ASTM-A554 steel pipe: 1.Grade:201,202,301,304,316L,etc 2.OD: ... nature, To the excellence. Namesteel pipeItemsSquare tubes, round tubes, oval pipes, special shaped pipes,empaistic pipes, fittingsStandardASTM A554, A249, A269 and A270Material ... welded pipes, special-shaped pipes and etc. Main materials are:304, 201,202,316,316L,430 and so on.ProductProduction LineWarehouse steel pipe