Detailed Product Description Sprial pipes1>Technique:welded2>Out diameter:&219-&20203>Wall thickness: 6-18mm,according to customers' requirement 4>Material: Q195-Q2355>Length:6-12m ,or as per client requirement6>Packaging terms: in bundles or as clients request7>Application: construction ;transportation for oil,natural gas, sewage and clear water;crude oil pipelines ,foundation piles , ...