Spiral Steel Pipe 1)Material:Q235,Q345,10#,20#,L290 2)Standards:API ... /T9711.2-1999 3)OD:219-3000mm thickness:6-25 Spiral Steel Pipe1)Material:Q235,Q345,10#,20#,16Mn,L245,L290 ... would give u the competitive price based on good quality!! Spiral Steel Pipe