China Cangzhou Spiral Steel Pipe Co.,ltd established in 1994. We can produce spiral pipes comply with standards of SY/T5040-2000, SY/T5037-2000, GB/T9711.1-1997, and API 5L. Outside Diameter: 219 mm to 3200mm,  Pipe Thickness: 5mm to 26mm (0.236-0.708inch),Steel Grade:ASTM A252 Gr1,Gr2,Gr3, SS400, St37,St52,Q235B,Q345B, API GrA, GrB, X42, X46, X52, X56, X60, X65, X70. 
We have nine spiral pipe production lines, Our annual output is 300,000tons. We can also do many kind of coating of the pipe, such as : varnish coating, epoxy coating, FBE, 2PE(double-layer polyethylene), 3PE(three polyethylene),cement mortar lining. Standard:DIN30670, DIN30671, SY/T4013-2002, SY/T0315-97 standards.
Best regards
Zhangli Manager of Export  
cell: 15100375993   QQ: 741952741
email: greencloud55@gmail.com     zhangli.hello@163.com
MSN: zhangli.interesting@hotmail.com