Stainless steel pipe: diameter from 3/8" to 40" steel grade : 201 202,304, 316, 316l, etc. Product Specifications ... ASTM A252and customers`special requirementsMaterialA,B,X42X70etc specification15*15300*300mmrectangular steel tube specification20*30400*200mmThickness0.513mmImplementation of standardsGB/T6725,GB/ ... `special requirementsMaterialQ235,Q345,ST37-2,ST52-3,S235,S355etc stainless steel pipe