The tolerance for spiral welded pipe productin including the tolerance of pipe body, the tolerance of pipe end and tolerance of wall thickness. Also, different steel pipe standard has different tolerance requirements during the production, for detailed data, please check the table below:
|
Standard |
Tolerance of Pipe Body |
Tolerance of Pipe End |
Tolerance of Wall Thickness |
|||
|
Out Diameter |
Tolerance |
Out Diameter |
Tolerance |
|||
|
GB/T3091 |
OD≤48.3mm |
≤±0.5 |
OD≤48.3mm |
- |
≤±10% |
|
|
48.3 |
≤±1.0% |
48.3 |
- | |||
|
273.1 |
≤±0.75% |
273.1 |
-0.8～+2.4 |
|||
|
OD>508mm |
≤±1.0% |
OD>508mm |
-0.8～+3.2 |
|||
|
GB/T9711.1 |
OD≤48.3mm |
-0.79～+0.41 |
- | - |
OD≤73 |
-12.5%～+20% |
|
60.3 |
≤±0.75% |
OD≤273.1mm |
-0.4～+1.59 |
88.9≤OD≤457 |
-12.5%～+15% |
|
|
508 |
≤±1.0% |
OD≥323.9 |
-0.79～+2.38 |
OD≥508 |
-10.0%～+17.5% |
|
|
OD>941mm |
≤±1.0% |
- | - |
- |
- | |
|
GB/T9711.2 |
60 |
±0.75%D～±3mm |
60 |
±0.5%D～±1.6mm |
4mm |
±12.5%T～±15.0%T |
|
610 |
±0.5%D～±4mm |
610 |
±0.5%D～±1.6mm |
WT≥25mm |
-3.00mm～+3.75mm |
|
|
OD>1430mm |
- |
OD>1430mm |
- | - |
-10.0%～+17.5% |
|
|
SY/T5037 |
OD<508mm |
≤±0.75% |
OD<508mm |
≤±0.75% |
OD<508mm |
≤±12.5% |
|
OD≥508mm |
≤±1.00% |
OD≥508mm |
≤±0.50% |
OD≥508mm |
≤±10.0% |
|
|
API 5L PSL1/PSL2 |
OD<60.3 |
-0.8mm～+0.4mm |
OD≤168.3 |
-0.4mm～+1.6mm |
WT≤5.0 |
≤±0.5 |
|
60.3≤OD≤168.3 |
≤±0.75% |
168.3 |
≤±1.6mm |
5.0 |
≤±0.1T |
|
|
168.3 |
≤±0.75% |
610 |
≤±1.6mm |
T≥15.0 |
≤±1.5 |
|
|
610 |
≤±4.0mm |
OD>1422 |
- |
- | - | |
|
OD>1422 |
- |
- |
- |
- | - | |
|
API 5CT |
OD<114.3 |
≤±0.79mm |
OD<114.3 |
≤±0.79mm |
≤-12.5% |
|
|
OD≥114.3 |
-0.5%～1.0% |
OD≥114.3 |
-0.5%～1.0% |
≤-12.5% |
||
|
ASTM A53 |
≤±1.0% |
≤±1.0% |
≤-12.5% |
|||
|
ASTM A252 |
≤±1.0% |
≤±1.0% |
≤-12.5% | |||