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