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Seamless Pipe 5L ASTM A106 Gr. B A53 Gr. B 1020 St20 Carbon Alloy Steel Tube Sch40 Sch80 Std Black Painted End Plastic Capped Hot Formed Steel Tube, Find Details and Price about Carbon Steel Seamless Pipes Steel Pipes Astem 106 from Seamless Pipe 5L ASTM A106 Gr. B A53 Gr. B 1020 St20 Carbon Alloy Steel Tube Sch40 Sch80 Std Black Painted End Plastic Capped Hot Formed Steel Tube - Hebei Tianbo Industry and Trade Co., Ltd.