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| Steel tube's tolerances in dimensions |
Steel tube's tolerances are mainly specified by following international standards:
ASTM A 450, ASTM A 450M, ASTM A 530, ASTM A 269, EN-ISO 1127, DIN 28180.
ASTM A450 / A450M is most common used. Please refer to "Specification of ASTM 450 / A450M-96a" for a complete introduction.
| Specification |
Outside Diameter / Tolerance |
Tolerance of Wall thickness |
ASTM A 450 |
< 25.4mm |
< 38.1mm |
< 50.8mm |
> 50.8 mm |
-0/+20
(min. wall) |
| +/- 0.10mm |
+/-0.15mm |
+/-0.20mm |
+/-0.25mm |
|
ASTM A 530 |
< 48.3mm |
> 48.3mm |
|
|
+/-12.5% |
+0.4/-0.8mm |
+/-0.8mm |
|
|
|
ASTM A 269 |
< 38.1mm |
< 63.5mm |
|
|
+/-10% |
+/- 0.13mm |
+/-0.25mm |
|
|
EN-ISO 1127 |
TC D2 |
+/-1.00%min.+/-0.5mm |
T 2 +/-12.5% min.+/-0.40mm |
TC D3 |
+/-0.75%min.+/-0.3mm |
T3+/-10%min.+/-0.20mm |
TC D4 |
+/-0.50%min.+/-0.1mm |
T4+/-7.5%min.+/-0.15mm |
|
DIN 28180 |
|
16-20mm |
25mm |
30mm |
38mm |
<2mm/>2mm |
TC 1 |
+/-0.10mm |
0.12mm |
0.15mm |
0.20mm |
+/-0.2mm/+/-10% |
TC 2 |
0.30mm |
0.30mm |
0.30mm |
0.40mm |
+/-0.2mm/+/-10% |
TC 3 |
|
|
|
|
+/-0.2mm+15/-10% |
standard |
OD（mm) |
wt（mm） |
L（mm） |
SIZE |
tolerance |
size |
tolerance |
SIZE |
tolerance |
ASTM
A312 |
[10.29，48.26] |
+0.40/-0.80 |
10.3-73 |
88.9-457 T/D<5% |
88.9-457 T/D>5% |
>508 T/D<5% |
>508 T/D>5% |
|
| +20%- 12.5% |
| +22.5% 12.5% |
| +15%- 12.5% |
| +22.5%-12.5% |
| +15%，- 12.5% |
|
|
+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 |
every 3 meters in addition, deviation increase 3 mm, max. deviation is 15mm |
[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 |
sam with D<50;L≥7m
|
[160,200) |
+0.40/-0.60 |
D≥200 |
+0.40/-1.60 |
DIN17456
DIN17458 |
D2 |
±10%±0.5min |
|
±10% 0.2min |
| ±7.5% 0.15 min |
|
D≤40; L≤1m D≤40; L;(1-2)mD≤40; L; (2-3)m
D≤40; L; (3-4)m
D≤40; L; (4-8)m |
| +1/-0 |
| +2/-0 |
| +3/-0 |
| +4/-0 |
| +5/-0 |
|
D3 |
±0.75%±0.3min |
|
±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% |
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