our company owns three first-class cold formed steel production lines in world, which throughput amounts to 100,000tons per year with advanced equipments and fine production process. this production line takes hot rolling strips steel as raw materials and can produce all kinds of cold formed steel round tube,rectangle tube and square tube products of fine quality with production methods of cold curved forming and high-frequency welding, its products series include open sectional steel for general structure, cold forming sectional steel for especial structure, cold forming sectional steel for equipment .

The scope of specification,wall thickness and applicable standard of our products:
Square tube: 25X25X1mm---300X300X12.7mm
Rectangle tube:20X40X1mm---400X200X12.7mm
Round tube:25--377mm, 1-12.7mm
Applicable standard: GB/T6725-2002, EN10219-1997, EN10210, JIS466-8, ISO10799:2001, ASTM A500-03a, ASTM A53 , ASTM A252 , API 5L, DIN17118 1976

If you are interested in any items of them, pls feel free to contact me and I will offer you our best quotation, my e-mail zhanryong at yahoo dot com dot cn.