Spiral Welded Pipe 1) Material:Q235,Q345 2) Wall thickness:4mm--18mm 3) Out diameter:219--3220mm 4)ISO9001: ... inchPlace of OriginHebei, China (Mainland)Secondary Or NotNon-secondaryApplicationOil,Fluid,Boiler,Hydralic,Structure,Chemical--TechniqueHot RolledCertificationAPISurface TreatmentGalvanized, PaintingSpecial PipeThick Wall PipeAlloy Or NotNon ...