1.Min. order : 25 MT per size ( one container) 2.According to China standard: SY/T5037-2000, GB/T9711. 1-1997 and API Spec 5L

1.Circle Pipe :(spec as follows)

(1)diameter:13~25.4   

   Size tolerance:0.10  

   Thickness:0.5~1.5

(2)diameter:18~25.4   

   Size tolerance:0.10

   Thickness:1.5~2.0

(3)diameter:25.4~34

   Size tolerance:0.10

   Thickness:0.7~2.0  

(4)diameter:34~50.8

   Size tolerance:0.12

   Thickness:0.8~3.0

(5)diameter:50.8~79.2    

   Size tolerance:0.12

   Thickness:1.0~3.0

2.Square Pipe :(spec as follows)

(1)diameter:16x16~25.4x25.4 

   Size tolerance:+/-0.15   

   Thickness:0.7~2.0

(2)diameter:30x30~50x50     

   Size tolerance: +/-0.20

   Thickness:1.0~3.0  

(3)diameter:60x60  

   Size tolerance: +/-0.15

   Thickness:0.7~2.0  

(4)diameter:100x100~200x200    

   Size tolerance: +/-0.60

   Thickness:3.0~6.0

3.Rectangle Pipe :(spec as follows)

(1)diameter:10x20~20x40     

   Size tolerance: +/-0.20  

   Thickness:0.8~1.5

(2)diameter:20x40~30x50  

   Size tolerance: +/-0.25

   Thickness:1.0~2.5

(3)diameter:25x70~38.1x76.2

   Size tolerance: +/-0.25

   Thickness:1.2~2.5  

(4)diameter:30x60~40x80  

   Size tolerance: +/-0.30

   Thickness:1.2~2.5  

(5)diameter:120x60~150x250  

   Size tolerance : +/-0.60 

   Thickness : 3.0~6.0

4.Ellipse Pipe :(spec as follows)

(1)diameter:10x20~20x40  

   Size tolerance : +/-0.20 

   Thickness : 0.8~1.5

(2)diameter:30x60~20x100

   Size tolerance : +/-0.30     

   Thickness : 1.2~2.5

Length Tolerance: +50mm