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A. Grade, Status, Specifications:
Grade | Supply Status | Technology | Outer Diameter (mm) | Wall Thickness (mm) |
Gr1 Gr2 Gr3 Gr4 Gr5 Gr9
|
Annealed (M) |
Seamless Cold-rolled Cold-drawn | >10~15 | 0.5~2.5 |
>15~20 | 0.6~3.0 | |||
>20~30 | 0.6~3.5 | |||
>30~40 | 1.0~4.0 | |||
>40~50 | 1.5~4.5 | |||
>50~60 | 2.0~4.5 | |||
>60~80 | 2.0~4.5 | |||
>80~114 | 2.0~4.5 | |||
Welding | >133 | 0.5~10 |
B. Tolerance:
C. Length
Type | Seamless tube | Welding tube | |||
Outer Diameter (mm) | Wall Thickness (mm) | ||||
<=15 | >15 | 0.5~1.25 | 1.25~2.0 | >2.0~2.5 | |
Length | 500~4000 | 500~9000 | 500~15000 | 500~15000 | 500~4000 |
