ERW steel pipe
1.OD:219--406mm
2.Thickness:6-14mm
3.Material:Q235B/Q345B/L245/L290/L360/L415/L485/20#/API 5L.B/X42/X46/X52/X56/X60/X65/X70,etc.
4.Standard:GB3091-2001,GB9711.1,GB9711.2,API5L,API 5CT
5.Applying fields:offshore oil exploitation,vacuum distillation,three gorges,power station,west-east,chemical plant,etc.