Spiral Steel Pipe 1)Material:Q235,Q345,10#,20#,L290 2)Standards:API Spec5L/5CT,GB/T9711.2-1999 3)OD:219-3000mm ... ,10#,20#,16Mn,L245,L290,L360,X70,X80, 2)Standards:API Spec5L/5CT,GB/T9711.2-1999,GB/T9711.1-1997 ... u the competitive price based on good quality!! Spiral Steel Pipe