GB5310 Grade 12Cr1MoVG Boiler Tube
Specifications
For manufacture water wall panel, economizer, reheater, superheater and pipeline of boilers.Pipe Category |
Pipe Size mm |
Allowed Tolerances |
|||
Standard |
Higher |
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Hot Rolled |
OD |
≤ 159 |
± 1.0% (± 0.5mm ) |
± 0.75% (± 0.3mm ) |
|
> 159 |
± 1.0% |
± 0.90% |
|||
WT |
< 3.5 |
+ 15% (+ 0.48mm - 10% - 0.32mm ) |
± 10% (± 0.2mm ) |
||
3.5~20 |
+15% |
±10% |
|||
>20 |
D < 219 |
± 10% |
±7.5% |
||
D ≥ 219 |
+12.5% |
±10% |
|||
Cold Drawn |
OD |
≤ 30 |
± 0.20mm |
± 0.15mm |
|
> 30~50 |
± 0.30mm |
± 0.25mm |
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>50 |
±0.8% |
±0.6% |
|||
WT |
2~3 |
+12% |
±10% |
||
> 3 |
±10% |
±7.5% |
|||
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