

3.83

1.167

2.574

11

44

1.5

40

1.921

48.8

1.89

48

0.157

4

4.38

1.335

2.944

4.42

1.347

2.97

11

44

2

50

2.394

60.8

2.354

59.8

0.177

4.5

6.19

1.887

4.16

6.26

1.908

4.207

11

44

2.5

65

3.016

76.6

2.969

75.4

0.177

4.5

7.93

2.417

5.329

8.05

2.454

5.41

11

19

3

80

3.524

89.5

3.469

88.1

0.197

5

10.3

3.139

6.922

10.5

3.2

7.057

11

19

4

100

4.524

114.9

4.461

113.3

0.213

5.4

14.5

4.419

9.745

14.8

4.511

9.946

11

10

5

125

5.535

140.6

5.461

138.7

0.213

5.4

17.9

5.456

12.03

18.4

5.608

12.366

11

10

6

150

6.539

166.1

6.461

164.1

0.213

5.4

21.3

6.492

14.315

21.9

6.675

14.718

11

10