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Size

External diameter
(mm)
Wall thickness (mm)
Average
≤0.25~0.35
<0.35~0.50
<0.50~0.80
<0.80~1.20
<1.2~2.0
Φ4.0~Φ5
>Φ5~Φ10
>Φ12~Φ12.7
>Φ12.7~Φ30
The implementation of standards
Standard rate GB  JIS ASTM EN

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