... , B), A333, A369 Standard of Welded Square Pipe: BS, ASTM, DIN, JIS, ASME O. D of Welded Square Pipe: 10mm*10mm~600mm*600mm W. T ... Section Shape: Suqare Product Type: Square tubes, ERW tubes, Welded steel pipe, Galvanized steel pipe etc.; Usage: Be widely used in furniture, building and construction ...