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About 96% of these are steel pipes, 3% are stainless steel pipes. A wide variety of annealed hollow section options are available to you, such as a53(a,b), q235, and 10#. ... high quality black annealing hollow section square rectangular steel pipe . US $600-650 / Ton ... Carbon Steel Ms Square Pipe | Gold Supplier Black Annealed Square Hollow ...

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EN10219 S235JR galvanized square tube and hollow section rectangular tube Square hollow sections or square tubes are cold formed and welded from either hot rolled, cold rolled, pre-galvanized or stainless steel. In order to form the square steel section the appropriate mother tube, a …

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Black Steel Tube, Steel Pipe, Seamless Pipe manufacturer / supplier in China, offering Square/Rectangular Steel Pipe/Tubes Hollow Section Galvanzied / Black Annealing, Sodium Sulfate Anhydrous Na2so4 99%Min Purity/Glauber Salt for Detergent Using, Sodium Hydroxide (NaOH 99%) and …

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Square hollow sections or square tubes are cold formed and welded from either hot rolled, cold rolled, pre-galvanized or stainless steel. In order to form the square steel section the appropriate mother tube, a round steel tube, has to be formed first.

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