... , A369 3)OD:10mm*10mm~600mm*600mm --Welded Square Steel Pipe/Welded Square Steel Tube-- Material of Welded Square Pipe: 1) Q195, Q215, Q235, Q345; 10 ... , 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 of Welded Square Pipe: 0.6mm~25m Section Shape ...