Welded Spiral Steel Pipe 1.grade:Q235,Q345,10#,20#,16Mn,L245,X80 2.standards:API,GB/T 3.OD:219-3000mm thickness:6-25mm Welded Spiral Steel Pipe1. Material:Q235,Q345,10#,20#,16Mn,L245,L290,L360,X70,X80, 2. Standards:API Spec5L/5CT,GB/T9711.2-1999,GB/T9711.1-1997,EN10217,etc.. 3. Specification: Size:OD:219-3000mm thickness:6-25mm4. Length: 12m or as per request5. Application: For linepipe in ...