Standard/size

External diameter （ mm)

thickness of wall （ mm ）

length （ mm ）

size

Allowance deviation

size

Allowance deviation

size

Allowance deviation

ASTM
A312

[10.29 ， 48.26]

+0.40/-0.80

+6/-0

(48.26,114.30]

+0.80/-0.80

(114.30,219.08]

+1.60/-0.80

(219.08,457.20]

+2.40/-0.80

ASTM
A213

D<25.4

+0.10/-0.10

D ≤ 38.1

+20%/-0

D<50.80

+3/-0

[25.4,38.1]

+0.15/-0.15

(38.1,50.8)

+0.20/-0.20

D>38.1

+22%/-0

D ≥ 50.8

+5/-0

[50.8,63.5)

+0.25/-0.25

[63.5,76.2)

+0.30/-0.30

[76.2,101.6]

+0.38/-0.38

(101.6,190.5]

+0.38/-0.64

(190.5,228.6]

+0.38/-1.14

ASTM
269

D<12.7

+0.13/-0.13

± 15%

+3.2/-0

(12.7,38.1]

± 10%

[38.1,88.9)

+0.25/-0.25

+4.8/-0

[88.9,139.7)

+0.38/-0.38

[139.7,203.2)

+0.76/-0.76

JIS
G3459

D<30

+0.30/-0.30

S<2

± 20

D ≥ 30

± 1%

S ≥ 2

± 10%

JIS
G3463

D<40

+0.25/-0.25

D<40;S<2

+0.40/-0

D ≤ 50;L≤7

+7/-0

[40,50)

D<50;L>7

It’s allowed to add 3mm, at most 15mm to the allowance deviation when the length increases per 3 meters or its remainders

[50,60)

[60,80)

+0.30/-0.30

D<40;S ≥ 2

+20%/-0

[80,100)

+0.40/-0.40

[100,120)

+0.40/-0.60

D>50;L ≤ 7

+10/-0

[120,160)

+0.40/-0.60

D ≥ 40

+22%/-0

D>50;L>7

The same as D<50;L ≥ 7m

[160,200)

+0.40/-0.60

D ≥ 200

+0.40/-1.60

DIN17456
DIN17458

D2

± 10%±0.5min

D ≤ 40;L≤1m

D≤40;L;(1-2)m

D≤40;L;(2-3)m

D≤40;L;(3-4)m
________________

D≤40;L;(4-8)m

D3

± 0.75%±0.3min

D4

± 0.5%±0.1min

40<D<168

L ≤ 6m

+5/-0

L>6m

+10/-0

ASTM A511 TABALE3

D<12.7

+0.13/-0.13

± 15%

+3.2/-0

[12.7,38.1)

± 10%

+4.8/-0

[38.1,88.9)

+0.25/-0.25

[88.9,139.7)

+0.38/-0.38

[139.7,203.2)

+0.76/-0.76

[203.2,219.8)

+1.14/-1.14

[219.8,323.85)

+1.57/-1.57

ASTM A511 TABALE4

D ≤ 76.2

+0.56/-0.58

S ≤ 2.77

± 16.5%

+4.76/-0

D ≤ 76.2

0.56/-0.58

S ≤ 2.77

± 16.5%

2.77<S ≤ 4.37

± 15%

4.37<S5.16

± 14%

S>5.16

± 12.5%

(76.2,139.7]

+0.79/-0.79

S ≤ 2.77

± 16.5%

2.77 S 4.37

± 15%

4.37<S5.16

± 14%

S>5.16

± 12.5%

(139.7,203.2]

+1.19/-1.19

4.37<S 5.16

± 14%

S>5.16

± 12.5%

公称直径

外径

Sch 5S

Sch 10S

Sch 10

Sch 20

Sch 30

SCH40S

Sch 40

Sch 60

SCH80S

Sch 80

Sch 100

Sch 120

Sch 140

Sch 160

XXS

DN

NPS

6

1/8"

10.3

1.24

1.73

2.41

8

1/4"

13.7

1.65

2.24

3.02

10

3/8"

17.1

1.65

2.31

3.20

15

1/2"

21.3

1.65

2.11

2.77

3.73

4.78

7.47

20

3/4"

26.7

1.65

2.11

2.87

3.91

5.56

7.82

25

1"

33.4

1.65

2.77

3.38

4.55

6.35

9.09

32

11/4"

42.2

1.65

2.77

3.65

4.85

6.35

9.70

40

11/2

48.3

1.65

2.77

3.68

5.08

7.14

10.15

50

2"

60.3

1.65

2.77

3.91

5.54

8.74

11.07

65

21/2"

73.0

2.11

3.05

5.16

7.01

9.53

14.02

80

3"

88.9

2.11

3.05

5.49

7.62

11.13

15.24

90

31/2"

101.6

2.11

3.05

5.74

8.08

100

4"

114.3

2.11

3.05

6.02

8.56

11.13

13.49

17.12

125

5"

141.3

2.77

3.40

6.55

9.53

12.70

15.88

19.5

150

6"

168.3

2.77

3.40

7.11

10.97

14.27

18.26

21.95

200

8"

219.1

2.77

3.76

6.35

7.04

8.18

10.31

12.70

15.09

18.26

20.62

23.01

22.23

250

10"

273.0

3.40

4.19

6.35

7.80

9.27

12.70

12.7

15.09

18.26

21.44

25.40

28.58

25.40

300

12"

323.8

3.96

4.57

6.35

8.38

9.35

10.31

14.27

12.7

17.48

21.44

25.40

28.58

33.32

25.40

350

14"

355.6

3.96

4.78

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

4.19

4.78

6.35

7.92

9.53

9.53

12.70

16.66

12.7

21.44

26.19

30.96

36.53

40.49

450

18"

457

4.19

4.78

6.35

7.92

11.13

9.53

14.27

19.05

12.7

23.83

29.36

34.93

39.67

45.24

500

20"

508

4.78

5.54

6.35

9.53

12.70

9.53

15.09

20.62

12.7

26.19

35.54

38.10

44.45

50.01

550

22"

559

4.78

5.54

6.35

9.53

12.70

9.53

22.23

12.7

28.58

34.93

41.28

47.63

53.98

600

24"

610

5.54

6.35

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

7.92

12.7

9.53

12.7

700

28"

711

7.92

12.7

15.88

9.53

12.7

750

30"

762

6.35

7092

7092

12.7

15.88

9.53

12.7

800

32"

813

7.92

12.7

15.88

9.35

17.48

12.7

850

34"

864

7.92

12.7

15.88

9.53

17.48

12.7

900

36"

914

7.92

12.7

15.88

9.53

19.05

12.7

950

38"

965

9.53

12.7

1000

40

1016

9.53

12.7

1050

42

1067

9.53

12.7

1100

44

1118

9.53

12.7