ASTM-A554 steel pipe: 1.Grade ... pipeItemsSquare tubes, round tubes, oval pipes, special shaped pipes,empaistic pipes, fittingsStandardASTM A554, A249 ... of stainless steel products, including stainless steel decorative pipes, industrial stainless welded pipes, special-shaped ... pipes and etc. Main materials are:304, 201,202,316,316L,430 and so on.ProductProduction LineWarehouse steel pipe ...