We offer carbon steel pipe, alloy steel pipe, seamless steel tube, welded steel tube, spiral steel pipe, thickness pipe etc. 1)Product name: Spiral Welded Pipe2)Wall thickness:6mm-20mm out diameter: 219mm-3500mm3)Material:Q235B,Q345B(16Mn),10,20,L245,L290,L360,X804)Standard:SY/T5037-1999,GB/T9711-1999,API5L5)Use:mainly for petroleum, chemicals, natural gas, gas, water pipelines and electricity, ...