... EnergyTechniqueWelded,ERW Cold Rolled,Hot RolledSurfaceBared, Galvanized, Black Oiled,Or ... pipe surfaced with galvanized coating, polish, black painting and oiled . Since our establishment, we have always adhered to the business policy as "Quality ... steel pipe manufacturing group. We have cooperated with Bao steel, Wu yang steel, TPCO, Baotou steel, Shou gang Jin tang Steel, An gang Steel, Daye Steel ...