Standard: GB18248
Types:hot rolling,cold drawn
Usages:it is used to make gas cylinder tube.
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| Gas Cylinder Pipe | ||
| Type | OD allowed tolerance | WT allowed tolerance | 
|---|---|---|
| Hot rolling | ± 1.0 | +15/-10 | 
| Cold drawn | ± 0.75 | +12.5/-10 | 
Size of Gas Cylinder Pipe GB18248 series
| Outer Diameter | Wall Thickness | 
|---|---|
| 60 | 3.5 | 
| 70 | 3.5 | 
| 89 | 4.5 | 
| 108 | 4.0, 4.5, 5.0, 5.5, 6.0 | 
| 121 | 4.5 | 
| 127 | 4.5 , 7.5 | 
| 140(139.7) | 4.5, 5.0, 8.0 | 
| 159 | 5.0, 5.5 | 
| 165 | 5.0 | 
| 180 | 7.0, 8.0 | 
| 219 | 6.3, 6.5, 7.0 | 
| 229 | 6.3, 7.0 | 
| 232 | 6.0 | 
| 267 | 7.0 | 
| 273 | 7.5, 8.2, 9.0 | 

