1) low carbon steel pipe 2) OD 19.05-508mm WT: 1- ... Properties Test(Tensile Strength, Yield Strength, Elongation, Flaring, Flattening, Bending, Hardness, Impact Test), Surface and Dimension Test, No-destructive Test, Hydrostatic ... . 11) Surface treatment: Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting. low carbon steel pipe