API line pipe

Steel Pipe Specification

Steel Pipe Outside Diameter(D)

Steel Pipe Wall Thickness(S)

Pipe Body

Steel Pipe Outside Diameter (mm)

Allowable deviation (mm)

Steel Pipe Outside Diameter (mm)

Allowable Deviation (mm)

≥60.3andS＜20

±0.75％

≤73.0

+15%,-12.5%

≥60.3andS≥20

±1.00％

＞73.0andS＜20

+15%,-12.5%

＞73.0andS≥20

+17.5%,-10%

Standard

Grade

Tensile Strength (MPa)

Yield Strength (MPa)

Yield Strength
Ratio

Tensile Strength (%)

Ballistic Work
Akv(J)

Heat Treatment
State

API SPEC 5L

GB/T9711.2

B

≥415

245~440

≤0.80

22

≥40

normalizing

X42

≥415

290~440

≤0.80

21

≥40

normalizing

X52

≥460

360~510

≤0.85

20

≥40

normalizing

X60

≥520

415~565

≤0.85

18

≥40

normalizing

X65

≥535

450~570

≤0.90

18

≥40

quencher backfire

X70

≥570

485~605

≤0.90

18

≥40

quencher backfire

API LINE PIPE LIST

Size

Outside diameter

Wall thickness

Calculated mass

Plain end
Wpe

Threaded and coupled
ew

in

m

in

mm

lb/ft

kg/m

lb

kg

0.405”

0.405

10.3

0.068

1.7

0.24

0.36

0.20

0.09

0.540”

0.540

13.7

0.088

2.2

0.43

0.62

0.20

0.09

0.675”

0.675

17.1

0.091

2.3

0.57

0.84

0.20

0.09

0.840”

0.840

21.3

0.109

2.8

0.85

1.28

0.20

0.09

1.050”

1.050

26.7

0.113

2.9

1.13

1.70

0.20

0.09

1.315”

1.315

33.4

0.133

3.4

1.68

2.52

0.20

0.09

1.660”

1.660

42.2

0.140

3.6

2.27

3.43

0.60

0.27

1.900”

1.900

48.3

0.145

3.7

2.72

4.07

0.40

0.18

2 3/8”

2.375

60.3

0.154

3.9

3.66

5.42

1.20

0.54

2 7/8”

2.875

73.0

0.203

5.2

5.80

8.69

1.80

0.82

3 1/2”

3.500

88.9

0.216

5.5

7.58

11.31

1.80

0.82

4”

4.000

101.6

0.226

5.7

9.12

13.48

3.20

1.45

4 1/2”

4.500

114.3

0.237

6.0

10.80

16.02

4.40

2.00

5 9/16”

5.563

141.3

0.258

6.6

14.63

21.92

5.60

2.54

6 5/8”

6.625

168.3

0.280

7.1

18.99

28.22

7.20

3.27

8 5/8”

8.625

219.1

0.277

7.0

24.72

36.61

14.80

6.72

8 5/8”

8.625

219.1

0.322

8.2

28.58

42.65

14.00

6.36

10 3/4”

10.750

273.1

0.279

7.1

31.23

46.57

20.00

9.08

10 3/4”

10.750

273.1

0.307

7.8

34.27

51.03

19.20

8.72

10 3/4”

10.750

273.1

0.365

9.3

40.52

60.50

17.40

7.90

12 3/4”

12.750

323.9

0.330

8.4

43.81

65.35

32.60

14.80

12 3/4”

12.750

323.9

0.375

9.5

49.61

73.65

30.80

13.98

14”

14

355.6

0.375

9.5

54.62

81.08

24.60

11.17

16”

16

406.4

0.375

9.5

62.64

92.98

30.00

13.62

18”

18

457.0

0.375

9.5

70.65

104.84

35.60

16.16

20”

20

508.0

0.375

9.5

78.67

116.78

42.00

19.07