ASTM A252 Grade 3 welded steel pipe piles is an industrial steel pipe, A252 Gr.3 welded steel pipe piles suitable for oil and gas, water and gas, pulp pipeline. Also used in chemical industry, building structure and piling. The surface can be painted black paint, bare pipe, oil, hot dip galvanized, 3PE, to meet your needs, the yield strength of 310MPa or more, tensile strength above 455MPa.