... large diameter welded steel pipes 1.OD: 10-426MM 2.WT: 0.6-30MM 3.Standard:ASTM GB BS DIN EN 4.Good quality, ... surface, and so on, all of those can be customized as per your requests. Commodity large diameter welded steel pipes GB ASTM ... 15-30 days after deposit Other productsgalvanized steel pipe,square/rectangular hollow section,seamless steel pipe, steel strip, steel coil, square bar,flat bar, egual ...