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Sales Promotion CR pipe black annealed steel pipes and tubes
Sales Promotion China Manufacturer Square/Round,cold rolled steel pipe CR pipes,black pipe and tube, it is cold rolled pipes, also can be called black annealed steel pipes, the ductility usually good than hot rolled pipes, the hardness less usually 40-55, this not play good than hot rolled, it usually used on , Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose and so on .
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