... API,GB/T 3.OD:219-3000mm thickness:6-25mm Steel Spiral Welded Pipe 1. Material:Q235,Q345, ... etc.. 3. Specification: Size:OD:219-3000mm thickness:6-25mm4. Length: 12m or as per request5. Application: ... free to contact with us (sale7 at sino-steel.net), my name is Tina (86-15054285853), your ... inquiries will be highly appreciated!Spiral Steel Pipe1.grade:Q235,Q345,10#,20#,16Mn,L245,X802 ...