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HS Code 7306 encompasses other tubes, pipes, and hollow profiles of iron or steel (not cast). The classification includes detailed subcategories for line pipe for oil/gas pipelines (7306.11-7306.19), casing/tubing for oil/gas drilling (7306.21-7306.29), and other welded or seamless pipes (7306.30-7306.90). This fundamental industrial category includes tubular steel products for fluid conveyance, structural applications, and mechanical components. Products range from precision mechanical tubing to large-diameter welded pipe for infrastructure projects. Manufacturing processes include various tube-forming methods (continuous welding, electric resistance welding, seamless piercing and rolling) followed by sizing, heat treatment, and finishing operations. Technical specifications focus on dimensional precision, mechanical properties, weld integrity, and surface condition. Unlike cast pipe (HS 7303), these products are manufactured from wrought steel, offering advantages in consistency, strength-to-weight ratio, and surface finish quality, supporting applications from automotive components to urban infrastructure.