1.Spiral steel pipe 2.Material:Q195-Q345, API 5L Grade B, API 5L X42-X65 3.OD:219~3000mm 4.WT:6~30mm 5.5~12m Spiral steel pipe Product NameSpiral steel pipeStandardAPI 5L,DIN, GB/T9711.1-1997,SY/T5037-2000MaterialQ195,Q215,Q235,Q345, 16Mn, 10#,20#,45#,L245,L290,L360, API 5L Grade B, API 5L X42-X65,ST52 and so onOuter diameter219-3000mmWall thickness6-30mmLength5-12m,or according to the customers' ...