... -a554 From the nature, To the excellence. Namewelded tubeItemsSquare tubes, round tubes, oval pipes, special shaped pipes,empaistic pipes, fittingsStandardASTM A554, A249, A269 and ... products, including stainless steel decorative pipes, industrial stainless welded pipes, special-shaped pipes and etc. Main materials are:304, 201,202,316 ...