Stainless Steel Pipe/Tube 1.Grade:304,304L,316,316L,321,317L,310S,904L and so on. 2.Standards: ... ,GB and so on Stainless Steel Pipe/Tube 1.Grade:304,304L,316,316L,321,317L,310S,904L and so on. 2 ... : 6mm-630mm pipe thickness : 0.8mm-25mm 2) Grade : 304,304L,316,316L,321,317L,310S,904L and so on. 3) Standards ...