... , medium-pressure and high-pressure industrial pipe fittings that are made of carbon steel ... to 32inchThickness: sch5 to schxxsSurfacePolished, annealed, pickledTechniqueCold drawn and cold rolledMaterialTP201, TP304, TP304L, TP316L, TP310S, TP321TypeSeamless ... : sch5 to schxxsSurfaceGalvanized or coatedTechniqueCold drawn, hot rolled, hot expansionTypeRound pipe and square pipeMaterial20#, 45#, Q235 ...