Seamless pipe's Wall thickness and theory weight
PIC-( Seamless pipe's Wall thickness and theory weight)
Wall thickness and Seamless pipe's theory weight

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Wall thickness and Seamless pipe's theory weight
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Carbon steel fluid pipe tolerance.
Type of steel tube | Steel tube size mm |
Deviation | ||
Ordinary grade | Senior | |||
Hot rolling (extrusion, expansion) tube | Outside diameterD | All | +1%(Minimum+0.50) | - |
Wall thicknessS | All | +15%(Minimum+0.45) -12.5%(Minimum-0.40) |
- | |
Cold drawing (rolling) tube | Outside diameterD | 6~10 | +0.20 | +0.15 |
>10~30 | +0.40 | +0.20 | ||
>30~50 | +0.45 | +0.30 | ||
>50 | +1% | +0.8% | ||
Wall thicknessS | ≤1 | +0.15 | +0.12 | |
>1~3 | +15% -10% |
+12.5% -10% |
||
>3 | +12.5% -10% |
+10% | ||
Note: the outer diameter is not less than 351mm of the thermal expansion tube, the wall thickness allows the deviation of +18% |
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