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seamless wrought steel pipe suppliers

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  • [Industry News] Cold-drawn thick-walled seamless steel tube manufacturing process

    The rolling method of cold drawn (rolled) thick-walled seamless steel pipe is more complicated than that of hot-rolled (extruded thick-walled seamless steel pipe). Large-caliber boiler tubes have a hollow section and their length is much longer than the diameter or circumference of steel.According t

  • [Industry News] Seamless steel pipe, its hot-dip galvanizing technology and the temperature of zinc liquid treatment

    The hot-dip galvanizing technology of seamless steel pipes can usually be divided into two types: dip plating and blow platingDip plating: direct water cooling after immersion plating, average thickness of zinc layer is more than 70 microns, galvanizing cost is high, zinc usage is large, used in nor

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