Size

Specification

Size

Permissible Variation

Size

Permissible Varition

Size

Permissible Varition

Normal

High

GB/T14975-2002

+0.3/-0.3

±0.02

S≤3

（+.-）14%

±12.5%S

L1

0-20

>30-50

+0.4/-0.4

±0.03

S>3

L2

0-10

（+.-）0.9%D

±0.8%D

L3

0-5

GB/T14976-2002

[6,10]

+0.2/-0.2

±0.15

(1.0,3)

±14%S

±12.5%S

L1

0-20

(10,30]

+0.3/-0.3

±0.20

S>3

L2

0-10

(30,50]

+0.4/-0.4

±0.30

≤38

(12%/-10%)S

±10%S

L3

0-5

D>50

（+.-）0.9%

±0.8%D

S>3

GB 13296-2007

6-30

+0.15/-0.2

±20%S

(30,50]

+0.30/-0.3

D≤38.1

(12%/-10%)

D>50

（+.-）0.75%

±22%S

ASTMA213

D<25.4

+0.1/-0.1

D>38.1

+20%/-0

+3/-0

[25.4,38.1]

+0.15/-0.15

(38.1,50.8)

+0.2/-0.2

[50.8,63.5)

+0.25/-0.25

S<2
S≥2

+22%/0

+5/-0

[63.5,76.2)

+0.3/-0.3

[76.2,101.6]

+0.38/-0.38

(101.6,190.5]

+0.38/-0.64

(190.5,228.6]

+0.38/-1.14

ASTMA269

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

ASTMA312

203.3-304.8

±1.01

10.29~73.03
+20%-12.5%
88.90~762.00
t/D≤5% +20%-12.5%
88.90~762.00 t/D≤5%
+15%-12.5%
>508.00
t/D Welded tube type all proportions
+17.5%-12.5

+6/-0

203.2-355.6

±1.26

[10.29,49.26]

+0.4/-0.8

(49.26,114.30]

+0.08/-0.8

(114.30,219.08]

+1.6/-0.8

(219.08,457.20]

+2.4/-0.8

(457.20,508.00,558.80,609.60]

+3.2/-0.8

(609.60,762.00]

±4.0/-0.80

JISG3459

D<30

+0.3/-0.3

（+.-）20

D≥30

+0.1/-0.1

（+.-）10%