... : 1.Grade:201,202,301,304,316L,etc 2.OD:9.53-254mm, ... .Standard:ASTM-a554 From the nature, To the excellence. Name 201 steel pipeItemsSquare tubes, round tubes, oval pipes, special shaped pipes ... pipes, special-shaped pipes and etc. Main materials are:304, 201,202,316,316L,430 and so on.ProductProduction LineWarehouse ...