NOMINAL  PIPE  SIZE

OD

(mm)

NOMINAL WALL THICKNESS

DN

NB(inch)

ASME

SCH10

SCH20

SCH30

STD

SCH40

SCH60

XS

SCH80

SCH100

SCH120

SCH140

SCH160

XXS

15

1/2"

21.3

2.11

2.41

2.77

2.77

3.73

3.73

4.78

7.47

20

3/4"

26.7

2.11

2.41

2.87

2.87

3.91

3.91

5.56

7.82

25

1"

33.4

2.77

2.9

3.38

3.38

4.55

4.55

6.35

9.09

32

1.1/4"

42.2

2.77

2.97

3.56

3.56

4.85

4.85

6.35

9.7

40

1.1/2"

48.3

2.77

3.18

3.68

3.68

5.08

5.08

7.14

10.15

50

2"

60.3

2.77

3.18

3.91

3.91

5.54

5.54

8.74

11.07

65

2.1/2"

73

3.05

4.78

5.16

5.16

7.01

7.01

9.53

14.02

80

3"

88.9

3.05

4.78

5.49

5.49

7.62

7.62

11.13

15.25

90

3.1/2"

101.6

3.05

4.78

5.74

5.74

8.08

8.08

100

4"

114.3

3.05

4.78

6.02

6.02

8.56

8.56

11.13

13.49

17.12

125

5"

141.3

3.4

6.55

6.55

9.53

9.53

12.7

15.88

19.05

150

6"

168.3

3.4

7.11

7.11

10.97

10.97

14.27

18.26

21.95

200

8"

219.1

3.76

6.35

7.04

8.18

8.18

10.31

12.7

12.7

15.09

18.26

20.62

23.01

22.23

250

10"

273

4.19

6.35

7.8

9.27

9.27

12.7

12.7

15.09

18.26

21.44

25.4

28.58

25.4

300

12"

323.8

4.57

6.35

8.38

9.53

10.31

14.27

12.7

17.48

21.44

25.4

28.58

33.32

25.4

350

14"

355.6

6.35

7.92

9.53

9.53

11.13

15.09

12.7

19.05

23.83

27.79

31.75

35.71

400

16"

406.4

6.35

7.92

9.53

9.53

12.7

16.66

12.7

21.44

26.19

30.96

36.53

40.19

450

18"

457.2

6.35

7.92

11.13

9.53

14.27

19.05

12.7

23.83

39.36

34.93

39.67

45.24

500

20"

508

6.35

9.53

12.7

9.53

15.09

20.62

12.7

26.19

32.54

38.1

44.45

50.01

550

22"

558.8

6.35

9.53

12.7

9.53

22.23

12.7

28.58

34.93

41.28

47.63

53.98

600

24"

609.6

6.35

9.53

14.27

9.53

17.48

24.61

12.7

30.96

38.89

46.02

52.37

59.54

650

26"

660.4

7.92

12.7

9.53

12.7

700

28"

711.2

7.92

12.7

15.88

9.53

12.7

750

30"

762

7.92

12.7

15.88

9.53

12.7

800

32"

812.8

7.92

12.7

15.88

9.53

17.48

12.7

850

34"

863.6

7.92

12.7

15.88

9.53

17.48

12.7

900

36"

914.4

7.92

12.7

15.88

9.53

19.05

12.7

Pipe types

Pipe sizes(mm)

Tolerances

Hot rolled

OD<50

±0.50mm

OD≥50

±1%

WT<4

±12.5%

WT 4～20

+15%, -12.5%

WT>20

±12.5%

Cold drawn

OD 6～10

±0.20mm

OD 10～30

±0.40mm

OD 30～50

±0.45

OD>50

±1%

WT≤1

±0.15mm

WT 1～3

+15%, -10%

WT >3

+12.5%, -10%

ASTM A53 Gr.B

Black and hot-dipped zinc-coated steel pipes welded and seamless

ASTM A106 Gr.B

Seamless carbon steel for high temperature service

ASTM SA179 

Seamless cold-drawn low-carbon steel heat exchanger and condenser tubes

ASTM SA192 

Seamless carbon steel boiler tubes for high pressure

ASTM SA210 

Seamless Medium-carbon boiler and superheater tubes

ASTM A213

Seamless alloy-steel boiler, superheater, and heat-exchanger tubes

ASTM A333 GR.6

seamless and welded carbon and alloy steel pipe intended for use at low temperatures.

ASTM A335 P9,P11,T22,T91

Seamless ferritic alloy-steel pipe for high-temperature service

ASTM A336 

Alloy steel forgings for pressure and high-temperature parts

ASTM SA519 4140/4130

Seamless carbon for mechanical tubing

API Spec 5CT J55/K55/N80/L80/P110/K55

Seamless steel pipe for casing

API Spec 5L PSL1/PSL2 Gr.b, X42/46/52/56/65/70

Seamless steel pipe for line pipe

DIN 17175

Seamless steel tube for elevated temperture

DN2391 

Cold drawn seamless prevision pipe

DIN 1629 

Seamless circular unalloyed steel tubes subject to special requirements

standard

Grade

Chemical Components (%)

Mechanical Properties

C

Si

Mn

P

S

Tensile STrength(Mpa)

Yield STrength(Mpa)

ASTM A53

A

≤0.25

-

≤0.95

≤0.05

≤0.06

≥330

≥205

B

≤0.30

-

≤1.2

≤0.05

≤0.06

≥415

≥240

ASTM A106

A

≤0.30

≥0.10

0.29-1.06

≤0.035

≤0.035

≥415

≥240

B

≤0.35

≥0.10

0.29-1.06

≤0.035

≤0.035

≥485

≥275

ASTM A179

A179

0.06-0.18

-

0.27-0.63

≤0.035

≤0.035

≥325

≥180

ASTM A192

A192

0.06-0.18

≤0.25

0.27-0.63

≤0.035

≤0.035

≥325

≥180

API 5L PSL1

A

0.22

-

0.9

0.03

0.03

≥331

≥207

B

0.28

-

1.2

0.03

0.03

≥414

≥241

X42

0.28

-

1.3

0.03

0.03

≥414

≥290

X46

0.28

-

1.4

0.03

0.03

≥434

≥317

X52

0.28

-

1.4

0.03

0.03

≥455

≥359

X56

0.28

-

1.4

0.03

0.03

≥490

≥386

X60

0.28

-

1.4

0.03

0.03

≥517

≥448

X65

0.28

-

1.4

0.03

0.03

≥531

≥448

X70

0.28

-

1.4

0.03

0.03

≥565

≥483

API 5L PSL2

B

0.24

-

1.2

0.025

0.015

≥414

≥241

X42

0.24

-

1.3

0.025

0.015

≥414

≥290

X46

0.24

-

1.4

0.025

0.015

≥434

≥317

X52

0.24

-

1.4

0.025

0.015

≥455

≥359

X56

0.24

-

1.4

0.025

0.015

≥490

≥386

X60

0.24

-

1.4

0.025

0.015

≥517

≥414

X65

0.24

-

1.4

0.025

0.015

≥531

≥448

X70

0.24

-

1.4

0.025

0.015

≥565

≥483

X80

0.24

-

1.4

0.025

0.015

≥621

≥552

Pipe types

Pipe sizes(mm)

Tolerances

Hot rolled

OD<50

±0.50mm

OD≥50

±1%

WT<4

±12.5%

WT 4～20

+15%, -12.5%

WT>20

±12.5%

Cold drawn

OD 6～10

±0.20mm

OD 10～30

±0.40mm

OD 30～50

±0.45

OD>50

±1%

WT≤1

±0.15mm

WT 1～3

+15%, -10%

WT >3

+12.5%, -10%

Types

Application

Structure Purposes

General structure and mechanical

Liquid Services

Petroleum, gas and other fluids conveying

Low and Medium Pressure Boiler Tube

Steam and boiler manufacturing

Hydraulic Pillar Service

Hydraulic support

Auto Semi-shaft Casing

Auto sem-shaft casing

Line Pipe

Oil and gas conveying

Tubing and Casing

Oil and gas conveying

Drill Pipes

Well drilling

Geological Drilling Pipe

Geological drilling

Furnace tubes, heat exchangers tubes

Furnace tubes, heat exchangers

Chilled water pipe

Steam/condensate pipe

Heat exchanger pipe

Marine/offshore pipe

Dredging pipe

Industrial pipe

Oil and gas pipe

Fire fighting pipe

Construction/structure pipe

Irrigation pipe

Drain/sewage pipe

Boiler tube