... steel pipe,seamless tube Type:round,square,rectangular Standard:ASTM,A554,A269 Grade:201,304,202,301,316,316L stainless steel pipes, seamless tube ... ,25x25,28x28,30x30,36x36,38x38,40x40,50x50,60x60,70x70,80x80 Rectangular pipes-Outside dimentions(mm)20x10,23x11,24x12,25x13,28x13,30x15 ...