welded steel pipe manufacture standard: JIS, GB,DIN,ASTM,EN,AISI welded tubes 201/202/304/430/409L/316L welded steel pipeManufacture Standard:JIS, GB, DIN, ASTM ... A554Usage: construction , industry materials and so on.High quality, competitive price and fast delivery.Packing: Every tube is sleeved in plastic ... several tubes are packed by weaving bag, which is seaworthy welded steel pipe