Seamless Pipes 1.Surface:bright and black 2.Material:201,304, ... to 32inchThickness: sch5 to schxxsSurfacePolished, annealed, pickledTechniqueCold drawn and cold rolledMaterialTP201,TP304,TP304L,TP316L,TP310S,TP321TypeSeamless and weldedEndPlain, ... 1/2inch to 32inchThickness: sch5 to schxxsSurfaceGalvanized or coatedTechniqueCold drawn, hot rolled, hot expansionTypeRound pipe and square pipeMaterial20 ...