Q253 steel pipe 

big sized cold rolled-forming steel hollow section:

These products are widely used in steel structural,construction,mechanical manufacture,upholstery,petrochemical engineering and communications and transport,etc.

specifications:

Square tube:13*13--400*400MM, WT:0.4-16.0MM

Rec tube:20*10--500*300MM, WT:0.4--16.0mm

Round tube:Ø13-Ø76mm, WT:0.4-3.0MM